Load Calculator API

version 2

Load Calculator API calculates the optimal way to load cargo (boxes, pallets, rolls) into containers and pallets. Provide item dimensions, weights, and stacking rules along with the containers or pallets available, and the API returns a 3D packing plan, container utilization statistics, and optional renderable images of the result.

OpenAPI Specification

Get started with your API integration in just a few minutes. The OpenAPI specification provides a complete overview of all available endpoints, request parameters, authentication methods, and response formats, allowing you to easily explore, test, and interact with the API.

OpenAPI Spec

General information

Load Calculator API is organized around REST.
The API uses predictable resource-based URLs, supports JSON request payloads, returns responses in JSON format, and relies on standard HTTP methods, status codes, and authentication mechanisms.

API endpoint#

1https://api.qubictron.com/load-calculator/v2

All endpoints are only accessible via HTTPS and are located at api.qubictron.com

Get packing result

post/pack

API key required for authentication.
Pass it as an HTTP header: x-api-key: YOUR_API_KEY

If the key is missing or invalid, the API returns HTTP 401 with {"success": false, "status_code": "INVALID_API_KEY"}

Example: x-api-key: 123

Headers

Content-Typeapplication/json

Body Parameters

optionsREQUIREDobject
lengthUnits
Optional
string
Length units: meters (m) or inches (inch)
Allowed values:mmmftinchyd
Default:m
weightUnits
Optional
string
Weight units: kilograms (kg) or foot (ft)
Allowed values:kglb
Default:kg
lengthAccuracy
Optional
number
Length measurement accuracy. All dimensions are rounded to the specified precision.
>= 0.0001<= 100
Default:0.001
groupsREQUIREDarray[object]
Groups are an array of JSON objects arranged in a strict order, which is taken into account when stuffing containers. The closer to the beginning of the array the group, the earlier it will be stuffed. A group can contain a pallet setting for a group.
uid
Optional
string
Unique group identifier, allows you to identify the group in results of loading
pallets
Optional
object
Pallet settings for a group. If the field is undefined || null, then the pallets will not be used when loading
size
REQUIRED
object
Area (volume) of the pallet allowed for loading
length
REQUIRED
number
width
REQUIRED
number
height
REQUIRED
number
weight
REQUIRED
number
Pallet weight excluding cargo
maxWeight
REQUIRED
number
Maximum permissible pallet load
depth
REQUIRED
number
Pallet thickness. Length and width are taken from the size field
stacking
Optional
object
Pallet stacking & stuffing settings
layers
Optional
integer
Quantity of pallets stacked on top of each other
fill
Optional
number
The minimum stuffing level of the top layer of cargo on a pallet for placing the pallet on top. Indicated in fractions of one, i.e. 80% is 0.8, 90% is 0.9, etc.
>= 0<= 1
items
REQUIRED
array (anyOf)
List of metadata objects to stuff
type
REQUIRED
string
Type of cargo
Allowed values:boxsacksbigbags
uid
Optional
string
The unique object identifier, allows you to identify the object in the results of loading
attr
Optional
object
Any data, it will be copied for objects in the results
size
REQUIRED
object
One box size.
length
REQUIRED
number
Example:100
width
REQUIRED
number
Example:100
height
REQUIRED
number
Example:100
qty
REQUIRED
integer
Quantity of boxes
>= 1<= 1000000
Example:50
weight
REQUIRED
number
Weight of one box
Example:10
color
Optional
string
Box color
Example:#FFFFFF
stacking
Optional
object
Stacking and stuffing options
tiltX
Optional
boolean
Allow tilting the box along the width
Default:true
tiltY
Optional
boolean
Allow tilting the box along the length
Default:true
topWeight
Optional
number
Allowed weight on top
layers
Optional
integer
Allowable quantity of boxes in a vertical stack
maxHeight
Optional
number
Maximum stacking height with boxes
type
REQUIRED
string
Type of cargo
Allowed values:rollbarrelspipes
uid
Optional
string
The unique object identifier, allows you to identify the object in the results of loading
attr
Optional
object
Any data, it will be copied for objects in the results
size
REQUIRED
object
One roll size.
radius
REQUIRED
number
Example:100
height
REQUIRED
number
Example:100
qty
REQUIRED
integer
Quantity of rolls
>= 1<= 1000000
Example:50
weight
REQUIRED
number
Weight of one roll
Example:10
color
Optional
string
Roll color
Example:#FFFFFF
stacking
Optional
object
Stacking and stuffing options
tilt
Optional
boolean
Allow tilting the box along the width
Default:true
arrange
Optional
string
Allowed values:verticalhorizontal
Default:vertical
topWeight
Optional
number
Allowed weight on top
layers
Optional
integer
Allowable quantity of boxes in a vertical stack
maxHeight
Optional
number
Maximum stacking height with boxes
containersOptionalarray[object]
fixed quantity of containers that fill up earlier than auto containers
spaces
Optional
array
An array of container spaces. Standard containers have only 1 section, but ULD containers can contain 2 or 3 sections.
length
REQUIRED
number
Example:12020
width
REQUIRED
number
Example:2350
height
REQUIRED
number
Example:2690
maxWeight
REQUIRED
number
Example:26460
qty
Optional
integer
Quantity of containers. The option is not taken into account for autocontainers
Default:1
Example:1
loadType
Optional
string
Allowed values:autowallLengthwallWidthfloor
Default:auto
groups
Optional
array
List of groups allowed for loading into this container. The option is not taken into account for autocontainers.
attr
Optional
object
Any data, it will be copied for objects in the results
autoContainersREQUIREDarray[object]
The algorithm determines which type will be used for loading automatically.
spaces
Optional
array
An array of container spaces. Standard containers have only 1 section, but ULD containers can contain 2 or 3 sections.
length
REQUIRED
number
Example:12020
width
REQUIRED
number
Example:2350
height
REQUIRED
number
Example:2690
maxWeight
REQUIRED
number
Example:26460
qty
Optional
integer
Quantity of containers. The option is not taken into account for autocontainers
Default:1
Example:1
loadType
Optional
string
Allowed values:autowallLengthwallWidthfloor
Default:auto
groups
Optional
array
List of groups allowed for loading into this container. The option is not taken into account for autocontainers.
attr
Optional
object
Any data, it will be copied for objects in the results
imagesOptionalobject
height
Optional
integer
>= 20<= 1000
width
REQUIRED
integer
>= 20<= 800
image3d
Optional
boolean
Return 3d images in gltf format
Default:false

Request sample

Example 1

{
  "options": {
    "lengthUnits": "mm",
    "weightUnits": "kg",
    "lengthAccuracy": 5,
    "remainsNear": true
  },
  "groups": [
    {
      "name": "Group #1",
      "uid": 111,
      "color": "#000",
      "pallets": {
        "uid": "1dca98",
        "color": "#000",
        "size": {
          "length": 1200,
          "width": 800,
          "height": 2000
        },
        "stacking": {
          "maxHeight": null,
          "layers": 3,
          "fill": 0.85
        },
        "weight": 10,
        "maxWeight": 1500,
        "depth": 100,
        "name": "euro",
        "type": "euro"
      },
      "items": [
        {
          "color": "#23b753",
          "index": 1,
          "name": "Boxes 1",
          "qty": "400",
          "type": "box",
          "uid": "2222",
          "weight": 10,
          "size": {
            "length": 500,
            "width": 400,
            "height": 300,
            "radius": null
          },
          "stacking": {
            "tiltX": true,
            "tiltY": false,
            "layers": null,
            "topWeight": null,
            "height": null,
            "fill": null,
            "rollPlacement": null
          }
        }
      ]
    }
  ],
  "containers": [],
  "autoContainers": [
    {
      "attr": {
        "type": "20st"
      },
      "spaces": [
        {
          "length": 5890,
          "width": 2350,
          "height": 2390,
          "maxWeight": 28230
        }
      ]
    },
    {
      "attr": {
        "type": "40st"
      },
      "spaces": [
        {
          "length": 12020,
          "width": 2350,
          "height": 2390,
          "maxWeight": 26700
        }
      ]
    },
    {
      "attr": {
        "type": "40hq"
      },
      "spaces": [
        {
          "length": 12020,
          "width": 2350,
          "height": 2690,
          "maxWeight": 26460
        }
      ]
    }
  ],
  "auth": {
    "demo": false,
    "user": false
  },
  "errorProducts": [],
  "palletCheckLoader": false
}

Response example

Successful operation

1{
2  "result": [
3    {
4      "qty": 1,
5      "spaces": [
6        {
7          "general": {
8            "itemQty": 32,
9            "cargoVolume": 1920000000,
10            "cargoWeight": 320,
11            "items": {
12              "2222": 32
13            },
14            "volumeRatio": 1,
15            "weightRatio": 0.21333333333333335
16          },
17          "floorBox": {
18            "x": 800,
19            "y": 1200,
20            "z": 100
21          },
22          "children": [
23            {
24              "general": {
25                "itemQty": 32,
26                "cargoVolume": 1920000000,
27                "cargoWeight": 320,
28                "items": {
29                  "2222": 32
30                }
31              },
32              "children": null,
33              "form": "box",
34              "uid": "2222",
35              "color": "#23b753",
36              "name": "Boxes 1",
37              "size": {
38                "x": 400,
39                "y": 300,
40                "z": 500
41              },
42              "complex": {
43                "x": 2,
44                "y": 4,
45                "z": 4
46              },
47              "location": {
48                "x": 0,
49                "y": 0,
50                "z": 0
51              }
52            }
53          ],
54          "form": "box",
55          "uid": "8523d727-89d9-4733-a739-8c9444749377",
56          "color": null,
57          "name": null,
58          "size": {
59            "x": 800,
60            "y": 1200,
61            "z": 2100
62          },
63          "complex": {
64            "x": 1,
65            "y": 1,
66            "z": 1
67          },
68          "location": {
69            "x": 0,
70            "y": 0,
71            "z": 0
72          }
73        },
74        {
75          "general": {
76            "itemQty": 32,
77            "cargoVolume": 1920000000,
78            "cargoWeight": 320,
79            "items": {
80              "2222": 32
81            },
82            "volumeRatio": 1,
83            "weightRatio": 0.21333333333333335
84          },
85          "floorBox": {
86            "x": 800,
87            "y": 1200,
88            "z": 100
89          },
90          "children": [
91            {
92              "general": {
93                "itemQty": 32,
94                "cargoVolume": 1920000000,
95                "cargoWeight": 320,
96                "items": {
97                  "2222": 32
98                }
99              },
100              "children": null,
101              "form": "box",
102              "uid": "2222",
103              "color": "#23b753",
104              "name": "Boxes 1",
105              "size": {
106                "x": 400,
107                "y": 300,
108                "z": 500
109              },
110              "complex": {
111                "x": 2,
112                "y": 4,
113                "z": 4
114              },
115              "location": {
116                "x": 0,
117                "y": 0,
118                "z": 0
119              }
120            }
121          ],
122          "form": "box",
123          "uid": "ca7b1ad0-84ac-40e2-9233-49415c07763e",
124          "color": null,
125          "name": null,
126          "size": {
127            "x": 800,
128            "y": 1200,
129            "z": 2100
130          },
131          "complex": {
132            "x": 1,
133            "y": 1,
134            "z": 1
135          },
136          "location": {
137            "x": 800,
138            "y": 0,
139            "z": 0
140          }
141        },
142        {
143          "general": {
144            "itemQty": 32,
145            "cargoVolume": 1920000000,
146            "cargoWeight": 320,
147            "items": {
148              "2222": 32
149            },
150            "volumeRatio": 1,
151            "weightRatio": 0.21333333333333335
152          },
153          "floorBox": {
154            "x": 800,
155            "y": 1200,
156            "z": 100
157          },
158          "children": [
159            {
160              "general": {
161                "itemQty": 32,
162                "cargoVolume": 1920000000,
163                "cargoWeight": 320,
164                "items": {
165                  "2222": 32
166                }
167              },
168              "children": null,
169              "form": "box",
170              "uid": "2222",
171              "color": "#23b753",
172              "name": "Boxes 1",
173              "size": {
174                "x": 400,
175                "y": 300,
176                "z": 500
177              },
178              "complex": {
179                "x": 2,
180                "y": 4,
181                "z": 4
182              },
183              "location": {
184                "x": 0,
185                "y": 0,
186                "z": 0
187              }
188            }
189          ],
190          "form": "box",
191          "uid": "2a5252ca-a9a5-4075-9a8a-06e6f2a065f7",
192          "color": null,
193          "name": null,
194          "size": {
195            "x": 800,
196            "y": 1200,
197            "z": 2100
198          },
199          "complex": {
200            "x": 1,
201            "y": 1,
202            "z": 1
203          },
204          "location": {
205            "x": 1600,
206            "y": 0,
207            "z": 0
208          }
209        },
210        {
211          "general": {
212            "itemQty": 32,
213            "cargoVolume": 1920000000,
214            "cargoWeight": 320,
215            "items": {
216              "2222": 32
217            },
218            "volumeRatio": 1,
219            "weightRatio": 0.21333333333333335
220          },
221          "floorBox": {
222            "x": 800,
223            "y": 1200,
224            "z": 100
225          },
226          "children": [
227            {
228              "general": {
229                "itemQty": 32,
230                "cargoVolume": 1920000000,
231                "cargoWeight": 320,
232                "items": {
233                  "2222": 32
234                }
235              },
236              "children": null,
237              "form": "box",
238              "uid": "2222",
239              "color": "#23b753",
240              "name": "Boxes 1",
241              "size": {
242                "x": 400,
243                "y": 300,
244                "z": 500
245              },
246              "complex": {
247                "x": 2,
248                "y": 4,
249                "z": 4
250              },
251              "location": {
252                "x": 0,
253                "y": 0,
254                "z": 0
255              }
256            }
257          ],
258          "form": "box",
259          "uid": "3da21465-7881-45cb-800f-e6223eea4f2d",
260          "color": null,
261          "name": null,
262          "size": {
263            "x": 800,
264            "y": 1200,
265            "z": 2100
266          },
267          "complex": {
268            "x": 1,
269            "y": 1,
270            "z": 1
271          },
272          "location": {
273            "x": 2400,
274            "y": 0,
275            "z": 0
276          }
277        },
278        {
279          "general": {
280            "itemQty": 32,
281            "cargoVolume": 1920000000,
282            "cargoWeight": 320,
283            "items": {
284              "2222": 32
285            },
286            "volumeRatio": 1,
287            "weightRatio": 0.21333333333333335
288          },
289          "floorBox": {
290            "x": 800,
291            "y": 1200,
292            "z": 100
293          },
294          "children": [
295            {
296              "general": {
297                "itemQty": 32,
298                "cargoVolume": 1920000000,
299                "cargoWeight": 320,
300                "items": {
301                  "2222": 32
302                }
303              },
304              "children": null,
305              "form": "box",
306              "uid": "2222",
307              "color": "#23b753",
308              "name": "Boxes 1",
309              "size": {
310                "x": 400,
311                "y": 300,
312                "z": 500
313              },
314              "complex": {
315                "x": 2,
316                "y": 4,
317                "z": 4
318              },
319              "location": {
320                "x": 0,
321                "y": 0,
322                "z": 0
323              }
324            }
325          ],
326          "form": "box",
327          "uid": "a95971ca-913b-4548-bf1e-63215a5233d9",
328          "color": null,
329          "name": null,
330          "size": {
331            "x": 800,
332            "y": 1200,
333            "z": 2100
334          },
335          "complex": {
336            "x": 1,
337            "y": 1,
338            "z": 1
339          },
340          "location": {
341            "x": 3200,
342            "y": 0,
343            "z": 0
344          }
345        },
346        {
347          "general": {
348            "itemQty": 32,
349            "cargoVolume": 1920000000,
350            "cargoWeight": 320,
351            "items": {
352              "2222": 32
353            },
354            "volumeRatio": 1,
355            "weightRatio": 0.21333333333333335
356          },
357          "floorBox": {
358            "x": 800,
359            "y": 1200,
360            "z": 100
361          },
362          "children": [
363            {
364              "general": {
365                "itemQty": 32,
366                "cargoVolume": 1920000000,
367                "cargoWeight": 320,
368                "items": {
369                  "2222": 32
370                }
371              },
372              "children": null,
373              "form": "box",
374              "uid": "2222",
375              "color": "#23b753",
376              "name": "Boxes 1",
377              "size": {
378                "x": 400,
379                "y": 300,
380                "z": 500
381              },
382              "complex": {
383                "x": 2,
384                "y": 4,
385                "z": 4
386              },
387              "location": {
388                "x": 0,
389                "y": 0,
390                "z": 0
391              }
392            }
393          ],
394          "form": "box",
395          "uid": "481bb82e-6fd7-4d18-b715-e7deb0bee191",
396          "color": null,
397          "name": null,
398          "size": {
399            "x": 800,
400            "y": 1200,
401            "z": 2100
402          },
403          "complex": {
404            "x": 1,
405            "y": 1,
406            "z": 1
407          },
408          "location": {
409            "x": 4000,
410            "y": 0,
411            "z": 0
412          }
413        },
414        {
415          "general": {
416            "itemQty": 32,
417            "cargoVolume": 1920000000,
418            "cargoWeight": 320,
419            "items": {
420              "2222": 32
421            },
422            "volumeRatio": 1,
423            "weightRatio": 0.21333333333333335
424          },
425          "floorBox": {
426            "x": 800,
427            "y": 1200,
428            "z": 100
429          },
430          "children": [
431            {
432              "general": {
433                "itemQty": 32,
434                "cargoVolume": 1920000000,
435                "cargoWeight": 320,
436                "items": {
437                  "2222": 32
438                }
439              },
440              "children": null,
441              "form": "box",
442              "uid": "2222",
443              "color": "#23b753",
444              "name": "Boxes 1",
445              "size": {
446                "x": 400,
447                "y": 300,
448                "z": 500
449              },
450              "complex": {
451                "x": 2,
452                "y": 4,
453                "z": 4
454              },
455              "location": {
456                "x": 0,
457                "y": 0,
458                "z": 0
459              }
460            }
461          ],
462          "form": "box",
463          "uid": "99b404cc-68c8-4689-a680-ae2a149a96c8",
464          "color": null,
465          "name": null,
466          "size": {
467            "x": 800,
468            "y": 1200,
469            "z": 2100
470          },
471          "complex": {
472            "x": 1,
473            "y": 1,
474            "z": 1
475          },
476          "location": {
477            "x": 4800,
478            "y": 0,
479            "z": 0
480          }
481        },
482        {
483          "general": {
484            "itemQty": 32,
485            "cargoVolume": 1920000000,
486            "cargoWeight": 320,
487            "items": {
488              "2222": 32
489            },
490            "volumeRatio": 1,
491            "weightRatio": 0.21333333333333335
492          },
493          "floorBox": {
494            "x": 1200,
495            "y": 800,
496            "z": 100
497          },
498          "children": [
499            {
500              "general": {
501                "itemQty": 32,
502                "cargoVolume": 1920000000,
503                "cargoWeight": 320,
504                "items": {
505                  "2222": 32
506                }
507              },
508              "children": null,
509              "form": "box",
510              "uid": "2222",
511              "color": "#23b753",
512              "name": "Boxes 1",
513              "size": {
514                "x": 300,
515                "y": 400,
516                "z": 500
517              },
518              "complex": {
519                "x": 4,
520                "y": 2,
521                "z": 4
522              },
523              "location": {
524                "x": 0,
525                "y": 0,
526                "z": 0
527              }
528            }
529          ],
530          "form": "box",
531          "uid": "73696560-9d1a-45e5-b7ab-f5c3643784e6",
532          "color": null,
533          "name": null,
534          "size": {
535            "x": 1200,
536            "y": 800,
537            "z": 2100
538          },
539          "complex": {
540            "x": 1,
541            "y": 1,
542            "z": 1
543          },
544          "location": {
545            "x": 0,
546            "y": 1200,
547            "z": 0
548          }
549        },
550        {
551          "general": {
552            "itemQty": 32,
553            "cargoVolume": 1920000000,
554            "cargoWeight": 320,
555            "items": {
556              "2222": 32
557            },
558            "volumeRatio": 1,
559            "weightRatio": 0.21333333333333335
560          },
561          "floorBox": {
562            "x": 1200,
563            "y": 800,
564            "z": 100
565          },
566          "children": [
567            {
568              "general": {
569                "itemQty": 32,
570                "cargoVolume": 1920000000,
571                "cargoWeight": 320,
572                "items": {
573                  "2222": 32
574                }
575              },
576              "children": null,
577              "form": "box",
578              "uid": "2222",
579              "color": "#23b753",
580              "name": "Boxes 1",
581              "size": {
582                "x": 300,
583                "y": 400,
584                "z": 500
585              },
586              "complex": {
587                "x": 4,
588                "y": 2,
589                "z": 4
590              },
591              "location": {
592                "x": 0,
593                "y": 0,
594                "z": 0
595              }
596            }
597          ],
598          "form": "box",
599          "uid": "b77ef764-995e-4409-8c7a-fb8fc144fe4e",
600          "color": null,
601          "name": null,
602          "size": {
603            "x": 1200,
604            "y": 800,
605            "z": 2100
606          },
607          "complex": {
608            "x": 1,
609            "y": 1,
610            "z": 1
611          },
612          "location": {
613            "x": 1200,
614            "y": 1200,
615            "z": 0
616          }
617        },
618        {
619          "general": {
620            "itemQty": 32,
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