Production Management calculator
Truck Pack Calculator: How Many Trucks?
A 26-foot box truck holds roughly 1,700 cubic feet, and a realistic show pack uses 60 to 70 percent of it once wheels, case shapes, and load order have their say. Enter total case volume, truck size, and a pack efficiency to get the truck count for planning and quoting.
Sum of case length × width × height. Case inventory lists usually carry the numbers.
Cases never tessellate perfectly. 60 to 70% is a realistic planning band; a dialed touring pack does better.
Formulas
Trucks needed
trucks = ceil( volume / (capacity × efficiency) )- volume:
- total case volume in cubic feet
- capacity:
- usable truck volume (varies by fleet)
- efficiency:
- realistic fill fraction, typically 0.6 to 0.7
How it works
The estimate is straight division with an honesty factor. Case inventories give length, width, and height per case; summing them yields the theoretical volume. The efficiency factor absorbs reality: round truss in square trucks, wheel wells, dog houses, the aisle you leave to reach the first-off cases, and the pack order the load-in demands.
Weight can beat volume to the limit. A truck of lighting cable or staging deck grosses out before it cubes out, while a truck of empty road cases does the opposite. This calculator does volume only; for dense gear, check axle and gross weight limits with the carrier before trusting the cube math.
Capacities here are planning figures for common rentals; actual fleets vary by body maker and year. Production practice adds margin deliberately: the show that exactly fills three trucks ships in four, because the alternative is re-packing at midnight in the rain.
Worked example: Corporate audio and video package totaling 2,400 cu ft of cases
- 1.Usable volume of a 26' box at 65%: 1,700 × 0.65 = 1,105 cu ft.
- 2.Trucks: 2,400 / 1,105 = 2.17, rounded up to 3.
- 3.The third truck runs about 17% full, which is exactly the margin a sane pack wants.
Three 26' trucks, with breathing room for the things nobody put on the case list.
Planning capacities by vehicle
| Vehicle | Approx. usable volume | At 65% efficiency |
|---|---|---|
| Cargo van / Sprinter | 350 cu ft | 230 cu ft |
| 16' box truck | 800 cu ft | 520 cu ft |
| 26' box truck | 1,700 cu ft | 1,105 cu ft |
| 53' trailer | 3,900 cu ft | 2,535 cu ft |
Field notes
- Pack the truck on paper before load-out: a pack map taped inside the door settles arguments faster than authority does.
- Case dimensions in inventory systems drift from reality after re-casing; spot-check the big items before quoting a tight pack.
Frequently asked questions
How many cubic feet is a 26-foot box truck?
Around 1,400 to 1,800 cu ft depending on body and height; 1,700 is a common planning figure. A 16-foot box runs about 800, a Sprinter 300 to 400, and a 53-foot trailer roughly 3,800 to 4,000.
What pack efficiency should I assume?
Between 60 and 70% for mixed production gear. A repeatable touring pack that was designed case-by-case can exceed 75%; a one-off load of odd scenic pieces can fall under 50%.
Why did my gear not fit even though the volume said it would?
Shape and order. Volume math assumes cases combine freely; real packs must load in reverse of the load-in, keep heavy items low, and leave truss, carpet rolls, and ground support their awkward space. That gap is what the efficiency factor exists to cover.