Wheelbarrow Volume Calculator
Tray size to struck, heaped, and trips per yard or meter.
What it does
A wheelbarrow rating hides real math. Labels round, trays slope, and mounded loads beat level ones by a wide margin. Volume from tape readings beats the sticker when you plan soil, gravel, or mulch moves.
The tool above multiplies inside length by width by depth for struck volume, adds a 1.3 heap factor, then divides a cubic yard or cubic meter by the heaped load. You get struck, heaped, and trips in one pass.
The geometry is plain box volume with a field heap allowance. Metric mode works in centimeters to liters; imperial mode works in inches to cubic feet. Both divide the local bulk target: 1000 liters per cubic meter or 27 cubic feet per cubic yard.
Use the trip count to stage work. If the page says 2.7 loads per yard, three trips cover it. If it says 5 loads per meter, plan the path, the dump spot, and the rest breaks before the pile arrives.
How to use
- Pick imperial (inches) or metric (cm).
- Measure inside length, width, and depth of the tray.
- Enter the three numbers and read struck load.
- Read heaped load for mounded soil or mulch.
- Use loads per yd3 or per m3 to plan trips.
- Round trips up for spill and uneven filling.
Formula
- L
- Inside tray length: cm (metric) or inches (imperial).
- W
- Inside tray width at the top.
- D
- Inside depth of the tray.
Target is 1 cubic meter (1000 L) in metric and 1 cubic yard (27 ft3) in imperial. The 1.3 heap factor is a field average for mounded loose fill; flat steel or water loads stay near struck.
Worked example
Example: 43 by 26 by 12 inch tray
A contractor tray 43 inches long, 26 wide, 12 deep.
- Tray is 43 in by 26 in by 12 in.
- Struck: 43 x 26 x 12 / 1728 = 7.76 ft3.
- Heaped: 7.76 x 1.3 = 10.09 ft3.
- Yard loads: 27 / 10.09 = 2.7 loads per yd3.
- Plan: three heaped trips move about a cubic yard.
Reference table
| Tray | Heaped | Trips |
|---|---|---|
| 4 ft3 label | About 5.2 ft3 heaped | About 5.2 per yd3 |
| 6 ft3 label | About 7.8 ft3 heaped | About 3.5 per yd3 |
| 8 ft3 contractor | About 10.4 ft3 heaped | About 2.6 per yd3 |
| 170 L barrow | About 221 L heaped | About 4.5 per m3 |
| 215 L barrow | About 280 L heaped | About 3.6 per m3 |
Limits
- Box model. Sloped or rounded trays vary a few percent.
- Heap factor is an average, not a promise.
- Volume only. Weight limits need density and scales.
- Spill and settling add trips on real sites.
Common mistakes
- Measuring outside faces instead of inside.
- Quoting struck loads for mounded soil.
- Mixing liters with cubic feet in one calc.
- Forgetting the 27 ft3 per yard divisor.
- Planning exact trips with no spare for spill.
Try it yourself
Quick checks. Answers sit tucked under each question.
Trips for a 100 by 60 by 25 cm tray?
Struck is 150.0 L, heaped is 195.0 L. Loads are 1000 / 195 = 5.1 per m3.
Trips for a 40 by 24 by 10 inch tray?
Struck is 5.56 ft3, heaped is 7.22 ft3. Loads are 27 / 7.22 = 3.7 per yd3.
Questions
What is the difference between struck and heaped?
Struck means level with the rim. Heaped means mounded above it, often about 30 % more on a tray with sloped sides. The tool reports both so bids and backs agree.
Where exactly do I measure the tray?
Inside top faces. Sloped trays vary top to bottom, so measure the top opening and the inside depth, then treat the shape as a box. The result is a planning figure within a few percent.
Does this tell me the safe weight?
No. Wet soil can weigh twice the dry value and slump less. Use this page for volume planning and check load charts or scales for weight limits.
What size is a standard wheelbarrow?
About 6 ft3 struck for a common 6 ft3 barrow, or about 170 liters. Contractor grade runs larger. Measure yours rather than trusting the label.
How many trips for a bulk delivery?
Divide the delivery amount by the heaped volume. For 2 cubic yards with a 10.09 ft3 heaped tray: 54 / 10.09 = 5.4, so plan 6 trips.
Can I use this for buckets or carts?
Yes, for planning. A bucket is a box too, so the same length times width times depth logic applies. Wheelbarrow trays just add the 1.3 heap factor.