How to calculate a loader bucket
Skid steer and tractor buckets are rated in cubic yards, so you can convert a pile into a bucket count.
- Find your bucket capacity, or estimate it with width, depth, and height.
- Divide the cubic yards you need by the bucket capacity.
- Allow for a heaped or struck bucket as the rating states.
- Round up and add a few spare scoops.
Worked example
For a typical loader bucket with length 4 ft, width 2.5 ft, depth 1.5 ft, the volume is 15.00 cubic feet. Divide by 27 for 0.56 cubic yards. With a 10 percent allowance, plan for 0.61 cubic yards.
Loader Bucket sizes and quantities
These common sizes are calculated with the same formula as the tool above, so you can find your number quickly.
| Size | Cubic feet | Cubic yards | With 10 percent extra |
|---|---|---|---|
| 4 by 2.5 ft, 1.5 ft deep | 15.00 | 0.56 | 0.61 |
| 5 by 3 ft, 2 ft deep | 30.00 | 1.11 | 1.22 |
| 6 by 3.5 ft, 2.5 ft deep | 52.50 | 1.94 | 2.14 |
| 8 by 4 ft, 3 ft deep | 96.00 | 3.56 | 3.91 |
Tips
- A struck bucket is level with the edge, and a heaped bucket is piled above it.
- Heavy materials reduce what the machine can safely lift.
- Check the rated operating capacity of the machine.
Common mistakes to avoid
- Assuming a heaped capacity when the rating is struck.
- Overloading a small machine.
- Not counting the time to refill.
Frequently asked questions
How many cubic yards do I need for a loader bucket?
Multiply the dimensions in feet and divide by 27. The example above, length 4 ft, width 2.5 ft, depth 1.5 ft, needs 0.56 cubic yards before waste.
How much extra should I order?
Add 5 to 10 percent for waste. Add more if the ground is uneven or the material is loose.
Can I enter inches and feet together?
Yes. Each box has its own unit selector, so you can mix feet and inches.
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