Cubic Feet Calculator
Multiply length x width x height (in feet) to get cubic feet. Use this for lumber stacks, firewood, storage space, or shipping volume.
Quick Answer
Multiply length x width x height (in feet) to get cubic feet. Use this for lumber stacks, firewood, storage space, or shipping volume.
Cubic Feet Calculator
Enter your values below for an instant result, then see the formula, worked example, and common mistakes.
Enter your values and click calculate.
How to Use This Calculator
Convert inches to feet (divide by 12) before entering values for an accurate result.
For irregular shapes, measure the smallest rectangular box that contains the space or stack.
1 cubic yard = 27 cubic feet; 1 cubic foot = 0.0283 cubic meters.
When buying mulch, gravel, or fill by volume, round up to the next full unit sold.
Formula
Cubic feet = Length x Width x Height (all in feet).
Reference Table: Common Conversions
| Unit | Equals |
|---|---|
| 1 cubic foot | 1,728 cubic inches |
| 1 cubic yard | 27 cubic feet |
| 1 cubic foot | 0.0283 cubic meters |
| 1 cubic meter | 35.31 cubic feet |
Common Mistakes to Avoid
- Mixing units (inches and feet) without converting first.
- Measuring only one dimension and assuming a cube.
- Forgetting that volume by weight (like mulch or gravel) can vary by material density.
- Not rounding up when buying bagged or bulk material sold in fixed unit sizes.
When the Estimate May Be Wrong
This calculator assumes a simple rectangular volume. For irregular shapes (rounded piles, tapered stacks), the real volume will be less than the enclosing box calculated here — treat the result as a maximum estimate.
FAQs
How do I convert cubic feet to cubic yards?
Divide cubic feet by 27 (since 1 cubic yard = 27 cubic feet).
How do I calculate cubic feet from inches?
Convert each dimension to feet first (divide inches by 12), then multiply length x width x height.
Does this work for firewood or mulch?
Yes, for a simple rectangular stack or bin. Irregular piles will hold slightly less than the calculated volume.
Sources and Methodology
This page uses standard volumetric conversion factors (1 cubic yard = 27 cubic feet, 1 cubic foot = 0.0283168 cubic meters, 1 cubic foot = 1,728 cubic inches).
