Cf Calculator
Cf calculator works out Volume (cubic feet) and Volume (cubic yards) from Length, Width and Depth / height / thickness. The default figures on this page give volume (cubic feet) of 60 ft3; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Footprint = 3 x 4 = 12 ft^2
- Volume per item = footprint x depth = 1.6990108 m^3 = 60 ft^3
- 60 ft^3 = 2.2222222 yd^3 = 1.6990108 m^3
Its 4 worked examples are re-run on every release, last on 15 September 2026. What changed
What the cf calculator calculates
Turns measured dimensions (or an area and a depth) into cubic feet, cubic yards, cubic metres, litres and gallons, with quantity, waste allowance, bag count and weight.
How to use this cf calculator
Enter Length, Width, Depth / height / thickness and Area. Volume (cubic feet) updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Volume (cubic feet), Volume (cubic yards) and Volume (cubic metres).
The method follows NIST Special Publication 811, Guide for the Use of the International System of Units (exact 1 ft = 0.3048 m, 1 yd3 = 27 ft3) and NIST Handbook 44, Appendix C — General Tables of Units of Measurement (cubic measure and the board foot).
What you can compare
Change one input at a time to see how it affects Volume (cubic feet), Volume (cubic yards) and Volume (cubic metres). The inputs you can vary are Length, Width, Depth / height / thickness, Area, Area unit and Waste / overage allowance.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do you calculate CF?
Turns measured dimensions (or an area and a depth) into cubic feet, cubic yards, cubic metres, litres and gallons, with quantity, waste allowance, bag count and weight. Open “How this is worked out” beside the result to see each step for your own figures.
How many cubic feet is 12x12x12 inches?
On the figures this page opens with — length 3, width 4 and depth / height / thickness 5 — the volume (cubic feet) is 60 ft3. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How do I calculate cubic feet?
It needs Length, Width, Depth / height / thickness, Area, Area unit and Waste / overage allowance. Nothing else is required, and the figures stay in your browser.
How many cubic feet is 10x10x10?
The result gives Volume (cubic feet), Volume (cubic yards), Volume (cubic metres), Volume (cubic inches), Volume (litres) and Volume (US gallons), each labelled with its unit so the figure can be read on its own.
What information do I need for the cf calculator?
You need Length, Width, Depth / height / thickness, Area, Area unit, Waste / overage allowance, Bag or container size (cubic feet) and Density (optional). The page opens with default figures that give volume (cubic feet) of 60 ft3, so you can see the scale before entering your own.
What does this cf calculator show?
It shows Volume (cubic feet), Volume (cubic yards), Volume (cubic metres), Volume (cubic inches), Volume (litres), Volume (US gallons), Board feet and Volume per item (cubic feet), with the working and any warnings for your entries.