Cubic Feet Calculator
Choose one supported geometric shape and enter every dimension in feet. The calculator reports the same single volume in three common cubic units.
How to use the Cubic Feet Calculator
Enter one supported shape and its required dimensions in feet.
Review inside versus outside dimensions, irregular voids, measurement precision, and whether a material allowance is needed separately.
Read the single geometric volume in cubic feet, cubic yards, and cubic meters.
Formula
Rectangular volume = length × width × height; cylinder volume = π × radius² × height; triangular-prism volume = base × triangle height ÷ 2 × prism length.
Example
A box measuring 4 ft × 3 ft × 2 ft has 24 ft³ of geometric volume.
Assumptions and limitations
- Objects are represented by the selected ideal geometric shapes; packing efficiency, wall thickness, and material compaction are excluded.
- Cubic Feet Calculator treats the entered values as estimates and does not infer missing project, account, or personal details.
- Calculations retain working precision except where the cited method requires an intermediate rounding step; displayed values are then formatted separately. Source rules and dated rates must be rechecked when they change.
Sources
- National Institute of Standards and Technology: SI Units — LengthLength, area, volume, and unit-conversion conventions. Reviewed 2026-08-14.
- National Institute of Standards and Technology: Circumference, Area and VolumeOfficial formula, rate, or program guidance used by this calculator. Reviewed 2026-08-14.
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Frequently asked questions
How does the Cubic Feet Calculator work?
Rectangular volume = length × width × height; cylinder volume = π × radius² × height; triangular-prism volume = base × triangle height ÷ 2 × prism length.
What information should I enter in the Cubic Feet Calculator?
Enter one supported shape and its required dimensions in feet, then verify inside versus outside dimensions, irregular voids, measurement precision, and whether a material allowance is needed separately.
What should I verify before using this Cubic Feet Calculator result?
Objects are represented by the selected ideal geometric shapes; packing efficiency, wall thickness, and material compaction are excluded.
Reviewed 2026-08-14 · 1.0.0 · content-2026-08-14 · Trusty Calculator Editorial Team