Cubic Feet Calculator

Cubic feet from inches, feet, yards, cm or metres for boxes, rooms and cylinders, several items at once, with cubic yards, m³, litres and gallons.

Cubic feet measure volume: length × width × height, with every measurement in feet. A box or room 6 ft long, 4 ft wide and 3 ft high holds 72 ft³, which is 2.67 cubic yards, 2.04 m³ or about 539 US gallons. From inches, multiply the three sizes and divide by 1,728, the cubic inches in a cubic foot: a 24 × 18 × 12 in box is 3 ft³. This calculator takes measurements in inches, feet (including feet and inches like 6'4), yards, centimetres, millimetres or metres. It handles boxes, rooms and cylinders, and adds up several items with quantities, so you can total a pile of moving boxes or a set of planters. Results show cubic feet, cubic inches, cubic yards, cubic metres, litres, and US and UK gallons.

Units
Item
ft
ft
ft
Feet and inches work too: type 12'6 or 12.5.
Cubic feet
72 ft³

124,416 cubic inches

Cubic yards
2.667 yd³

ft³ ÷ 27

Cubic metres
2.039 m³

2,039 litres

Gallons
538.6 US gal

448.5 UK gal

How it was worked out
  1. 6 × 4 × 3 ft = 72 ft³

Common use cases

  • Work out the cubic feet of moving boxes, furniture or a storage unit
  • Find the volume of a room, freezer, fridge or shed
  • Check the cubic feet of a shipping box or pallet load
  • Total the volume of several planters, tanks or containers

How to use

  1. Choose the unit your measurements are in.
  2. Pick box or cylinder, then enter the length, width and height, or the diameter and height.
  3. Enter how many of that item there are.
  4. Add more items if you need a total.
  5. Read the cubic feet, and the same volume in yards, metres, litres and gallons.

FAQ

How do I calculate cubic feet?

Multiply length × width × height with all three in feet. A 6 × 4 × 3 ft space is 72 ft³. If you measured in inches, multiply the three numbers and divide by 1,728. In centimetres, multiply and divide by 28,317.

How many cubic feet is a box 24 × 18 × 12 inches?

24 × 18 × 12 = 5,184 cubic inches, and 5,184 ÷ 1,728 = 3 ft³.

How do I convert cubic feet to cubic yards or gallons?

Divide cubic feet by 27 for cubic yards: 72 ft³ is 2.67 yd³. One cubic foot is 7.48 US gallons, 6.23 UK gallons or 28.3 litres.

How do I work out the cubic feet of a cylinder?

Multiply π by the radius squared by the height, all in feet. A drum or planter 2 ft across and 4 ft tall is 3.1416 × 1² × 4 = 12.57 ft³. Choose cylinder in the calculator and enter the diameter; it halves it for you.

How many cubic feet is a 120 × 80 × 100 cm pallet load?

120 × 80 × 100 cm is 0.96 m³, which is 33.9 ft³.

Related tools

Results are estimates for planning and buying materials, worked out from the figures you enter and typical values (weights, coverage, sizes) that vary by product and supplier. They are not engineering, building or professional advice. Check your local building code, the product maker's instructions and your supplier's figures before you buy or build, and use a qualified professional for structural, electrical and gas work.