# Cubic Feet Calculator

URL: https://speedycalculator.com/calculators/conversion/cubic-feet-calculator/
Last updated: 2026-10-25

> The cubic feet calculator works out the volume of a box, room, trench or container from its length, width and height, in cubic feet and other units, plus how many litres or gallons it holds.

## Inputs

- Length (ft, m, km, cm, in, yd, mi)
- Width (ft, m, km, cm, in, yd, mi)
- Height (depth) (ft, m, km, cm, in, yd, mi)

## Results

- Volume
- In cubic yards
- In litres
- In US gallons

## Formula

```
volume = length × width × height
```

## Explanation

Cubic feet are used for shipping, moving trucks, refrigerators and concrete or mulch orders in the U.S. One cubic foot is about 28.3 litres or 7.48 U.S. gallons.

### How to use the Cubic Feet Calculator

- **Length**
- **Width**
- **Height (depth)**
- Every result field is editable: type into **Volume** or any other result and **Height (depth)** plus every other field update to match.

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Each dimension is converted to metres, the three are multiplied, and the volume is shown in every unit. Mix units freely, for example feet and inches. Type a target volume into a result to solve for the height.

### Inputs explained

FieldWhat to enterLengthUnits: ft, m, km, cm, in, yd …WidthUnits: ft, m, km, cm, in, yd …Height (depth)Units: ft, m, km, cm, in, yd …

### What each result means

- **Volume** = [Length] × [Width] × [Height (depth)]
- **In cubic yards** = [Length] × [Width] × [Height (depth)]
- **In litres** = [Length] × [Width] × [Height (depth)]
- **In US gallons** = [Length] × [Width] × [Height (depth)]

### Example values

How the main result changes when **Height** changes and everything else stays at the example values above:

Height (depth) (ft)Volume (ft³)1801.512021602.520032404320

## Worked example

Inputs — Length: 10 ft; Width: 8 ft; Height (depth): 2 ft.

Results — **Volume = 160 ft³**; In cubic yards = 5.9259 yd³; In litres = 4,530.7 L; In US gallons = 1,196.9 US gal.

## FAQ

**How many cubic feet in a cubic yard?**
27.

**How many gallons in a cubic foot?**
About 7.48 US gal.

**How do I find cubic feet from inches?**
Multiply the three dimensions in inches and divide by 1,728.

**What formula does the Cubic Feet Calculator use?**
volume = length × width × height.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)