---
title: "Square feet to Square inches — ft² to in² converter"
description: "1 square foot = 144 square inches. Convert square feet to square inches with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/square-feet-to-square-inches/
site: "At One Place"
---

# Square feet to square inches

**1 square foot in square inches: 1 ft² = 144 in²**

in² = ft² × 144

To convert square feet to square inches, multiply by 144. The table below gives the values people look up most often, and the converter works for any number.

## Square feet to square inches table

*Common square foot values converted to square inches.*

| Square feet | Square inches |
| --- | --- |
| 1 ft² | 144 |
| 2 ft² | 288 |
| 3 ft² | 432 |
| 4 ft² | 576 |
| 5 ft² | 720 |
| 10 ft² | 1,440 |
| 15 ft² | 2,160 |
| 20 ft² | 2,880 |
| 25 ft² | 3,600 |
| 30 ft² | 4,320 |
| 40 ft² | 5,760 |
| 50 ft² | 7,200 |
| 75 ft² | 10,800 |
| 100 ft² | 14,400 |
| 250 ft² | 36,000 |
| 500 ft² | 72,000 |
| 1,000 ft² | 144,000 |

## How the conversion works

The relationship is in² = ft² × 144. Both units measure area, so the conversion is a fixed factor that never changes.

## Common questions

### How many square inches are in one square foot?

One square foot equals 144 square inches. in² = ft² × 144.

### How do you convert square feet to square inches?

Use in² = ft² × 144. So 10 ft² is 1,440 in².

### How many square feet are in one square inch?

One square inch equals 0.0069444 square feet, which is the reverse of the conversion above.

## Related pages

- [Square inches to Square feet](https://atoneplace.net/convert/square-inches-to-square-feet/)
- [Square feet to Square meters](https://atoneplace.net/convert/square-feet-to-square-meters/)
- [Square feet to Square kilometers](https://atoneplace.net/convert/square-feet-to-square-km/)
- [Square feet to Hectares](https://atoneplace.net/convert/square-feet-to-hectares/)
- [Square feet to Acres](https://atoneplace.net/convert/square-feet-to-acres/)
- [Square feet to Square miles](https://atoneplace.net/convert/square-feet-to-square-miles/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)