Convert feet to inches in seconds - enter a value and get the result without manual math. Our converter calculator applies the correct factor automatically, so you avoid slip-ups and save time on every calculation. We built it for speed and clarity. Start converting now.

How the foot to inch formula works precisely

The conversion ratio is fixed: 1 foot equals 12 inches. That constant follows the International Yard and Pound Agreement of 1959, where 1 ft equals exactly 0.3048 m and 1 in equals 25.4 mm. Use the formula: inches = feet × 12. Type 15 ft and you see 180 in instantly - no extra steps. We rely on standardized coefficients to keep results consistent across the site. Check the table below when you prefer quick lookups.

When to use this length conversion tool

Use it whenever a quick length conversion removes ambiguity:

Height and apparel sizing: 5 ft 10 in translates to 70 inches.
Construction and remodeling: Lumber often comes in 8, 10, 12, and 16 ft; multiplying by 12 keeps cut lists correct.
Field notes with decimals: 5.5 ft becomes 66 inches.
Small increments: 0.1 ft becomes 1.2 inches.

Forgetting to multiply by 12 is the common pitfall - the result ends up off by a factor of twelve. Convert quickly and move on.

One platform for more than just length conversions

all-metrics.com hosts a wide library of unit tools across length, mass, volume, temperature, speed, pressure, and more. You get results in the browser, from any device, free of charge. No software to install and no registration required. We keep the interface straightforward: choose units, enter a number, and the result appears right away.

Quick steps to get a precise result

Enter the value in feet (ft).
The tool applies ×12 automatically and shows inches (in).
Review the number of significant digits you need, then copy or reuse it.
Cross-check with the table for common benchmarks when needed.

Need to reverse the direction? Divide inch values by 12 to find feet. That's it - clean, reliable, and ready for your next calculation. Convert now.

Feet	Inches
1 ft	12 in
2 ft	24 in
3 ft	36 in
4 ft	48 in
5 ft	60 in
6 ft	72 in
7 ft	84 in
8 ft	96 in
9 ft	108 in
10 ft	120 in
11 ft	132 in
12 ft	144 in
13 ft	156 in
14 ft	168 in
15 ft	180 in
16 ft	192 in
17 ft	204 in
18 ft	216 in
19 ft	228 in
20 ft	240 in
50 ft	600 in
100 ft	1200 in