Convert Foot to Inch (ft → in)

The foot is the standard unit for human height, building floor counts, and aviation altitudes worldwide.

Foot

Inch

1 ft12 inNIST · BIPM accuracy

Foot to Inch Conversion Table

10 common values

Foot	Inch
1 ft	12 in
5 ft	60 in
10 ft	120 in
25 ft	300 in
50 ft	600 in
100 ft	1,200 in
250 ft	3,000 in
500 ft	6,000 in
1,000 ft	12,000 in
5,000 ft	60,000 in

How to Convert Foot to Inch Manually

Step by Step

Converting feet to inches is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1
Take your value in feet
Start with the number of feet (ft) you want to convert.
2
Multiply by 12
The conversion factor from ft to in is 12. Multiply your value by this number.
3
Read the result in inches
The result is your value in inches (in).

Practical Examples

1 ft

equals

12 in

5 ft

equals

60 in

10 ft

equals

120 in

25 ft

equals

300 in

100 ft

equals

1,200 in

Formula

Multiply the value in feet by 12. For the reverse direction, multiply by 0.083333.

Forwardin = ft × 12

Reverseft = in × 0.083333

Example: 10 ft × 12 = 120 in

Tips

Use these in everyday conversions

1 foot = 12 inches = 30.48 cm exactly. Knowing feet gives you inches instantly.
For a quick metric estimate, multiply feet by 0.3 — 10 ft ≈ 3 m.
Pilots and air-traffic control use feet globally, even over metric countries.

Common Mistakes

Avoid these

Writing "6.2 ft" to mean "6 feet 2 inches" — the decimal form is 6.167 ft, not 6.2.
Confusing feet (length) with square feet (area) in US real-estate listings.
Using 0.3 instead of 0.3048 on structural drawings — errors accumulate on multi-storey buildings.

About Foot and Inch

What is the Foot?

The foot equals exactly 0.3048 meters or 12 inches under the 1959 international agreement. The unit's name reflects its ancient origin as the length of an adult human foot, with measurements varying by region — from 250 mm to over 330 mm — until standardization. The foot is the dominant unit for human height in the United States and the United Kingdom (a person is described as '5 ft 10 in' rather than 178 cm), for building heights, and for aviation altitudes (worldwide aircraft fly at altitudes given in feet, even in metric countries). It remains the standard for residential floor counts, ceiling heights, and ladder ratings. The foot relates to the meter (1 ft ≈ 0.305 m), the yard (3 ft = 1 yd), and the mile (5,280 ft = 1 mi).

Aircraft cruising altitude in international aviation
US building heights, ceiling heights and room dimensions
Mountain elevations on global maps (Everest = 29,032 ft)

Real-world examples

Airliners cruise at 35,000 ft (10.7 km). Mount Everest is 29,032 ft (8,849 m). A standard US ceiling is 8 ft (2.44 m).

What is the Inch?

The inch equals exactly 25.4 millimeters under the 1959 international yard and pound agreement. The word derives from the Old English 'ynce,' from Latin 'uncia' meaning one twelfth (the inch is one twelfth of a foot). Originally based on the width of a thumb, the inch has been standardized for centuries. It is the global standard for screen sizes (a 15-inch laptop or 65-inch TV), pipe and tubing diameters (1-inch plumbing, 2-inch exhaust), and shoe sizes in Anglo-Saxon countries. Construction lumber, photographic prints, paper sizes (US Letter is 8.5 × 11 in), and rainfall in the US all use inches. The inch relates to the millimeter (25.4 mm = 1 in exactly), the foot (12 in = 1 ft), and the yard (36 in = 1 yd). Subdivisions in fractions (½, ¼, ⅛) remain common in carpentry.