Feet to Inches Converter

Multiplying feet by 12 gives the equivalent in inches. This conversion is the daily companion of US carpenters, plumbers, and DIY enthusiasts whenever a project plan expressed in feet needs to be marked, cut, or ordered in inch-level detail.

Feet (ft)

Inches (in)

Decimal places:

Looking for the reverse? Inches to Feet converter →

How to Convert Feet to Inches

To convert feet to inches, multiply the number of feet by 12.

Formula: in = ft × 12

Worked Examples

1 foot = 1 × 12 = 12 in
5 feet = 5 × 12 = 60 in
12 feet = 12 × 12 = 144 in
36 feet = 36 × 12 = 432 in

Why Convert Feet to Inches?

Converting wall heights or room widths from feet to inches before laying out tile or flooring patterns
Cutting lumber to inch-precise lengths from feet-based plans
Translating expressed heights (5'9", 6'0") into total inches for fitness, military, or medical records
Calculating window or door opening sizes in inches from rough feet-level architectural drawings

Feet to Inches Conversion Table

Feet (ft)	Inches (in)
0.01 ft	0.12 in
0.1 ft	1.2 in
0.25 ft	3 in
0.5 ft	6 in
0.75 ft	9 in
1 ft	12 in
1.5 ft	18 in
2 ft	24 in
2.5 ft	30 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
24 ft	288 in
30 ft	360 in
36 ft	432 in
48 ft	576 in
60 ft	720 in
72 ft	864 in
84 ft	1008 in
96 ft	1152 in
100 ft	1200 in
120 ft	1440 in
144 ft	1728 in
200 ft	2400 in
300 ft	3600 in
500 ft	6000 in
1000 ft	12000 in

What Is a Foot?

A foot is a unit of length equal to exactly 0.3048 meters (12 inches), defined in 1959 by international agreement.

The foot is one of the oldest units still in everyday use, with roots in ancient Greek, Roman, and medieval European measurement systems — each using a foot of slightly different length. The modern international foot was fixed at 0.3048 meters in 1959, while the US Survey foot persisted for geodetic work until being phased out at the end of 2022.

In everyday use: Feet are widely used to express human height, room dimensions, and ceiling heights in the United States and United Kingdom. The unit is standard in aviation for altitude (flight level 350 = 35,000 feet) and remains common in real estate listings, construction drawings, and outdoor distance estimates.

The foot symbol is ft.

What Is an Inch?

An inch is a unit of length equal to exactly 25.4 millimeters, defined in 1959 as part of the international yard and pound agreement.

The inch traces back to early English measurement, originally tied to the width of a human thumb or three barleycorns laid end-to-end. After centuries of regional variation, the international inch was standardized in 1959 by an agreement among English-speaking countries to exactly 25.4 millimeters, replacing the slightly different US survey inch for most purposes.

In everyday use: Inches are the standard unit for screen sizes (a 15-inch laptop), TV diagonals, paper formats in the US, plumbing pipe diameters, and clothing dimensions like waistlines and shoe insoles. They remain dominant in US construction, woodworking, and any industry that grew around imperial drawings.

The inch symbol is in.

Precision and Accuracy

Exactly 12 inches per foot — a defined ratio within the imperial system. Multiplying is exact; any displayed decimal places reflect formatting choices, not measurement loss.

For most everyday purposes — recipes, room sizing, shopping — four decimal places of precision are more than enough. Engineering and scientific work may require additional digits or scientific notation for very small or very large results.

Common Feet to Inches Conversions

1 feet to in 2 feet to in 3 feet to in 4 feet to in 5 feet to in 6 feet to in 7 feet to in 8 feet to in 9 feet to in 10 feet to in 11 feet to in 12 feet to in 15 feet to in 20 feet to in

References

National Institute of Standards and Technology (NIST) — SI Units: Length
International Bureau of Weights and Measures (BIPM) — The International System of Units (SI)