How many inches are in 1 foot?

1 ft equals 12 in. This is an exact conversion factor defined by NIST.

How do I convert feet to inches?

Multiply the value in ft by the conversion factor. For example, 10 ft = 120 in. Use our calculator above for instant results.

Is the feet to inches conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert feet to inches offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between feet and inches?

Feet (ft) and Inches (in) are both units of length but belong to different measurement systems. 1 ft = 12 in. Use the converter above to switch between them instantly.

Feet to Inches (ft → in) — Free Online Converter

ft → in Reference Table

ft	in
0.001 ft	0.012 in
0.002 ft	0.024 in
0.003 ft	0.036 in
0.004 ft	0.048 in
0.005 ft	0.06 in
0.006 ft	0.072 in
0.007 ft	0.084 in
0.008 ft	0.096 in
0.009 ft	0.108 in
0.01 ft	0.12 in
0.02 ft	0.24 in
0.03 ft	0.36 in
0.04 ft	0.48 in
0.05 ft	0.6 in
0.06 ft	0.72 in
0.07 ft	0.84 in
0.08 ft	0.96 in
0.09 ft	1.08 in
0.1 ft	1.2 in
0.2 ft	2.4 in
0.3 ft	3.6 in
0.4 ft	4.8 in
0.5 ft	6 in
0.6 ft	7.2 in
0.7 ft	8.4 in
0.8 ft	9.6 in
0.9 ft	10.8 in
1 ft	12 in
1.5 ft	18 in
2 ft	24 in
2.5 ft	30 in
3 ft	36 in
3.5 ft	42 in
4 ft	48 in
4.5 ft	54 in
5 ft	60 in
5.5 ft	66 in
6 ft	72 in
6.5 ft	78 in
7 ft	84 in
7.5 ft	90 in
8 ft	96 in
8.5 ft	102 in
9 ft	108 in
9.5 ft	114 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
25 ft	300 in
30 ft	360 in
35 ft	420 in
40 ft	480 in
45 ft	540 in
50 ft	600 in
55 ft	660 in
60 ft	720 in
65 ft	780 in
70 ft	840 in
75 ft	900 in
80 ft	960 in
85 ft	1020 in
90 ft	1080 in
95 ft	1140 in
100 ft	1200 in
120 ft	1440 in
125 ft	1500 in
130 ft	1560 in
140 ft	1680 in
150 ft	1800 in
160 ft	1920 in
175 ft	2100 in
180 ft	2160 in
200 ft	2400 in
225 ft	2700 in
250 ft	3000 in
275 ft	3300 in
300 ft	3600 in
350 ft	4200 in
400 ft	4800 in
450 ft	5400 in
500 ft	6000 in
600 ft	7200 in
700 ft	8400 in
750 ft	9000 in
800 ft	9600 in
900 ft	10800 in
1000 ft	12000 in
1200 ft	14400 in
1250 ft	15000 in
1500 ft	18000 in
1750 ft	21000 in
2000 ft	24000 in
2500 ft	30000 in
3000 ft	36000 in
4000 ft	48000 in
4500 ft	54000 in
5000 ft	60000 in
6000 ft	72000 in
7000 ft	84000 in
7500 ft	90000 in
8000 ft	96000 in
9000 ft	108000 in
10000 ft	120000 in
15000 ft	180000 in
20000 ft	240000 in
25000 ft	300000 in
50000 ft	600000 in
75000 ft	900000 in
100000 ft	1200000 in

Values based on NIST SP 811 conversion factors

Why Convert Feet to Inches?

Converting between feet (ft) and inches (in) is one of the most common length conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert ft to in saves time and prevents errors.

Length conversions between ft and in are fundamental in construction, manufacturing, and international trade. Architects rely on precise conversions when adapting building plans between metric and imperial standards — a 1% error on a 30-meter wall translates to 30 cm of misalignment. Travelers frequently convert between kilometers and miles for road trips, while online shoppers need length conversions to verify clothing sizes, furniture dimensions, and screen diagonals across international retailers. In athletics, track distances (100m, 1500m, marathon) must be precisely converted for record comparisons across different measurement traditions.

How to Convert Feet to Inches

To convert feet to inches, use the following formula:

in = ft × 12

Example: 1 ft = 12 in

For example, 5 ft = 60 in, 10 ft = 120 in, and 100 ft = 1200 in. For larger values, 1000 ft = 12000 in. Conversely, 1 in = 0.08333333333 ft. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Use Cases

Average male height (5 ft 10 in): 5.8 ft = 69.6 in
Standard interior door height (6 ft 8 in): 6 ft = 72 in
Child's height (about 4 feet): 4 ft = 48 in
Standard desk width depth (2 ft): 2 ft = 24 in

Common Mistakes to Avoid

Confusing similar units: confusing nautical miles with regular miles, or yards with meters.
Decimal errors: moving the decimal point the wrong way (e.g., 100 cm = 1 m, not 10 m).
Approximation: assuming an inch is exactly 2.5 cm (it's 2.54 cm).

Pro Tips

Use 'approx' for mental math: 1 km is roughly 0.6 miles (or 2/3 for quick estimates).
Visualize: A meter is about a guitar length; an inch is a thumb width.
Ruler check: Most rulers show cm and inches together—great for quick checks.

What is a Foot?

The foot (ft) is a unit of length in the Imperial and US customary systems. It is historically based on the human foot size. Since the International Yard and Pound Agreement of 1959, one foot has been exactly defined as 0.3048 meters.

Feet are primarily used in the United States, United Kingdom, and Canada. Common applications include measuring height, building dimensions, real estate, and aviation altitude.

What is a Inch?

The inch (in) is a unit of length in the Imperial and US customary systems. Historically defined as the width of a thumb or three barleycorns, it is now exactly defined as 25.4 millimeters (0.0254 meters) since 1959.

Inches are widely used in the US, UK, and Canada for short lengths. Common uses include screen sizes (TVs, monitors), pipe diameters, and paper sizes.

Feet → Inches

Feet to Inches Formula