OmniConvert
Length • NIST Exact

Feet → Inches

ft → in

1 ft = 12 in• NIST Exact

ft → in Reference Table

ft in
0.01 ft 0.12 in
0.1 ft 1.2 in
0.5 ft 6 in
1 ft 12 in
2 ft 24 in
5 ft 60 in
10 ft 120 in
20 ft 240 in
50 ft 600 in
100 ft 1200 in
500 ft 6000 in
1000 ft 12000 in

Values based on NIST SP 811 conversion factors

🌍 Real-World Examples

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

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 essential in international travel, construction, and sports. Airline carry-on luggage limits are typically defined in centimeters (55×40×20 cm), but US travelers think in inches. Architects and contractors regularly convert between metric and imperial measurements when working on international projects. In athletics, track distances may be in meters while road races use miles or kilometers.

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. 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: Don't mix up meters (m) with miles (mi) — they differ by a factor of ~1600. Always check the unit symbol.
  • Rounding too early: When converting ft to in, carry at least 4 decimal places in intermediate calculations to avoid compounding errors.
  • Forgetting unit labels: Always write the unit symbol after the number. "5.5" is ambiguous — "5.5 in" is clear.

Pro Tips

  • Memorize the factor: 1 ft = 12 in. For quick mental math, remember this base conversion.
  • Quick reference: 5 ft = 60 in · 10 ft = 120 in · 25 ft = 300 in · 50 ft = 600 in · 100 ft = 1200 in
  • Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.

Feet to Inches Conversion Table

ftin
0.01 ft0.12 in
0.1 ft1.2 in
0.5 ft6 in
1 ft12 in
2 ft24 in
5 ft60 in
10 ft120 in
20 ft240 in
50 ft600 in
100 ft1200 in
500 ft6000 in
1000 ft12000 in

All values in this table are mathematically exact per NIST SP 811.

Frequently Asked Questions

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).

Length More Conversions

m → ft ft → m cm → in in → cm km → mi mi → km mm → in in → mm m → yd yd → m in → ft 里 → km km → 里 尺 → m m → 尺