Length converter
Type a length and pick its unit. See it in every other unit at once, or switch to height mode for feet and inches ↔ cm.
A length converter uses exact factors from NIST SP 811, such as 1 inch = 2.54 cm and 1 foot = 0.3048 m. A height of 5 ft 6 in is 167.64 cm.
Kilometres to miles
5 km = 3.106856 mi
| Millimetres | 50,00,000 mm |
|---|---|
| Centimetres | 5,00,000 cm |
| Metres | 5,000 m |
| Inches | 1,96,850.4 in |
| Feet | 16,404.2 ft |
| Yards | 5,468.066 yd |
| Miles | 3.106856 mi |
1 km = 0.6213712 mi.
Exact factors: 1 inch is 2.54 cm. Shown to 7 significant figures. Nothing you type is stored.
Converting your height for a health check? Use it in the BMI calculator, which takes feet and inches too.
How to use this length converter
- Type the length you have, such as 5 or 12.5. Commas are fine.
- Under From, pick the unit of that number, such as km or feet.
- Under To, pick the unit you want. The big number shows the answer. The table below it shows every other unit too.
- For a height like 5′6″, choose Height (ft + in ↔ cm). Type feet and inches to get cm, or type cm to get feet and inches. Tap Swap units to turn any answer around.
Length conversion formula
Result = V × (metres in one "from" unit) ÷ (metres in one "to" unit)
- V
- The length you type.
- 1 inch
- Exactly 0.0254 m, which is 2.54 cm.
- 1 foot
- Exactly 0.3048 m (12 inches).
- 1 yard
- Exactly 0.9144 m (3 feet). In India a yard is also called a gaj.
- 1 mile
- Exactly 1,609.344 m.
Every unit is turned into metres first, then into the unit you want. These factors are exact by definition, so the only rounding is in how many digits we show. We show up to 7 significant figures.
Worked examples
Kilometres to miles. One mile is 1,609.344 metres. So 5 km = 5 × 1,000 ÷ 1,609.344 = 3.106856 miles.
Feet to metres. One foot is 0.3048 m. So 6 ft = 6 × 0.3048 = 1.8288 m.
- Height
- 5 ft 6 in
- In inches
- 5 × 12 + 6 = 66 in
- In cm
- 66 × 2.54 = 167.64 cm
Going back from cm, divide by 2.54 to get inches, then by 12 for feet. 170 cm ÷ 2.54 = 66.9 inches, which is 5 ft 6.9 in.
Height chart: 4′10″ to 6′4″ in cm
Heights in feet and inches with the cm and metre values. Cm is rounded to one decimal place.
| Height | Centimetres | Metres | Inches |
|---|---|---|---|
| 4 ft 10 in (4′10″) | 147.3 cm | 1.47 m | 58 in |
| 4 ft 11 in (4′11″) | 149.9 cm | 1.50 m | 59 in |
| 5 ft 0 in (5′0″) | 152.4 cm | 1.52 m | 60 in |
| 5 ft 1 in (5′1″) | 154.9 cm | 1.55 m | 61 in |
| 5 ft 2 in (5′2″) | 157.5 cm | 1.57 m | 62 in |
| 5 ft 3 in (5′3″) | 160.0 cm | 1.60 m | 63 in |
| 5 ft 4 in (5′4″) | 162.6 cm | 1.63 m | 64 in |
| 5 ft 5 in (5′5″) | 165.1 cm | 1.65 m | 65 in |
| 5 ft 6 in (5′6″) | 167.6 cm | 1.68 m | 66 in |
| 5 ft 7 in (5′7″) | 170.2 cm | 1.70 m | 67 in |
| 5 ft 8 in (5′8″) | 172.7 cm | 1.73 m | 68 in |
| 5 ft 9 in (5′9″) | 175.3 cm | 1.75 m | 69 in |
| 5 ft 10 in (5′10″) | 177.8 cm | 1.78 m | 70 in |
| 5 ft 11 in (5′11″) | 180.3 cm | 1.80 m | 71 in |
| 6 ft 0 in (6′0″) | 182.9 cm | 1.83 m | 72 in |
| 6 ft 1 in (6′1″) | 185.4 cm | 1.85 m | 73 in |
| 6 ft 2 in (6′2″) | 188.0 cm | 1.88 m | 74 in |
| 6 ft 3 in (6′3″) | 190.5 cm | 1.91 m | 75 in |
| 6 ft 4 in (6′4″) | 193.0 cm | 1.93 m | 76 in |
Common length conversions
| From | To | Equals |
|---|---|---|
| 1 inch | cm | 2.54 cm |
| 1 foot | cm | 30.48 cm |
| 1 metre | feet | 3.28084 ft |
| 1 metre | inches | 39.37008 in |
| 1 km | miles | 0.6213712 mi |
| 1 mile | km | 1.609344 km |
| 1 yard (gaj) | metres | 0.9144 m |
| 100 cm | feet | 3.28084 ft |
Is a kilometre or a mile longer? A mile is longer. It is about 1.6 km. A 10 km run is about 6.2 miles.
Where the factors come from
- Inch, foot, yard and mile are defined in metres. Source: NIST SP 811, Appendix B.9.
- Metric units step by powers of ten: 10 mm in a cm, 100 cm in a metre, 1,000 m in a km.
Length converter FAQs
What is 5 ft 6 in in cm?
167.64 cm. 5 feet 6 inches is 66 inches, and each inch is 2.54 cm. Use height mode above for any other height.
How many feet are in 1 metre?
About 3.28084 feet. That is 3 feet and about 3.37 inches.
How do I convert cm to feet and inches?
Divide the cm by 2.54 to get inches. Divide the inches by 12. The whole number is feet; the remainder is inches. For example, 160 cm is 62.99 inches, which is 5 ft 3 in. Height mode does this for you.
Which is longer, a km or a mile?
A mile. One mile is 1.609344 km. One km is 0.6213712 miles.
Is a gaj the same as a yard?
Yes, in length a gaj is one yard, 0.9144 m. For land, a gaj means a square yard (9 sq ft). Use the land area converter for that.
How accurate is this converter?
The factors are exact. We round the answer you see to 7 significant figures, which is far finer than any tape measure.
Is my data saved?
No. Everything is worked out in your browser. Nothing you type is sent to us or stored. Your numbers go only into a link you choose to copy or share.
For general information only. Check critical measurements with a calibrated instrument.