Type a measurement below. Every other unit updates as you type.
The converter handles millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. It also accepts fractions, so you can enter 3/8 or 1 1/2 exactly as they appear on a tape measure.
Universal Length Converter
Type a number. Every unit updates as you go.
Enter a number to convert.
What that looks like
How to use it
- Type any number in the amount box.
- Pick the unit you are starting from.
- Read the answer in every other unit at once.
- Fractions work too. Try 5/8 or 2 3/4.
- The ruler line shows the nearest sixteenth of an inch.
Common Length Conversions
These are the conversions people look up most often.
| From | To | Exact value |
|---|---|---|
| 1 inch | Centimetres | 2.54 cm |
| 1 inch | Millimetres | 25.4 mm |
| 1 foot | Centimetres | 30.48 cm |
| 1 foot | Metres | 0.3048 m |
| 1 yard | Metres | 0.9144 m |
| 1 metre | Inches | 39.3701 in |
| 1 metre | Feet | 3.28084 ft |
| 1 centimetre | Inches | 0.393701 in |
| 1 mile | Kilometres | 1.609344 km |
Inches to Centimetres at a Glance
| Inches | Centimetres | Millimetres |
|---|---|---|
| 1 in | 2.54 cm | 25.4 mm |
| 2 in | 5.08 cm | 50.8 mm |
| 4 in | 10.16 cm | 101.6 mm |
| 6 in | 15.24 cm | 152.4 mm |
| 8 in | 20.32 cm | 203.2 mm |
| 10 in | 25.4 cm | 254 mm |
| 12 in | 30.48 cm | 304.8 mm |
| 14 in | 35.56 cm | 355.6 mm |
| 18 in | 45.72 cm | 457.2 mm |
| 20 in | 50.8 cm | 508 mm |
Questions People Ask
How many centimetres are in an inch?
There are exactly 2.54 centimetres in one inch. The figure is defined, not measured, so it never changes.
Can I type a fraction?
Yes. Enter 3/8 for three eighths. Enter 1 1/2 for one and a half. Both work.
What does the ruler line mean?
It rounds your measurement to the nearest sixteenth of an inch. That is the smallest mark on most tape measures.
Is a metre longer than a yard?
Yes, slightly. One metre is 1.0936 yards, so it is about 3.4 inches longer.