Convert cm to inches
Centimetres are already set as the starting unit. Type a length and the inches update as you type.
- Runs on your device
- No sign-up
- Works offline after a visit
| Unit | Value |
|---|
This page opens the length converter with centimetres as the starting unit and inches as the target. The inch figure, the formula and a table of other length units update as you type. The swap button reverses the pair, so inches to centimetres is one press away.
Divide centimetres by 2.54, because one inch is exactly 2.54 cm. A length of 30 cm is about 11.81 in, and 100 cm is about 39.37 in. For a figure already in inches, use inches to cm.
| cm | in |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.874 in |
| 30 cm | 11.811 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
| 150 cm | 59.0551 in |
| 180 cm | 70.8661 in |
| 200 cm | 78.7402 in |
How to convert units
- Pick a category, such as length or volume.
- Type the value and choose the unit it is in.
- Read the answer, or scan the table for every other unit.
Questions
How many inches is 30 cm?
30 cm is about 11.81 inches. Each centimetre is about 0.3937 inches, so a single centimetre is a little under half an inch.
Is the centimetre to inch conversion exact?
Yes. The inch is defined as exactly 2.54 cm, so the factor adds no error. Any difference you notice comes from how many decimal places you choose to read.
How do I convert miles to kilometres?
Multiply the miles by 1.609344. A mile is exactly 1,609.344 metres, so 10 miles is 16.09344 km.
Why are US and UK gallons different?
A US gallon is 3.785411784 litres and a UK (imperial) gallon is 4.54609 litres. The UK gallon is about 20% bigger, so the same volume is a smaller number of UK gallons.
What is the difference between KB and KiB?
A kilobyte (KB) is 1,000 bytes and a kibibyte (KiB) is 1,024 bytes. Some operating systems show binary sizes with the decimal label, so a 1 TB drive can be reported as about 931 GB.
Is a cup 236.6 ml or 240 ml?
Both are used. The US customary cup is 236.6 ml, or 8 US fluid ounces. Nutrition labels use a 240 ml cup, which is about 1.4% larger, so check which one a recipe means.
Reviews
No reviews yet. Be the first.