15 in to cm — 15 inches in centimetres
Exact 15 × 2.54 = 38.1
38 centimetres 1 millimetre
15 inches in other units
| Nanometres | 381,000,000 | nm |
|---|---|---|
| Micrometres | 381,000 | µm |
| Millimetres | 381 | mm |
| Centimetres | 38.1 | cm |
| Metres | 0.381 | m |
| Kilometres | 0.000381 | km |
| Feet | 1.25 | ft |
| Yards | 0.41666667 | yd |
| Miles | 0.000236742424 | mi |
| Nautical miles | 0.000205723542 | nmi |
in to cm at a glance
| Inches | Centimetres |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
| 250 in | 635 cm |
| 500 in | 1,270 cm |
| 1,000 in | 2,540 cm |
How to convert inches to centimetres
Multiply by 2.54 — one inch is 2.54 centimetres. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 15 × 2.54 = 38.1
In words: about thirty-eight centimetres.
What these units are
The inch and the centimetre are covered in the length unit guide, along with every other unit on this page.
Questions
How many centimetres are in a inch?
One inch is 2.54 centimetres. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 15 inches in centimetres?
15 inches is 38.1 centimetres. The working is 15 × 2.54 = 38.1.
Is an inch exactly 2.54 centimetres?
Yes, exactly. Since 1959 the international inch has been defined as 25.4 millimetres, so the figure is a definition rather than a measurement. Every foot, yard and mile figure on this page follows from it and is equally exact.
Why is a nautical mile different from a mile?
It is tied to the Earth rather than to a body part. One nautical mile is one minute of latitude, fixed at exactly 1,852 metres, which makes chart work straightforward for anyone navigating by degrees.
How do I write my height in metric?
Convert the whole thing to inches first, then multiply by 2.54. Five foot ten is 70 inches, which is 177.8 cm. Converting the feet and the inches separately is where the arithmetic usually goes wrong.
Meter or metre?
Both name the same unit. "Metre" is the international spelling used by the SI and most English-speaking countries; "meter" is standard in the United States. Either spelling will find this page.