How to Convert Inches to Metres (in to m)
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles. This guide shows how to convert inches into metres by hand, with examples and a quick-reference table.
The conversion
To convert inches to metres, multiply the value by 0.0254. To go the other way, divide by the same number (or multiply by 39.3700787402). For a quick estimate, multiply by about 0.025.
Metres = inches × 0.0254
Worked examples
- 3 in = 0.0762 m
- 12.5 in = 0.3175 m
- 75 in = 1.905 m
Inches to Metres table
| Inches | Metres |
|---|---|
| 1 in | 0.0254 m |
| 2 in | 0.0508 m |
| 5 in | 0.127 m |
| 10 in | 0.254 m |
| 20 in | 0.508 m |
| 25 in | 0.635 m |
| 50 in | 1.27 m |
| 100 in | 2.54 m |
| 250 in | 6.35 m |
| 500 in | 12.7 m |
| 1,000 in | 25.4 m |
Common questions
Is in to m exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Metres to Inches converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the Inches to Metres Converter or browse all length converters.
Run your own numbers: Inches to Metres Converter