Inches to Meters Converter
Convert inches to meters for engineering, height, and international measurements.
How It Works
Formula: in to m = value × 0.0254
Example: 5.7 in = 0.14478 m
Note: 1 inch equals 0.0254 meters.
Common Uses
Quick Conversion Table
| in | m |
|---|---|
| 1 | 0.0254 |
| 5 | 0.127 |
| 10 | 0.254 |
| 50 | 1.27 |
| 100 | 2.54 |
| 500 | 12.7 |
| 1000 | 25.4 |
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 m
Precision Guidance
For engineering, keep 3-4 decimals.
Common Mistakes
Do not confuse inches with centimeters (1 in = 2.54 cm = 0.0254 m).
Frequently Asked Questions
What is 1 inch in meters?
1 inch equals exactly 0.0254 meters by international definition (since 1959).
How do I convert inches to meters?
Multiply the inch value by 0.0254. For example, 10 in × 0.0254 = 0.254 m.
How many meters is 5.7 inches?
5.7 inches equals 0.1448 meters (5.7 × 0.0254 = 0.14478 m).
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Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 inch (in) = 25.4 millimetres (exact)
- EXACT1 foot (ft) = 0.3048 metres (exact, 12 in)
- EXACT1 yard (yd) = 0.9144 metres (exact, 3 ft)
- EXACT1 mile (mi) = 1609.344 metres (exact, 5280 ft)
- EXACT1 centimetre (cm) = 0.01 metre (definition)
Common Pitfalls & How to Avoid Them
US survey foot is deprecated
The old US survey foot (0.304800609601 m) was retired in 2023 in favor of the international foot (0.3048 m). Modern conversions use the international foot; mixing them drifts over long distances.
Inches vs. centimetres for screens
Display and wheel sizes are often rounded to the nearest convenient number; a "27-inch" monitor is nominal, not a precise 68.58 cm panel.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
- BIPM (International Bureau of Weights and Measures) — SI Brochure — The International System of Units (9th edition)
Last Updated 2026 | This converter was reviewed for accuracy