Inches: conversions & definition
The international inch is exactly 0.0254 meters. Enter 2.5 for two and a half inches.
Choose the unit you need
Each row converts one in. Open a converter to enter any value and see its formula, worked example and reference table. Results below are rounded to 10 significant digits.
| Convert to | Equivalent value | Calculator |
|---|---|---|
| Millimeters (mm) | ≈ 25.4 | Convert in to mm |
| Centimeters (cm) | ≈ 2.54 | Convert in to cm |
| Meters (m) | ≈ 0.0254 | Convert in to m |
| Kilometers (km) | ≈ 0.0000254 | Convert in to km |
| Feet (ft) | ≈ 0.08333333333 | Convert in to ft |
| Yards (yd) | ≈ 0.02777777778 | Convert in to yd |
| Miles (mi) | ≈ 0.00001578282828 | Convert in to mi |
| Nautical miles (nmi) | ≈ 0.00001371490281 | Convert in to nmi |
Keep the quantity consistent
Choose units that represent the same quantity and preserve the measurement conditions. A scale conversion changes the number and unit together; it does not change the physical amount or improve the accuracy of your measurement.
Explore the complete learning library →