Convert inches to millimeters
1 inch equals 25.4 millimeters. To convert inches to millimeters, multiply the value by 25.4; divide to go the other way. Use the calculator for any amount or check the chart with the most searched values.
Formula
mm = in × 25.4Settings
Conversion
Official SI and imperial system factors.
Result
1 in =
25.4 mm
Millimeter
All equivalents in length
25.4 mmMillimeter
2.54 cmCentimeter
1 inInch
0.08333333 ftFoot
0.02777778 ydYard
0.0254 mMeter
0.0000254 kmKilometer
0.00001578 miMile
Inches to millimeters conversion chart
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 7 | 177.8 |
| 8 | 203.2 |
| 9 | 228.6 |
| 10 | 254 |
| 15 | 381 |
| 20 | 508 |
| 25 | 635 |
| 30 | 762 |
| 40 | 1,016 |
| 50 | 1,270 |
| 75 | 1,905 |
| 100 | 2,540 |
| 250 | 6,350 |
| 500 | 12,700 |
| 1,000 | 25,400 |
How many millimeters are in 1 inch?
1 inch (in) equals 25.4 millimeters (mm).
How do you convert inches to millimeters?
Multiply the number of inches by 25.4. For example, 10 in = 254 mm.
Popular lookups
km → mimi → kmm → ftft → mcm → inin → cmmm → inm → ydyd → mft → cmcm → ftkm → mm → kmm → cmcm → mkg → lblb → kgg → ozoz → gkg → gg → kgt → kgkg → tst → kgkg → stlb → ozoz → lbL → galgal → LmL → fl ozfl oz → mLL → mLmL → Lm³ → LL → m³cL → mLmL → cLm² → ft²ft² → m²ha → acac → haha → m²m² → hakm² → haha → km²m² → cm²cm² → m²