Convert inches to millimeters
Instantly convert inches to millimeters using our free online calculator. See the formula and a full reference table below.
1 inch = 25.4 millimeters
Formula:
inches × 25.4 = millimetersInch → Millimeter reference table
| inches | millimeters |
|---|---|
| 1 inch | 25.4 millimeters |
| 2 inches | 50.8 millimeters |
| 5 inches | 127 millimeters |
| 10 inches | 254 millimeters |
| 25 inches | 635 millimeters |
| 50 inches | 1270 millimeters |
| 100 inches | 2540 millimeters |
| 250 inches | 6350 millimeters |
| 500 inches | 12700 millimeters |
| 1000 inches | 25400 millimeters |
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Frequently asked questions
How many millimeters are in 1 inch?
1 inch equals 25.4 millimeters.
What is the formula to convert inches to millimeters?
Multiply the number of inches by 25.4 to get the equivalent in millimeters.
Is this converter accurate?
Yes. All conversions use internationally recognized conversion factors with up to 6 decimal places of precision.