Inches to MM Converter
Type an amount in inches to see it in millimeters and other length units.
Result
1 in =
25.4 mm
| Unit | Value |
|---|---|
| Millimetre (mm) | 25.4 |
| Centimetre (cm) | 2.54 |
| Metre (m) | 0.0254 |
| Kilometre (km) | 0.0000254 |
| Foot (ft) | 0.08333333 |
| Yard (yd) | 0.02777778 |
| Mile (mi) | 0.00001578 |
How to use it
- Type the amount.
- Check the From and To units, or change them.
- Read the result. The table shows the same amount in other units.
About this tool
1 inch = 25.4 millimeters, so to convert inches to millimeters, multiply by 25.4. To go the other way, 1 millimeter = 0.03937008 inches.
One inch is defined as exactly 25.4 mm, so this conversion is exact.
Formula
- millimeters = inches × 25.4
- inches = millimeters × 0.03937008
in to mm conversion chart
| in | mm |
|---|---|
| 0.5 | 12.7 |
| 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 |
mm to in
| mm | in |
|---|---|
| 0.5 | 0.01968504 |
| 1 | 0.03937008 |
| 2 | 0.07874016 |
| 3 | 0.11811024 |
| 4 | 0.15748032 |
| 5 | 0.19685039 |
| 6 | 0.23622047 |
| 7 | 0.27559055 |
| 8 | 0.31496063 |
| 9 | 0.35433071 |
| 10 | 0.39370079 |
| 15 | 0.59055118 |
Examples
- 1 in = 25.4 mm
- 5 in = 127 mm
- 10 in = 254 mm
- 50 in = 1,270 mm
- 100 in = 2,540 mm
Tips
- One inch is defined as exactly 25.4 mm, so this conversion is exact.
- Use Swap units to convert the other way.
- Results are rounded for display. The exact factor is used in the calculation.
Questions and answers
How many millimeters are in 1 inch?
1 inch = 25.4 millimeters.
How many inches are in 1 millimeter?
1 millimeter = 0.03937008 inches.
How do I convert inches to millimeters?
Multiply the number of inches by 25.4.
Are my numbers saved or sent anywhere?
No. The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server.
More tools
- MM to Inches Converter
- Inches to CM Converter
- CM to Inches Converter
- Feet to CM Converter
- All unit converters
Privacy
The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server. For work where accuracy matters, such as medicine, engineering or cooking times, check against the official measurement.