1 inch = 25.4 millimetres. To convert inches to millimetres, multiply by 25.4. To convert millimetres back to inches, multiply by 0.03937.
1 Inch (in) = 25.4 Millimetre (mm)
Inch to millimetres formula
Millimetres = inches × 25.4
Example: 5 inches = 5 × 25.4 = 127 millimetres.
Inch to millimetres conversion table
| Inches | Millimetres |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 10 | 254 |
| 15 | 381 |
| 20 | 508 |
| 25 | 635 |
| 50 | 1,270 |
| 100 | 2,540 |
Where this is used in property
Room sizes, ceiling heights, plot frontage and floor plans in India are usually written in feet and inches, while RERA documents and building plans use metres. Converting correctly helps you check carpet area and room dimensions before you buy or rent.
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Frequently asked questions
How many millimetres are in 1 inch?
1 inch is 25.4 millimetres.
How do I convert inches to millimetres?
Multiply the number of inches by 25.4. For example, 5 inches = 127 millimetres.
How many inches make 1 millimetre?
1 millimetre is 0.03937 inches.
Is this converter exact?
Yes. 1 inch is exactly 2.54 cm and 1 foot is exactly 0.3048 m, so the results are exact up to rounding.
