mm to Inches Converter
1 inch = 25.4 mm exactly (internationally defined). Essential for metric-to-imperial engineering conversions.
Formula:1 in = 25.4 mm
Quick conversion table — Millimeter to Inch
0.5 mm0.019685 in
1 mm0.0393701 in
2 mm0.0787402 in
5 mm0.19685 in
10 mm0.393701 in
20 mm0.787402 in
50 mm1.9685039 in
100 mm3.9370079 in
500 mm19.685039 in
1,000 mm39.370079 in
How to convert mm to in
To convert mm to inches, use the formula: 1 in = 25.4 mm. Simply enter the value you want to convert in the field above and the result appears instantly. You can also type in the result field to reverse the conversion.
All conversions use precise mathematical constants validated against international SI standards (NIST and ISO 80000). Results are accurate to 8 significant figures.
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