Inches to Millimeters
Convert Inches to Millimeters
"Inches to Millimeters" Calculator
How to convert inches to millimeters
Worked example: 1.25″ = 31.75 mm
1.25″ × 25.4 = 31.75 mm
Rule: millimeters = inches × 25.4 — exact: 1 in = 25.4 mm.
See Also
- Inches to Meters - Convert Inches to Meters
- Meters to Inches - Convert Meters to Inches
- Millimeters to Inches - Convert Millimeters to Inches
- Inches to Centimeters - Convert Inches to Centimeters
- Centimeters to Inches - Convert Centimeters to Inches
- Fractional Inches to Millimeters - Convert Fractional Inches to Millimeters
- Millimeters to Fractional Inches - Convert Millimeters to Fractional Inches
- Mm to Cm - Convert Millimeters to Centimeters
- Cm to Mm - Convert Centimeters to Millimeters
- Cm to M - Convert Centimeters to Meters
- M to Cm - Convert Meters to Centimeters
FAQ
How many mm is 1 inch?
One inch equals exactly 25.4 millimeters (1 in = 25.4 mm).
What is the formula to convert inches to mm?
To convert inches to millimeters, multiply the inch value by 25.4. For example, 12 inches × 25.4 = 304.8 mm.
How many inches are in a millimeter?
One millimeter ≈ 0.0393701 inches — the reciprocal of the 25.4 mm-per-inch definition.