Millimeters to Inches Converter

Millimeters to inches matters for tools, drill bits, bolts, jewelry and rainfall totals. There are exactly 25.4 mm in one inch.

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0.19685

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How to use the Millimeters to Inches Converter

  1. Type the number of millimeters in the box
  2. The value in inches appears instantly
  3. Use the table for common values, or switch units to convert anything else

Millimeters to Inches formula

in = mm × 0.0393700787

Example: 5 mm × 0.039370079 = 0.19685 in.

💡 Common fractions: 3 mm ≈ 1/8", 6 mm ≈ 1/4", 12.7 mm = 1/2", 19 mm ≈ 3/4".

Millimeters to Inches conversion chart

MillimetersInches
1 mm0.0393701 in
2 mm0.0787402 in
3 mm0.11811 in
5 mm0.19685 in
6 mm0.23622 in
8 mm0.314961 in
10 mm0.393701 in
12 mm0.472441 in
12.7 mm0.5 in
15 mm0.590551 in
19 mm0.748031 in
20 mm0.787402 in
25 mm0.984252 in
50 mm1.9685 in

Frequently asked questions

How do I convert millimeters to inches?

Use the formula in = mm × 0.0393700787. For example, 5 mm = 0.19685 in.

How many inches are in 1 millimeter?

1 mm = 0.039370079 in.

Any handy reference points?

Common fractions: 3 mm ≈ 1/8", 6 mm ≈ 1/4", 12.7 mm = 1/2", 19 mm ≈ 3/4".

Is this millimeters to inches converter accurate?

Yes. It uses exact definitions (for example, 1 inch = 2.54 cm and 1 lb = 0.45359237 kg) and shows up to 10 significant digits.

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