Millimeters to Inches Converter
Quick answer: To convert millimeters to inches, multiply by 0.03937008. For example, 10 mm is 0.3937008 in. One millimeter equals 0.03937008 in.
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Use the Millimeters to Inches Converter
Millimeters to Inches formula and what each symbol means
in = mm × 0.03937008
| Symbol | Meaning |
|---|---|
| mm | Millimeter |
| in | Inch |
Millimeters to Inches examples
1 mm
1 mm × 0.03937008 = 0.03937008 in.
10 mm
10 mm × 0.03937008 = 0.3937008 in.
100 mm
100 mm × 0.03937008 = 3.937008 in.
Millimeters compared with Inches
One in is 25.4 times as large as one mm, so your number gets smaller when you convert millimeters to inches and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About millimeters and inches
Millimeter (mm): One thousandth of a metre. Inch (in): The international inch, exactly 2.54 centimetres.
How to calculate Millimeters to Inches step by step
- Enter the value in mm (the starting unit).
- Multiply by 0.03937008, because 1 mm = 0.03937008 in.
- The product is the value in in. To go back, divide by 0.03937008 or multiply by 25.4.
Popular typography conversions
How to read your Millimeters to Inches result
Quick estimate: multiply by about 0.04 to get inches from millimeters; this is within 1.6% of the exact factor. In CSS, one inch is exactly 96 pixels, 72 points and 6 picas.
| MILLIMETERS | INCHES |
|---|---|
| 1 | 0.03937008 |
| 2 | 0.07874016 |
| 5 | 0.1968504 |
| 10 | 0.3937008 |
| 20 | 0.7874016 |
| 50 | 1.968504 |
| 100 | 3.937008 |
| 1,000 | 39.37008 |
Inches to Millimeters: quick table
| INCHES | MILLIMETERS |
|---|---|
| 1 | 25.4 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1,270 |
| 100 | 2,540 |
| 250 | 6,350 |
| 500 | 12,700 |
Common mistakes when calculating Millimeters to Inches
- Confusing a CSS pixel with a physical screen pixel; a CSS pixel is a reference unit of 1/96 inch.
- Dividing when you should multiply: from mm to in multiply by 0.03937008; from in to mm divide by 0.03937008.
Millimeters to Inches FAQ
How many in are in 1 mm?
1 mm equals 0.03937008 in.
How many mm are in 1 in?
1 in equals 25.4 mm.
Is 1 mm = 0.03937008 in an exact conversion?
The factor is shown rounded to 7 significant figures (0.03937008). The calculator above uses more digits.
What is a millimeter (mm)?
One thousandth of a metre.
How can I estimate millimeters to inches in my head?
Quick estimate: multiply by about 0.04 to get inches from millimeters; this is within 1.6% of the exact factor.
What is 60 mm in inches?
60 mm = 2.362205 in (since 60 × 0.03937008).
What is 250 mm in inches?
250 mm = 9.84252 in (since 250 × 0.03937008).
What is 7 mm in inches?
7 mm = 0.2755906 in (since 7 × 0.03937008).
How many decimals should I keep when converting mm to in?
Match the precision of your original measurement. For example, 0.3937008 in rounds to 0.394 in at 3 significant figures; keep more digits only for engineering or scientific work.
More in Typography converters
- Millimeters to Points Converter
- Inches to Pixels Converter
- Picas to Centimeters Converter
- Inches to Picas Converter
- Picas to Inches Converter
- Picas to Millimeters Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: W3C CSS Values and Units: absolute lengths (1in = 96px = 72pt = 6pc)