Millimeters and Inches (mm & in) Converter
Use this tool to convert quickly between millimeters/millimetres and inches (mm and in), or vice-versa, with results given as both decimal and fraction. If you're converting mm to inches, you can choose to have a fraction result in 1/16, 1/32 and 1/64 inch if you wish.
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How many inches in a mm?
1mm = 0.03937008 inches. To convert mm to inches you need to divide your figure by 25.4.
mm to inches as fraction
The converter on this page allows you to show results as fractions in 1/16, 1/32 and 1/64 inch for millimeter to inch conversions. It is important to note that when you choose this option, the converter will round (up or down) and give you a remainder figure (the difference between the fraction and the full result). For this reason, the fraction result will be slightly smaller or slightly larger.
How many mm in an inch?
1 inch = 25.4mm. To convert inches to millimeters multiply your figure by 25.4. The chart below shows some example conversions, rounded to a maximum of 4 decimal places. Should you wish to convert between centimeters and inches, give the cm to inches converter a try.
How many mm in an inch and a half?
1 1/2 inches = 38.1 mm. To get this answer, we simply multiply: 25.4 × 1.5.
Millimeters and inches conversion charts
The chart below shows the conversion between millimeters and inches, rounded to a maximum of 4 decimal places (first table) and 3 decimal places (second table).
|Millimeters||Inches (decimal)||Inches (fraction approx)|
|1mm||0.0394 in||1/32 inch|
|30mm||1.1811 in||1 3/16|
|40mm||1.5748 in||1 37/64|
|50mm||1.9685 in||1 31/32|
|60mm||2.3622 in||2 23/64|
|70mm||2.7559 in||2 3/4|
|80mm||3.1496 in||3 5/32|
|90mm||3.5433 in||3 35/64|
|100mm||3.937 in||3 15/16|
Note: fraction figures for inches are approximate.
|1/64 inch||0.397 mm||1/32 inch||0.794 mm|
|1/16 inch||1.588 mm||0.1 inch||2.54 mm|
|1/8 inch||3.175 mm||1/4 inch||6.35 mm|
|1/2 inch||12.7 mm||3/4 inch||19.05 mm|
|1 inch||25.4 mm||5 inches||127 mm|
|10 inches||254 mm||20 inches||508 mm|
|30 inches||762 mm||40 inches||1016 mm|
|50 inches||1270 mm||60 inches||1524 mm|
|70 inches||1778 mm||80 inches||2032 mm|
|90 inches||2286 mm||100 inches||2540 mm|
Note: conversions are rounded to maximum 3 decimal places.
My conversion tool can help you convert between millimeters and inches. Should you wish to convert between inches and centimeters, see the inches and cm converter. For other units of height, you may wish to use the height calculator here.
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