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Take out a ruler with English and metric units. Draw one inch on a piece of paper with a pen. Now turn to the other side of the ruler and read how long your line is. It should be around 2.5 cm. If you were able to refine your measurement (say with a vernier caliper) you would see that your line would be 2.54 cm (or 25.4 mm).

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โˆ™ 2011-03-24 13:01:27
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Q: Why does an inch equal 25.4 mm?
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Related questions

10 inch is equal to how much mm?

1 in = 25.4 mm 10 in = 254 mm


How many mm to inch?

254


223 mm is how many inches?

1 inch is equal to 2.54 centimeters or 254 mm so 223mm would be 0.88 inches


How many mm is 254 cm?

1 cm equals 10 mm there for 254 cm equal 2,540 mm


7.5 mm equals what fraction of an inch?

1 inch is 25.4 mm 7.5 mm = 7.5/25.4 = 75/254 inch


How many inches is equal to 254 centimeters?

There are 2.54 centimetres in one inch. Therefore, 254 centimetres is equal to 254 / 2.54 = 100 inches.


How many mm in an inch?

One inch is equal to 25.4 mm


6 inches equals how many mm?

1524mm 1 inch = 254 mm


How many mm in 22 inches?

1 inch = 254 mm 22 inch = 22 x 254 mm Direct Conversion Formula 22 in* 25.4 mm 1 in = 558.8 mm


How many mm equal one inch?

25.4 mm per inch.


How many decimeters are equal to 1 inch?

There are .254 decimeters in 1 inch.


How many inches are in 24.5 mm?

24.5 mm is equal to 2.45 cm. One inch is equal to 2.45 cm. Therefore, 24.5 mm is equal to one inch.


What is one mm equal to in inches?

One inch is equal to 25.4 mm.


What is 18 inch equal to in mm?

457.2 mm


What does half an inch equal in mm?

12.7 mm


What is 5mm in fraction in inches?

1 inch = 25.4 mm So 5 mm/1 inch = 5 mm/25.4 mm = 5/25.4 = 50/254 which can be simplified if you wish.


How many mm equal to 100 inch?

Note : 1 inch = 25.4 mm


How many inches are there in 254 millimetres?

There are 25.4 millimetres in one inch. Therefore, 254 millimetres is equal to 254/25.4 = 10 inches.


What does 17.4 mm equal in inches?

1 inch = 25.4 mm 17.4 mm = 0.68504 inch (rounded)


What does three thousandths of an inch equal in mm?

Three thousandths of an inch (0.003") is exactly 0.0762 mm


What does five thousandths of an inch equal in mm?

Five thousandths (0.005) of an inch is exactly 0.127 mm


What does 60000 of an inch equal in mm?

1/60000 inch = 0.000423333 mm


How many mm equal 1 in?

1 inch = 25.4 mm.


How many millimeter are in a inch?

One inch is equal to about 25.4 mm


Half an inch is how many mm?

Half inch is equal to 12.7mm