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1 inch = 2.54 cm exact = 25.4 mm and 1 foot (feet) = 12 inch (inches) = 30.48 cm

1 yard yd = 0.9144 m = 36 inches (in) = 3 feet (ft) und 1 land mile = 5280 feet = 1609.344 m

1 m (meter) = 10 dm (decimeters) = 100 cm = 1,000 mm and 1 cm = 10 mm = 0.1 dm = 0.01 m

1 km (kilometer) = 1000 m (meters) = 100,000 cm (centimeters) = 1,000,000 mm (millimeters)

The international inch is defined in terms of the metric (!) system of units to be exactly (!) 25.4 mm. This definition was agreed upon by the U.S. and them British Commonwealth in 1958. Prior to that, the U.S. and Canada each had their own, slightly different definition of the inch in terms of metric units, while the U.K. and other Commonwealth countries defined the inch in terms of the Imperial Standard Yard. The U.S. continued to use its previous national definition of the inch for surveying purposes. This inch, known as the U.S. survey inch is defined so that 1 metre is exactly 39.37 survey inches. 1 survey inch equals approximately 25.40000508 mm, or 1.000002 international inches.

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15y ago
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10y ago

That is how many cm are in one inch.

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8y ago

Yes

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Q: There are 2.54cm in one inch. Is it exact or measured?
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