Length & Distance Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Metric & Imperial Units Reference Matrix
Popular Length & Distance Conversions
About Calculator
The Length & Distance Converter supports millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. All conversions use precise conversion factors based on the international yard and pound agreement (1 inch = 25.4 mm exactly).
Common conversions include centimeters to inches (÷ 2.54), kilometers to miles (÷ 1.60934), and meters to feet (× 3.28084). The converter works in both directions instantly.
Frequently Asked Questions (FAQ)
How many centimeters are in an inch?
Exactly 2.54 cm. This is a defined constant under the international yard and pound agreement of 1959.
How do I convert km to miles?
Divide km by 1.60934. For example, 100 km ≈ 62.14 miles.
Is the conversion exact?
Yes, all conversion factors are mathematically exact or use the maximum precision available in IEEE 754 floating-point arithmetic.
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