Convert any length or distance unit and see the result in every common unit at once — metric and imperial.
MILLIMETERS (MM)
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CENTIMETERS (CM) · SOURCE
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METERS (M)
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KILOMETERS (KM)
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INCHES (IN)
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FEET (FT)
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YARDS (YD)
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MILES (MI)
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NAUTICAL MILES (NMI)
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Instant, exact conversions — everything runs in your browser.
Every value is converted through meters, the SI base unit. Each unit has an exact factor — for example 1 inch = 0.0254 m exactly (by international definition since 1959), 1 foot = 0.3048 m, 1 mile = 1609.344 m:
Result = Value × Factor(from) ÷ Factor(to)
Use cases: body measurements (cm ⇄ inches), height (meters ⇄ feet), screen and furniture sizes, running and cycling distances (km ⇄ miles), and navigation (nautical miles).
All calculations happen instantly in your browser. Your values are never sent to any server and never stored.
Type the value, set the 'from' unit to centimeters — the inches row updates instantly. The rule: 1 inch = 2.54 cm exactly, so divide by 2.54.
1 meter = 3.2808 feet (3 feet 3.37 inches). Conversely 1 foot = 0.3048 m exactly. Type 1 in the converter and read the whole table.
1 km = 0.62137 miles; 1 mile = 1.609344 km. Select kilometers as the source unit and the miles value appears immediately — great for race distances and road trips.
A land mile is 1609.344 m; a nautical mile is exactly 1852 m (one minute of latitude), used in aviation and sea navigation.
Because that's usually what you actually want — one input, every answer. There's no second dropdown to misconfigure, and comparing units side by side builds intuition.
Yes — the factors are the internationally defined exact values (inch = 25.4 mm, foot = 0.3048 m, etc.). Results are displayed with sensible rounding.