Conversion

Convert kilometers per hour to miles per hour. Enter km/h, kph, or kmh and choose the displayed decimal places.

Convert mph to km/h fast, see the exact result, a rounded road-speed value, and a back-conversion check for accuracy.

Convert millimeters to feet or feet to millimeters, with decimal feet, total inches, and feet plus inches output.

Convert feet to millimeters fast, or enter feet and inches together for an exact mm result with simple metric checks.

Convert miles to inches or inches to miles with the exact 63,360 factor, reverse mode, and optional scientific notation.

Convert inches to miles as a plain decimal and check the same distance in feet for short lengths.

Convert cubic meters to US or Imperial gallons, or reverse it, with unit rate, formula, and mismatch check built in.

Convert US or imperial gallons to cubic meters, or reverse it, with a clear gallon-type selector and reverse check.

Convert cubic meters and cubic yards fast, with exact factors, clear rounding, and a nearby-values table for quick checks.

Convert cubic yards to cubic meters or reverse it, with chosen rounding, exact factor shown, liters check, and reverse check.