Rangdom

Convert a running pace into every unit at once

Enter one value and a unit — minutes per kilometer, minutes per mile, kilometers per hour, or miles per hour — and read it back in every unit at once. Pace units accept m:ss (such as 5:30) or decimal minutes (5.5); speed units accept a plain decimal. Pace is the inverse of speed, so each input is reduced to a canonical speed in meters per second (1 km = 1000 m, 1 mile = 1609.344 m), then every output is derived from that base. A pace or speed cannot be zero or negative.