Speed Units (kph, mph and m/sec) Conversion

Use this calculator to convert kph, mph and m/sec, and vice versa. Enter just one of the amounts of meters per second, kilometer or miles per hour, and click 'submit'. The other units will be calculated for you.


The units are rounded to two decimal places so occasionally there will be rounding errors.

The International System of Units (SI) unit for speed or velocity is meters per second (m/s). The unit symbol for kilometers (also spelled kilometres outside of the US) per hour is km/h or km·h−1, though the colloquial abbreviations "kph" and "kmph" are sometimes also occasionally used. For miles per hour the units symbol commonly used is mph.


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