Use this sports calculation for a clearly defined event, scoring convention, measurement period, and competition rule set.

Distance (km)

Required number in km. Distance covered in kilometers; must be greater than zero.

Duration (min)

Required number in min.

The cited overview of Sport supplies background for the terminology and domain context used by this tool.^[1]

Calculate running pace in seconds and mm:ss per kilometer from a distance and duration. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Pace (s/km)

Returned number in s/km. Seconds needed per kilometer.

Formatted pace

Returned string. Pace formatted as mm:ss per kilometer.

• Rules, timing systems, venue conditions, equipment, data providers, and governing-body definitions can differ between sports and seasons.
• Distance must be at least 0.
• Duration must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Verify the current governing rules and official event data, and retain the raw observations used to compute the result.

• Speed to Pace Converter

  Convert a speed in kilometers per hour to a running pace in seconds and mm:ss per kilometer.

• Speed and Velocity Converter

  Convert metres per second, kilometres per hour, miles per hour, knots, and Mach number. Mach conversion uses an explicit speed of sound; the default 340.29 m/s is an illustrative air value, not a universal constant.

• Convert Length

  Convert a finite value between supported length units.