Convert between pace and speed and project finishing times.
Pace and speed are reciprocals, so pace is the natural unit when the distance is fixed and speed when the time is. Projecting a longer distance at the same pace ignores fatigue and so understates the time. Linear projection from a half marathon to a full one typically understates finishing time by five to ten per cent, because pace degrades with duration.
Travel Pace
Pace = duration ÷ distance; speed = distance ÷ duration
Pace = duration ÷ distance; speed = distance ÷ duration Pace and speed are reciprocals, so pace is the natural unit when the distance is fixed and speed when the time is. Projecting a longer distance at the same pace ignores fatigue and so understates the time.
Linear projection from a half marathon to a full one typically understates finishing time by five to ten per cent, because pace degrades with duration.
This calculator takes 3 inputs: Distance, Duration, Target distance for projection. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.