Calculate lap times or splits for various races

Introduction

Calculate splits for a goal time over a certain race distance and
split length. This calculator was designed for track and field
distances, but it can also be used for ultra marathons, road races,
cycling races, swim races, etc. Just enter your goal time, race
distance, and your desired distance for splits. Advanced: You can also estimate your race time by entering your goal split time and split distance under "Goal Performance" and your race distance under "Split Distance".

use the old calculator

use the old calculator

Examples

Calculate 400m track lap splits for a 1500m race

Calculate 1km splits for a 100mile race

Calculate 1km splits for a 10km race

Use split distance larger than race to estimate endtime; Predict 3km race time based on 400m split