Everyday / Health
Pace Calculator
Calculate running pace, finish time, race projections, and split targets directly in your browser. Useful for race planning, treadmill checks, training pace math, and quick finish-time estimates without opening a spreadsheet.
00:52:00
Finish time
5:12
Per km
8:22
Per mile
Time -> pace
Mode
Status
Loaded a 10K starter example
Pace summary
Finish time: 00:52:00
Pace per km: 5:12
Pace per mile: 8:22
5K
00:26:00
Projected at current pace
10K
00:52:00
Projected at current pace
Half
01:49:42
Projected at current pace
Marathon
03:39:25
Projected at current pace
Split guide
20%
00:10:24
40%
00:20:48
60%
00:31:12
80%
00:41:36
100%
00:52:00
Why this gets reused
Runners revisit pace math before races, treadmill sessions, and training blocks.
Race projections and split guides make the tool more useful than a bare pace formula.
Good first-use cases
Checking what a recent 10K time means for half-marathon pacing.
Estimating a finish time from a target per-km or per-mile pace.