Distance and time
Enter a race distance and finish time to estimate average pace per mile and per kilometer.
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Half Marathon Pace Calculator
Calculate half marathon pace from finish time or project your result from pace, with 2:00:00 example splits, mile pace, kilometer pace, and projections.
Quick answer
Half Marathon Pace Calculator quick answer
For the half marathon example, 2:00:00 over 13.1 miles / 21.1 kilometers equals 9:09 per mile or 5:41 per kilometer. Change any two fields to calculate the third.
Pace calculator guide
How to use this pace calculator
Half Marathon Pace Calculator is built for changing one value at a time: adjust finish time, pace, or distance and the missing result updates immediately. The starting example is 2:00:00 across 13.1 miles / 21.1 kilometers.
Use this page when you already know the race distance and want a calculator focused on half marathon pacing. It shows 9:09 per mile, 5:41 per kilometer, related race projections, and cumulative splits.
Pace calculation
2:00:00 over 21.1 km works out to about 5:41 per kilometer.
Distance and pace
Enter a goal pace with a distance to project finish time for a workout, time trial, or race.
Time and pace
Enter how long you plan to move and the pace you expect to hold to estimate distance covered.
Splits
Use the split table to see cumulative elapsed time at each mile or kilometer through the finish.
Distance-specific calculator
This page keeps the half marathon distance loaded so you can test finish time and pace changes quickly.
The starting example is 2:00:00, which equals 9:09/mi or 5:41/km.
Three calculator modes
Use distance plus time to find average pace, distance plus pace to project a finish, or time plus pace to estimate distance covered.
Examples and projections
The scenario table gives copyable examples for half marathon planning, while the projections table shows how that pace carries to nearby race distances.
Related goal paces
Comparable running paces
Compare this pace against common 5K, 10K, half marathon, and marathon goals, then adjust the calculator for your own race plan.
25 minute 5K
A 25:00 5K is 5:00 per kilometer.
50 minute 10K
A 50:00 10K uses the same 5:00 per kilometer pace.
2 hour half marathon
A 2:00:00 half marathon is about 5:41 per kilometer.
4 hour marathon
A 4:00:00 marathon is about 5:41 per kilometer.
5:00 per kilometer
Running 5:00 per kilometer projects to about 25:00 for 5K and 50:00 for 10K.
6:00 per kilometer
Running 6:00 per kilometer projects to about 30:00 for 5K and 1:00:00 for 10K.
Related pace pages
Plan another goal
Half Marathon Pace Chart
half marathon pace chart page with pace, split, chart, and conversion details.
2 Hour Half Marathon Pace
2 hour half marathon pace page with pace, split, chart, and conversion details.
Marathon Pace Calculator
marathon pace calculator page with pace, split, chart, and conversion details.
Half Marathon Pace Calculator FAQ
Quick answers for this pace target, including pace per mile, pace per kilometer, and how the split table is calculated.
What can this half marathon pace calculator solve?
A 2:00:00 half marathon is about 9:09 per mile or 5:41 per kilometer.
Which two inputs should I enter?
Enter distance plus time to find pace, distance plus pace to project finish time, or time plus pace to estimate distance.
Why use a half marathon-specific calculator?
This calculator keeps the half marathon distance loaded, so the examples and projections stay focused on that race distance.