Pace Time
Use Pace Time to break a race goal or workout target into mile, kilometer, or lap checkpoints - the actionable numbers you actually use while running.
A finish time is a single number. A split calculator turns that number into a sequence of checkpoints you can act on during a race or workout. Instead of "run 1:45 for the half marathon," you get "hit each mile near 8:01" - and you know at every mile marker whether you are on plan.
Pace Time does this with simple division and multiplication. The calculator works in time format natively, so you can enter 1:45:00 ÷ 13.1 and read the per-mile split directly.
Say your goal is a 2:00:00 half marathon. Here is how to build your split card in Pace Time:
Step 1 - Find per-mile pace. Enter 2:00:00 ÷ 13.1. Result: approximately 9:09 per mile.
Step 2 - Set cumulative checkpoints. Multiply pace by each mile number to know where you should be at each marker:
Mile 1: 9:09 × 1 = 9:09 | Mile 5: 9:09 × 5 = 45:45 | Mile 10: 9:09 × 10 = 1:31:30 | Mile 13.1: 9:09 × 13.1 = 2:00:00
Step 3 - Adjust for strategy. If you want a slight negative split, slow the first 5 miles by 5 seconds (9:14 × 5 = 46:10) and speed up the last 8.1 miles to compensate (2:00:00 - 46:10 = 1:13:50, then 1:13:50 ÷ 8.1 = ~9:07/mi).
Coaches often prescribe intervals at a target mile pace. Pace Time converts that into lap times instantly:
Workout: 8 × 400m at 6:40 mile pace. Enter 6:40 ÷ 4. Result: 1:40 per 400m lap.
Workout: 4 × 800m at 5:30 mile pace. Enter 5:30 ÷ 2. Result: 2:45 per 800m rep.
If you need rest-interval math too, add the recovery: 1:40 + 1:00 = 2:40 per cycle, then 2:40 × 8 = 21:20 total workout time.
Three common race strategies, and splits are how you plan each one:
Even splits - Every segment at the same pace. Simplest to calculate: just divide total time by distance. Works well for flat courses and experienced pacers.
Negative splits - Second half faster than the first. Divide the race into two halves and assign different pace targets. For a 4:00 marathon with a 1-minute negative split: first half at 2:00:30 ÷ 13.1 = ~9:12/mi, second half at 1:59:30 ÷ 13.1 = ~9:08/mi.
Positive splits - Second half slower (usually unplanned). If you know your pace drifts late in races, model it honestly. Pace Time lets you calculate the damage: if you slow by 30 seconds per mile over the last 10K of a marathon, enter 0:30 × 6.2 = 3:06 added to your finish time.
If your race marks kilometers instead of miles, the math works the same way - just divide by kilometers. A 50:00 10K target: 50:00 ÷ 10 = 5:00 per km. A 1:45:00 half marathon: 1:45:00 ÷ 21.1 = ~4:58 per km.
Pace Time does not care whether you divide by miles or kilometers. Enter the distance that matches your race course markers.
Coaches write workouts in paces, but athletes need concrete lap or segment times to execute them. Pace Time bridges that gap:
Common questions about breaking race goals and workouts into usable split targets.
A split is the time it takes to complete one segment of a race or workout - usually a mile, kilometer, or lap. If you run a 24:00 5K at even pace, your mile splits would each be about 7:44. Tracking splits tells you whether you are ahead of or behind your goal throughout the race.
Divide your goal finish time by the number of segments. For mile splits in a half marathon, divide your goal by 13.1. In Pace Time, enter your goal time, press divide, and enter the distance. The result is your target split.
Even splits means running every segment at the same pace. Negative splits means running the second half faster than the first. Most coaches favor a slight negative split for distance races because it prevents early burnout and often produces faster overall times.
Divide your target mile time by 4 to get 400-meter split time. For example, if your workout calls for 6:00 mile pace, each 400-meter lap should take about 1:30. In Pace Time, enter 6:00 ÷ 4 to get the answer.
Yes. Pace Time handles time arithmetic, so you can add swim, bike, and run segment times together, subtract transitions, or calculate pace for each leg independently. It works the same way as splitting a running race into segments.
Plan target pace, projected finish time, and race-day adjustments for the marathon distance.
Work backward from a 5K goal time or check whether your current pace matches race intent.
See common pace-to-finish-time relationships and use them as a quick planning reference.
Use the app for race splits, workout intervals, and pacing math on iPhone, iPad, Apple Watch, or Android.