Split Calculator — thepacecalculator.com

Race distance

Goal finish time

Hours

Minutes

min

Seconds

sec

Split strategy

➡️

Even

Same pace every split. Mathematically optimal.

📉

Negative

Second half faster than first. Elite strategy.

📈

Positive

First half faster. What most runners actually do.

Select a distance and enter your goal time.

Split table

Mile	Pace	Split time	Elapsed

Screenshot or print this table to take on race day.

Split strategies explained

Even splits Identical pace for every mile. Research shows this is the most efficient strategy — you avoid early glycogen burn and late-race fade.

Negative splits Run the second half slightly faster than the first. Nearly every marathon world record has been set with negative or perfectly even splits. The key is restraint in mile 1.

Positive splits Go out faster and slow down. Most recreational runners do this unintentionally. Use this view to understand the time cost of going out too hard.

Goal time → required pace

Sub-20 5K3:59/km · 6:26/mi

Sub-45 10K4:29/km · 7:14/mi

Sub-1:45 half4:58/km · 8:00/mi

Sub-2:00 half5:41/km · 9:09/mi

Sub-3:30 marathon4:58/km · 8:00/mi

Sub-4:00 marathon5:41/km · 9:09/mi

Sub-5:00 marathon7:07/km · 11:27/mi

These assume perfectly even splits. Select your distance above and enter these times to generate your full split table.

Half marathon checkpoints

5K checkpoint23.7% of race

10K checkpoint47.4% of race

Halfway point10.55 km · 6.55 mi

If you're running even splits, your 10K split should be almost exactly half your goal time.

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