Plan race splits including a negative or positive split strategy.
A negative split means starting slightly slower than average pace and finishing faster. Almost every distance record has been set on a negative or even split rather than a positive one. Positive splits are the signature of starting too fast, and the time lost in the second half almost always exceeds what the fast start gained.
Running Split
First half = total × (1 + adjustment) ÷ 2; the remainder is the second half
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
First half = total × (1 + adjustment) ÷ 2; the remainder is the second half A negative split means starting slightly slower than average pace and finishing faster. Almost every distance record has been set on a negative or even split rather than a positive one.
Positive splits are the signature of starting too fast, and the time lost in the second half almost always exceeds what the fast start gained.
This calculator takes 4 inputs: Race distance, Target finish time, Second half faster by, Split interval. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.