Race Time Improvement Calculator

Find the percentage improvement between two race times.

Old time

New time

Improvement (%) 8

Time saved 120

Formula: improvement = (old − new) ÷ old × 100

Step-by-step with your numbers:

1. Values used:

2. Old time = 1,500

3. New time = 1,380

5. Improvement = 8%

6. Time saved = Old time - New time = 1,500 - 1,380 = 120

Did we solve your problem today?

Track your progress by comparing an old and a new race time.

The math behind it

improvement = (old − new) ÷ old × 100. A positive value means you got faster.

25:00 (1500 s) down to 23:00 (1380 s) → 8% faster, 120 s saved.

Is a small % a lot?

Yes — even 2–3% improvements are significant for trained runners.