CALCULATOR

Swim Pace Calculator

Find the pace/100 m required for your target time over a swimming distance, or calculate your finish time from your average swim pace.

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Course
Distance
Finish Time
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Required Pace1:40 /100m

1500m in 0:25:00

How to use it

How to use it

Select Pool, Open Water or Custom distance to see common distances. Choose whether to calculate finish time from pace/100 m or pace/100 m from total time. The table updates automatically as you change your selections.

Limits

What you need to know

This assumes a constant pace and does not automatically convert 25 m pool pace to 50 m pool pace. For that, use the Swim Course Converter. In open water, waves, currents, sighting, drafting and wetsuit use can substantially change your actual pace. Account for these factors and use a realistic average pace.

Related article

Read the related article

Performance & Physiology

Swim pace per 100 m: how to turn your target time into accurate, useful splits

1500 m in 25:00 means 1:40/100 m. Learn how to turn a target time into useful training splits and why the same pace does not automatically transfer from a 25 m pool to a 50 m pool or open water.

7 min read
  • swim pace
  • swimming splits
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Critical Swim Speed Calculator

Calculate Critical Swim Speed (CSS) as pace/100 m from two maximal pool efforts over different distances.

400 6:20 · 200 2:50 → 1:45/100m

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Swimming

Swim Course Converter

Estimate equivalent pace/100 m between pools of different lengths, accounting for the different number of turns, stroke and assumed gain from each wall push-off.

1:30/100m · 25m → 1:31.6/100m

Calculate
Triathlon

Triathlon Finish Time Planner

Calculate your total triathlon finish time by adding swimming, T1, cycling, T2 and running. Choose Sprint through IRONMAN or custom distances, using pace /100 m, average speed or total time for each leg.

Standard (Olympic) → 2:35:00

Calculate
Next step

Explore 1:1 Coaching

Your pool pace rarely translates directly into open-water race pace. Together, we will build a plan that emphasises sighting, drafting and conserving energy for the bike and run legs that follow.

Explore 1:1 Coaching
Method

Methodology & Sources

Formula: pace /100 m = (time / distance in metres) × 100. Pool distances: 50 m, 100 m, 200 m, 400 m, 800 m and 1500 m, following recognised World Aquatics freestyle distances. Open Water: 5 km and 10 km, following World Aquatics. Triathlon: Sprint 750 m and Standard (Olympic) 1500 m, following World Triathlon. IRONMAN: 1.9 km for IRONMAN 70.3 and 3.8 km for IRONMAN.

Last updated: 16 June 2026