SwimTimeCalculator.com
Free competitive swimming tool

Swim Time Converter

Convert race times between SCY, SCM, and LCM in seconds. Compare methods, see pace, and build your next race plan.

✓ No sign-up✓ Works on any device✓ Transparent method
01 · Enter a swim

Conversion details

Runs in your browser
Conversion method
02 · Estimated result

Converted swim time

Estimate
100 m Freestyle
59.80
SCY→LCM
Per 100 meters59.80
Per 100 yards54.68
Per 5029.90

Classical model: Uses published course factors plus a stroke-specific turn adjustment for sprint events.

Calculate paceBuild race splits

Use this as a planning estimate. Meet entries and qualifying decisions should follow the conversion policy of the relevant governing body.

Quick reference

Three pool courses, one clear result

SCY25 yards

Common in U.S. school and college swimming.

SCM25 meters

Short course with metric race distances.

LCM50 meters

Olympic pool length with fewer turns.

How it works

A useful estimate without hiding the assumptions

The classical model applies commonly published course factors and a stroke-sensitive adjustment for sprint turns. The optional wall-adjusted model estimates free-water speed and changes the number of wall opportunities.

See formulas and examples →
  1. 1
    Choose both courses

    Select the course where the swim happened and the one you want to estimate.

  2. 2
    Enter the event

    Add distance, stroke, and a result such as 1:05.23.

  3. 3
    Compare and plan

    Use the result, pace, and split tools as a training reference.

Keep calculating
Pace to time

Swim Time Calculator

Calculate total swim time from pace and distance.

Open calculator Training pace

Swim Pace Calculator

Turn a total time into 25, 50, and 100 pace.

Open calculator Race planning

Swim Split Calculator

Build even, positive, or negative splits.

Open calculator
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Common questions

Swim time conversion FAQ

How accurate is a swim time conversion?+

A conversion is a useful estimate, not a prediction. Starts, turns, underwater distance, stroke, fatigue, and the swimmer’s own strengths can move the real result away from a formula.

What do SCY, SCM, and LCM mean?+

SCY is a 25-yard pool, SCM is a 25-meter pool, and LCM is a 50-meter pool. LCM races have fewer turns than short-course races.

Can I use this result as an official qualifying time?+

No. Use the rules and official conversion tables published by the meet organizer or governing body for entries and qualification.

Why can the wall-adjusted estimate differ?+

It models the number of walls in each pool and applies a stroke-sensitive wall estimate. Strong turn and underwater swimmers may see a larger real short-course advantage.

Important:

SwimTimeCalculator.com provides reference estimates. It is not affiliated with USA Swimming, World Aquatics, or a meet-management provider.