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Swim Speed and Critical Swim Speed (CSS) Calculator:
Your Ultimate Tool for Better Swimming

Calculate Your Swim Speed Training Zones

Swim Speed Training Zones

Zone Intensity Swim Speed (mm:ss / 100m or 100y)
1 Easy -
2 Steady -
3 Moderately Hard -
4 Hard -
5 Very Hard -

Ironman Triathlon Expected Swim Times

Event Finish Time
Half Ironman 70.3 (HIM) 1.2 mile swim -
Ironman (IM) 2.4 mile swim -
What is the Swim Speed and Critical Swim Speed (CSS) Calculator?
The Swim Speed and Critical Swim Speed (CSS) Calculator is a helpful tool for swimmers and triathletes. It helps you understand your swimming performance and develop better training routines. By entering the times for two different swim distances, this calculator estimates your Critical Swim Speed (CSS)—the fastest pace you can keep up for a long time without getting too tired. With this information, you can improve your training, plan your workouts, and get ready for races more effectively.
Why Should You Use the Swim Speed and CSS Calculator?
What is Critical Swim Speed (CSS)?
How to Calculate CSS?
Training Zones
Estimate Your Race Times
Scientific Basis

Conclusion

The Swim Speed and Critical Swim Speed (CSS) Calculator is an essential tool for anyone looking to improve their swimming. By understanding and using your CSS, you can optimize your training, plan better race strategies, and achieve your swimming goals. Remember, consistent training and using insights from your CSS will lead to long-term improvements in your swimming performance.

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