Free sport tools
The right size, the right pace,
the right answer
Simple free tools for runners, swimmers, riders and everyone in between. No sign-up, no waffle.
Swimming tools
New
CSS calculator
Critical Swim Speed and training zones from two time trials
New
Wetsuit thickness guide
What to wear for the water temperature
Coming soon
Swim pace converter
Pool pace to open water and back
Running tools
New
Race pace planner
Splits and pacing for your goal time - even or negative
New
Hill effort converter
Grade-adjusted pace - what that climb really cost you
New
Race time predictor
One result predicts your 5K to marathon times
New
Heart rate zones
Five training zones - %max or Karvonen with resting HR
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