Which calculator?
Choose the calculator by the question you need to answer. Race-derived fitness helps organize training paces, qualification tools check entry standards, and fueling tools total a practiced race plan. Start with representative inputs, then read the method and limits. Using several relevant tools can clarify a decision; it does not remove the need for context.
| Your question | Start here | Check next |
|---|---|---|
| What can I train at? | CORE Fitness Score | Heart-rate reserve zone calculator |
| What pace for my goal? | Marathon pace calculator | Printable race pace band |
| Can I qualify for Boston? | Boston qualifier calculator | Race time predictor |
| How much fuel should I carry? | Race-day fueling planner | Sweat-rate calculator |
| How should hills change effort? | Grade-adjusted pace calculator | Heat-adjusted pace calculator |
| How do my triathlon splits add up? | 70.3 and IRONMAN split planner | Swim CSS calculator |