Free running tools

Four calculators that run in your browser, with no sign-up. They use the same pace arithmetic and planning rules as our training plans, so a number here matches a number in a plan.

Before you use them

Results are estimates and planning aids, not medical advice or clearance to train. Each tool states its assumptions and limits on its page. Talk to a doctor before starting a new training program.

Nothing you type is sent to a server. When you choose to continue to a plan, your numbers are saved in this browser only, to prefill the questionnaire.

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