Tools

Calculate running sweat rate from pre- and post-exercise weight, fluid intake, urine loss, and duration. Includes US and metric units, uncertainty, fluid-balance checks, and safety guidance.

Enter a recent race to calculate current-fitness easy, long-run, threshold, interval, and repetition paces in min/mile and min/km, plus workout splits.

Calculate running cadence in steps per minute, check single-foot counts, estimate step length, and build a safe 3–10% cadence progression.