Running Tools
Explore our curated collection of calculators and guides related to Running. Use these scientific tools to optimize your performance and health.
Running Pace Calculator — Pace, Speed & Race Projections
Calculate your running pace per km and per mile, speed, and projected finish times for 5K, 10K, Half Marathon, and Marathon.
Running Calorie Burn Calculator — Calories & Fuel Used Per Run
Calculate the exact calories burned, glycogen depleted, and fat used during any run — plus how many gels you need to replace the carbohydrate burned.
Sweat Test Calculator — Your Personal Sweat Rate in oz/hr
Calculate your exact sweat rate and fluid replacement needs using the professional weigh-in/weigh-out sweat test method, with results in oz/hr and sodium estimates.
Race Altitude Adjustment Calculator — High Altitude Pace & Hydration
Calculate your adjusted race pace, extra hydration needs, and acclimatisation requirements for racing or training at altitude, based on Daniels' altitude formula.
ACWR Calculator — Acute:Chronic Workload Ratio for Runners
Compare this week's training load against your previous three weeks to spot an unintended ramp. Reports the uncoupled ratio, which avoids the statistical artefact in the original formula.