Pace Calculator
Convert distance and time into pace, speed, or finish-time targets for workouts and races.
Open calculator
Training tools
Running calculators.
Plan races, set paces, and track fitness with precision using our pace calculator, race predictor, and pace converter tools.
Calculator Library
Choose the tool that matches today's run, race plan, or training question.
Race Time Predictor
Use a recent result to estimate realistic targets across common race distances.
Predict a time
Run/Walk Calculator
Build structured run/walk intervals that fit your total time and target distance.
Plan intervals
Splits Planner
Break a goal time into even, positive, or negative splits for race-day execution.
Plan splits
Heart‑Rate Zones
Set easy, aerobic, tempo, threshold, and hard-effort zones from your max heart rate.
Set zones
VO₂ Max / VDOT
Translate a race result into a fitness estimate and training pace reference.
Estimate fitness
Recovery & Rest
Balance hard sessions with rest guidance after races, workouts, and heavier weeks.
Check recovery
BMI Calculator
Calculate body mass index as a quick reference point alongside broader health context.
Calculate BMI
Weight Impact
Estimate how body-weight changes may affect pace and finish time under simple assumptions.
Estimate impactRunning calculator FAQs
Which calculator should I start with?
Use the pace calculator to convert finish times into pace targets, then plug those paces into the race predictor to map realistic goals for upcoming events.
How can I fine-tune training intensities?
The heart-rate and VO₂ / VDOT calculators translate race results into specific intensity zones so every workout lines up with aerobic development, tempo work, or speed training.
Do you cover recovery and off days?
Yes. The recovery guide and planner tools include sample down weeks, easy run suggestions, and reminders to schedule strength and mobility alongside hard sessions.