17 free calculators
Free calculators for strength and endurance training
Fast, accurate and free. Every formula is sourced, and nothing you type leaves your browser.
- Formulas cited from published research
- Written and checked by a named author
- No sign-up needed
- Runs in your browser — nothing is sent
Strength
Load the bar, pick your working weights and compare totals.
Barbell Plate Calculator
See exactly which plates to load on each side of the bar.
Open calculatorRPE Calculator & Chart
Estimate your 1RM from any hard set, then pick weights by reps and RPE.
Open calculatorPowerlifting Score Calculator (IPF GL, DOTS, Wilks)
Compare your total across body weights with every major formula at once.
Open calculatorDOTS Calculator
Your DOTS score from your total and body weight, with Wilks and IPF GL alongside.
Open calculatorWilks Calculator
Your Wilks score, original and 2020, from your total and body weight.
Open calculatorBody composition
Lean mass, calories and protein for building muscle.
Nutrition
Supplement doses and meal timing, straight from the research.
Endurance
Pace, splits and calories for swimming, stairs and rucking.
Rucking Calories Calculator
Calories burned walking with a weighted pack, by speed, incline and terrain.
Open calculatorSwim Pace Calculator
Pace per 100 m or yards, race finish times and your CSS threshold pace.
Open calculatorStairMaster Calories Calculator
Calories burned on a stair climber for your weight, time and pace.
Open calculatorRunning
Pace, speed and splits, on the treadmill and on the road.
VO2 Max Calculator
Estimate your VO2 max and see where it lands against measured reference values.
Open calculatorMarathon Pace Calculator
The pace and splits your goal marathon time actually needs.
Open calculatorRun-Walk Calculator
Set your run and walk intervals and see the average pace they actually produce.
Open calculatorGrade-Adjusted Pace Calculator
Find the flat pace that would cost you the same effort as the hill you just ran.
Open calculatorTreadmill Pace Calculator
Turn the number on the treadmill display into your pace per mile and per kilometre.
Open calculatorHow these calculators are made
Published formulas, named sources
Each calculator implements a formula from a peer-reviewed paper or a sport governing body's own document, listed with a link on the page that uses it.
Checked arithmetic
Every formula is covered by automated tests that reproduce the worked examples from its source — powerlifting scores are also checked against real competition results.
A person behind it
Built and maintained by Abhishek Kumar. Every page shows who wrote it and when it was last reviewed.
Honest about limits
General fitness information, not medical advice. Results are estimates, and pages about supplements, fasting and calories say who should talk to a doctor first.
Read our editorial policy, the medical disclaimer or about TrainingCalcs.