Fitness calculators for strength training
Calculators for people who train with a barbell: estimate your one-rep max from a set, pick a working weight by percentage or RPE, quickly load the right plates and compare strength adjusted for bodyweight. All of them run in the browser, free and with no sign-up.
Calculators
1RM calculator
One-rep max from weight and reps: Epley, Brzycki and Lombardi formulas plus a 50–100% training weight chart.
OpenBarbell plate calculator
Which plates to load on each side of the bar for a target weight, plus warm-up sets with plate breakdown.
OpenRPE and RIR calculator
Working weight for a target rep count at a given RPE and estimated 1RM from a set — full RPE chart.
OpenWilks, DOTS and IPF GL calculator
Bodyweight-adjusted strength points: Wilks (classic and 2020), DOTS and IPF GL for powerlifting total and bench.
OpenPowerlifting standards
Strength level from Beginner to Elite and Russian EVSK 2026 rank for the bench and total — and how far the next one is.
OpenBench press standards
Russian EVSK classic bench ranks and strength levels by bodyweight for men and women.
OpenSquat standards
Squat strength levels by bodyweight for men and women, with a level calculator.
OpenDeadlift standards
Deadlift strength levels by bodyweight for men and women, with a level calculator.
Open
How calculators help your training
Most strength programs prescribe load as a percentage of 1RM or by RPE — “5 × 5 at 75%”, “3 × 3 @ RPE 8”. To turn that into kilograms you need to know your max and how to recalculate it. Start with the 1RM calculator: from one set of 2–8 reps it estimates your max and shows a chart of training weights.
Next the working weight has to go on the bar — the plate calculator shows what to load on each side and your warm-up sets. And when you want to compare yourself with others or see whether your relative strength grows as your bodyweight changes, Wilks, DOTS and IPF GL points come in handy.
FAQ
Which calculator should I start with?
The 1RM calculator: almost every other calculation is based on your one-rep max. Take a recent set of 2–8 reps and it estimates your max and shows training weights from 50 to 100%.
How accurate are the results?
They are estimates: the formulas were derived from large groups of lifters, and for an individual the result can differ by 5–10%. Use them as a starting point and adjust weights by feel and your diary records.
Are the calculators free?
Yes, all calculators are free and work in the browser on desktop and mobile with no sign-up. Results are calculated right on the page as you type.
Should I use percentages of 1RM or RPE?
Percentages are simpler and suit beginners on a clear program. RPE is more flexible: the weight adapts to how you feel on the day. Many programs combine both — the main set by percentage, extra sets by RPE.
How do I save my results?
Log your working sets in the Workouter workout diary: weight history and progress charts for each exercise show how your max grows, and you always have a recent set for a new calculation.