Free lifting calculators
Free calculators for lifting, built from the same math as the SigmaGains workout tracker. Work out your one rep max from any set, load the bar without doing arithmetic between sets, and turn an RPE or a percentage from your program into the weight to use.
Every calculator works in kilograms and pounds, runs in your browser and needs no account. When you would rather not do the maths at all, the app does it for every set you log.
One rep max calculator
Estimated max from any set, plus a rep max table and percentage chart.
Barbell plate calculator
Which plates go on each side for any total, in kg or lb.
Warm-up sets calculator
Warm-up sets, reps and plates from your working weight.
RPE calculator and chart
The RPE to percentage chart, plus e1RM and next-set loads from RPE.
Log it in SigmaGains
SigmaGains is a free workout tracker: log sets in a tap, get the plates worked out for you, see your estimated max climb and catch plateaus early. No ads, no subscription, and no account needed to start.
Start tracking free