The Lab
Strength
Tools
Every calculator I actually use to set my own working loads. All free, all of them run in your browser, none of them want your email address.
One Rep Max CalculatorSix formulas side by side, a percentage table, and warm-up sets.Bench Press CalculatorMax bench from any set — plus what the number means for your bodyweight.Squat Max CalculatorBack squat 1RM, and the depth problem that makes estimates lie.Deadlift Max CalculatorWhy deadlift estimates read high, and what to do about it.1RM Percentage ChartEvery percentage from 100% down to 45%, with reps at each load.5/3/1 CalculatorTurn three maxes into a full four-week Wendler cycle.Strength StandardsBeginner to elite, by lift, bodyweight class and sex.2x Bench Program BuilderA bench specialisation block with an unreasonable goal attached.
Start here
If you only use one of these, use the one rep max calculator. Almost every other tool here takes a max as its input, and you can get one from a set you have already done rather than spending a session testing.
These used to live behind tabs on a single page, which meant you could not link anyone to the one you meant. Now each has its own address.