Free tools
Evidence-based training tools, free to use.
The same maths that powers the Adaptiv coaching engine, opened up as free calculators. No sign-up, no limits.
One rep max calculator
Estimate your 1RM from any working set and generate a full percentage-based loading table — with an honest accuracy rating.
Open toolTraining volume calculator
Map your weekly sets per muscle group against MEV, MAV and MRV, and check your push/pull balance.
Open toolRPE calculator
Convert RPE to a percentage of your 1RM, read off reps in reserve (RIR), and prescribe load from the full RTS chart.
Open toolPlate calculator
Enter a target weight and your bar to see exactly which plates to load on each side — kg or lb, with a not-loadable warning.
Open tool