Gym Calculator

Save bar weight and plate setup as named presets. Presets are stored only in this browser on this device.

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Bar Weight (lbs)

Barbell warm-up sets are automatically optimized to reduce plate changes.

Show backoff sets

Backoff Set Percentage

%

Calculate your one-rep max (1RM) and rep ranges based on your weight and reps. Add multiple sets for a more accurate estimation.

Calculation MethodChoose how to calculate your 1RM from multiple sets.

Set		Reps	Est. 1RM

Based on average of multiple setsBased on highest estimated 1RMBased on lowest estimated 1RMBased on weighted average of multiple sets

Based on the Epley formula

Reps	Weight (lbs)	% of 1RM

Estimate your 1RM from multiple sets, then see how it stacks up against common strength standards for your bodyweight.

Lift

Bodyweight (lbs)

Calculation Method

Set	Weight (lbs)	Reps	Est. 1RM

Based on average of multiple setsBased on highest estimated 1RMBased on lowest estimated 1RMBased on weighted average of multiple sets

Based on the Epley/Brzycki formulas