Strength & Performance Calculators
Comprehensive barbell strength calculations: Epley 1RM equations, working set recommendations (5×5 and 3×8), relative strength ratios, rest time intervals, and normalized cross-bodyweight powerlifting scores.
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Calculators in this Category (6)
Select a tool to compute customized results with instantaneous formula execution.
Bench Press 1RM Calculator
Calculate your bench press one rep max, strength-to-bodyweight ratio, and strength standards.
Squat 1RM Calculator
Calculate your barbell squat 1RM, strength-to-weight ratio, and strength standards from beginner to elite.
Deadlift 1RM Calculator
Calculate your deadlift one rep max, strength-to-bodyweight ratio, and standards for conventional or sumo.
Wilks Score Calculator
Calculate your Wilks score, DOTS points, and IPF GL points to compare lifters across weight classes.
Strength-to-Weight Ratio Calculator
Calculate your strength-to-bodyweight ratio for bench, squat, deadlift or pull-ups.
Rest Time Calculator
Find the right rest between sets for strength, muscle growth or endurance with a built-in timer.
Evaluating Relative Strength and Competitive Powerlifting
Relative strength (strength-to-bodyweight ratio) provides an objective benchmark of physical conditioning. Intermediate standards generally require benching bodyweight, squatting 1.5× bodyweight, and deadlifting 2.0× bodyweight.
Because larger lifters lift less relative to bodyweight due to geometric scaling (allometric law), formulas like Wilks, DOTS, and IPF GL Points apply mathematical regression to fairly crown best overall lifters across different weight categories.
Frequently Asked Questions
What formula is used to calculate 1RM?
Our lift calculators use the validated Epley formula: 1RM = Weight × (1 + Reps / 30), which yields high accuracy for sub-maximal sets between 1 and 10 repetitions.
What is the difference between Wilks and DOTS?
Wilks (1994) is the historic standard but has a slight bias toward lightweight and super-heavyweight lifters. The DOTS formula resolves this with modern competitive powerlifting data.