Fitness calculator hub
Strength & Powerlifting Calculators
Strength training works best when the numbers serve the training plan rather than replace it. These calculators help you estimate a one-rep max, load a barbell, compare a lifting total or manage volume and effort. Use them to make sessions repeatable and to spot changes over time.
Explore Strength & Powerlifting Calculators
17 free toolsOne-Rep Max Calculator
Estimate your maximum lift and training percentages using the Epley formula.
Lean Body Mass Calculator
Calculate your lean body mass — everything except fat.
Barbell Plate Calculator
Calculate exactly which plates to load on each side of the barbell.
Workout Volume Calculator
Track your training volume per muscle group to optimize hypertrophy.
RPE/RIR Calculator
Calculate training intensity, estimated 1RM, and percentages using RPE.
Strength Score Calculator
Measure your strength standards compared to powerlifting classifications.
Body Measurements Ratio Calculator
Calculate bodybuilding proportions compared to classic Golden Era aesthetics.
Warm-Up Set Calculator
Generate a science-based progressive warm-up set protocol with exact weights, reps, and rest times.
% of 1RM Calculator
Generate a full load matrix showing exact weights for every percentage of your 1RM, with training zones.
Weekly Set Volume Calculator
Analyze your weekly training volume per muscle group against MEV, MAV, and MRV evidence-based thresholds.
Progressive Overload Calculator
Project strength progression over 12 weeks using linear, double, or percentage-based overload models.
Deload Week Calculator
Calculate exact deload targets using volume, intensity, or full deload strategies with scientific rationale.
Rest Time Between Sets Calculator
Calculate the optimal rest time between sets for strength, hypertrophy, endurance, and power training.
Powerlifting Total Calculator
Calculate your combined Squat, Bench Press, and Deadlift (SBD) total, relative strength ratio, and lift distribution.
DOTS & Wilks Calculator
Calculate your DOTS, Wilks, and IPF GL relative strength scores to compare lifting totals across body weights.
Strength Standards Calculator
Compare your lifting maximums against standard fitness benchmarks (Beginner to Elite) adjusted for bodyweight.
Sinclair Calculator
Calculate your Sinclair Coefficient and relative score for Olympic lifts (Snatch and Clean & Jerk) based on current IWF standards.
How to use these tools well
Use estimates to set training loads
A one-rep-max estimate is derived from a set you have actually performed, so it is useful for selecting approximate percentage-based loads. It is still an estimate: technique, fatigue, equipment and exercise selection can change how a weight feels on a given day. Leave room for judgement and stop a set if form or pain suggests it is not appropriate to continue.
Track more than a single maximum
A higher max is only one signal of progress. Training volume, repetitions at a given load, RPE or RIR, recovery and consistency can also show whether a programme is working. Pair the total, score and volume tools to see the relationship between a competition-style result and the work that supports it.
Compare scores in their intended context
Sinclair and powerlifting formulas are designed for particular sports, categories and rule sets. They are useful for comparison inside those contexts, not for diagnosing health or declaring one athlete universally stronger than another. Check the governing-body rules for any competition, since coefficients, divisions and equipment rules can change.