Tools for serious lifters

Strength Score Calculator

Enter your lifts across 345 exercises, see your strength level vs population standards, and watch 12 muscle groups light up on the body diagram.

1RM · strength level · muscle map · 345 exercises

RPE Calculator

Plan a set, estimate your 1RM, and see the full RTS-style RPE chart with weights projected from your max.

RPE · RIR · target load · backoff sets

Lean Body Mass Calculator

Calculate LBM from body-fat %, or estimate with Boer / Hume / James / Janmahasatian. See fat mass, FFMI, and your strength score.

LBM · FFMI · cut targets · body composition

Body Fat Calculator

Estimate body-fat % from the Navy tape method, skinfold calipers, or height and weight. See lean mass, fat mass, FFMI, and your strength score.

body fat % · Navy method · skinfolds · FFMI

Body Recomp Calculator

Calculate recomp calories, macros, training/rest-day targets, viability, and a realistic 12-week timeline.

calories · macros · training/rest split · viability

Barbell Weight Calculator

Type a target weight to see the exact plates per side, or tap the plates already on the bar to count the total. kg or lb.

plates · bar math · load-out · reverse count

1RM Calculator

Estimate your one-rep max from any set across seven proven formulas, with reps-in-reserve support and a full load-per-rep chart.

1RM · e1RM · strength benchmarks

Weight Lifting Percentage Chart

Turn your one-rep max into every training load from 100% to 30% — with the reps and training zone for each percentage. One lift or the big four at once.

% of 1RM · training loads · zones · Prilepin

Training Volume Calculator

Enter your weekly hard sets per muscle and see which groups are below the growth floor, productive, near your recovery ceiling, or past it.

weekly sets · MEV · MRV · per muscle