Calculators
The instrument panel
Eight tools. All client-side, all instant, none of them asking for your email.
One-rep max
Five formulas, and the honest spread between them.
Open →DOTS & Wilks score
Compare totals across bodyweights, three ways.
Open →Plate loading
What goes on the bar, per side, in kg or lb.
Open →Warm-up ramp
A sensible ladder to a working single.
Open →RPE chart
Reps at RPE to a percentage of your max.
Open →FFMI
Fat-free mass index, height-normalised.
Open →Body fat (Navy)
The circumference method, with its real error bars.
Open →Protein target
A range, because the evidence is a range.
Open →SOURCE·Published formulae — Epley, Brzycki, Lombardi; IPF GL and DOTS coefficients·REVIEWED JUL 2026