# Calculators

Optional RPE or RIR. Kilograms by default.

- [Estimate a one-rep max](/calculator/one-rep-max.md): weight + reps → 1RM
- [Estimate a load](/calculator/load.md): 1RM + reps → weight
- [Rep-max table](/calculator/rep-maxes.md): 1RM → 2–12RM
- [Compare formulas](/calculator/compare.md): one set through all five formulas
- [Powerlifting total](/calculator/total.md): squat + bench + deadlift
- [Load–velocity 1RM](/calculator/velocity.md): load and velocity pairs
- [Estimate VO2max](/calculator/vo2-max.md): Cooper, Rockport, or Léger field test
- [Points](/calculator/points.md): IPF GL, DOTS, Wilks, Sinclair, ratios
- [RPE to % 1RM](/calculator/rpe-percent.md): Helms / Zourdos chart
- [Work sets](/calculator/work-sets.md): 1RM × percent
- [Warm-up](/calculator/warm-up.md): empty bar to work set
- [Plate loading](/calculator/plates.md): bar plus plates
- [Attempts](/calculator/attempts.md): opener / second / third
- [YMCA bench press](/protocols/ymca-bench.md): completed reps at the protocol cadence

Query params for 1RM tools: `formula`, `unit`, `rpe`, `rir`.
1RM RPE adds leftover reps. The Helms chart is a separate lookup.