#powerlifting

Barbell and weight-training maths as an API, computed locally and deterministically — the plate-loading and percentage numbers a lifter, coach or gym app works out at the rack. The plates endpoint solves the everyday gym puzzle of which plates go on each side for a target weight: 100 kg on a standard 20 kg bar means 40 kg a side, loaded heaviest first as a 25 and a 15; 102.5 kg adds the 1.25 micro-plate; and if a target is not reachable with the plates on hand it loads the closest it can and tells you the shortfall, so you never guess. It works in kilograms or pounds (225 lb on a 45 lb bar is two 45s a side), with a custom bar weight and a custom plate set. The percent endpoint turns a one-rep-max into the working weight you actually load: 80 % of a 100 kg max is 80 kg, and asking for a five-rep weight returns about 85.7 kg via the Epley formula (1RM = weight × (1 + reps ÷ 30)) — five reps sits near 86 % of max, ten reps near 75 %. The warmup endpoint builds a ramp from the empty bar to the working set at roughly 40, 55, 70 and 85 %, each rounded to a loadable increment, with the rep count dropping as the bar gets heavy. Everything is computed locally and deterministically, so it is instant and private. Ideal for gym, strength-training, powerlifting and fitness app developers, workout-logger and coaching tools, and smart-rack and plate-calculator builders. Pure local computation — no key, no third-party service, instant. Exact maths, no simulation. Live, nothing stored. 3 compute endpoints. For one-rep-max estimation from a set use a strength API.

api.oanor.com/barbell-api

Strength-training maths as an API. The one-rep-max endpoint estimates your one-rep max from a set of a given weight and reps using five established formulas — Epley, Brzycki, Lander, Lombardi and O'Conner — with their average, and returns a rep-max table showing the estimated weight (and percentage of 1RM) for 1 to 12 reps. The plates endpoint works out exactly which plates to load on each side of a barbell for a target weight, given the bar weight and the plate denominations you have, and tells you whether the target is achievable exactly. The wilks endpoint computes the Wilks (classic) and DOTS relative-strength scores from bodyweight and total lifted, so lifters of different sizes can be compared fairly. Everything is computed locally and deterministically, so it is instant and private. Ideal for gym and lifting apps, powerlifting and strength coaching, workout planners and progression trackers, and fitness wearables. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. This is strength maths; for BMI, BMR and calories use a health-calculator API and for heart-rate training zones use a heart-rate API.

api.oanor.com/strength-api