Health & Fitness Tools

Free, private health & fitness tools that run entirely in your browser — right now that's the Barbell Plate Calculator, which turns a target weight into the exact plates to load on each side of the bar, in pounds or kilos, for whatever bar and plates your gym actually has. No upload, no account, no sign-up. More fitness calculators — one-rep max, RPE and training volume, macros and daily calories, bike gearing and fit — will land here as they ship.


5 tools available

Barbell Plate Calculator

Plates to load per side, any bar or set, lb/kg.

Beer Calorie Calculator

Beer calories from ABV & serving size, or homebrew OG/FG.

Beta Carotene Converter

Beta-carotene to bioavailable retinol (RAE) & daily value

Cycling Power Calculator

Estimate cycling watts & calorie burn from speed & weight

Bike Gear Calculator

Gear ratio, gear inches & cassette jump calculator


Every tool runs in your browser — no upload, no account, free.