Interactive
Calculators
Arithmetic aids for medication a licensed prescriber has already prescribed. Each shows its formula, its sources and a dated assumptions note, and runs entirely in your browser.
CalculatorProtein and energy calculator
Mifflin-St Jeor energy estimate and a sourced protein range, split per meal.
Checked September 4, 2026
CalculatorPlateau checker
Your weekly weights against an illustrative curve scaled to a STEP 1 or SURMOUNT-1 endpoint.
Checked September 4, 2026
CalculatorMaintenance planner
STEP 4 and SURMOUNT-4 applied to your weight, plus a question list for your prescriber.
Checked September 4, 2026