Price checked Oct 26, 2026

GLP-1 weight loss curve calculator

Pick your drug and enter your starting weight to see the phase 3 trial average, week by week. Add your current weight to see where you sit on it.

Tools: Curve calculator (this page) · Track your weigh-ins · Dose tracker · Plateau check · Protein & calories · Meal planner

Dose = the maintenance dose you are titrating toward. Trials reached it by week 16–20.

Already on it? Add these to see where you are

Trial average Illustrative range Placebo + lifestyle (STEP 1)

Not on a GLP-1 yet?

Three questions tell you the cheapest way to start — with insurance, direct from Lilly or Novo, or through a compounding pharmacy.

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Compounded GLP-1s have no FDA approval, and the FDA does not review compounded drugs for safety, effectiveness or quality before they are marketed. Provider links are paid affiliate links.

Protein target while you lose

Target: 1.2–1.6 g of protein per kg of goal weight per day while losing (current weight if you're already near goal). Body-composition studies suggest roughly 25–35% of weight lost can be lean mass, varying by drug and study. Adequate protein and resistance training may help preserve it. Your number, based on a healthy-range reference weight for the height above:

Above BMI 25, the range is applied to the weight at BMI 25 for your height, not current weight, which overshoots what muscle needs and is hard to eat on a suppressed appetite. Spread protein across 3–4 meals; a GLP-1 appetite makes one big protein meal hard.

Where to get it, and what it costs →Insurance, LillyDirect and NovoCare self-pay, telehealth, your own doctor. Four routes compared. What people actually buy →Protein, fibre, electrolytes and one way to measure: the short list people on a GLP-1 often buy in the first weeks.

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