Skip to main content

Protein Calculator for GLP-1 Weight Loss

See a practical daily protein range and an easy per-meal split from the reference weight you choose.

See a practical daily protein range

Use the reference weight you choose to see a daily range and an easy per-meal split.

Daily protein range

Question 1 of 3

What do you weigh?

The range is grams per kilogram of this reference weight.

Units
lb

Stays in your browser. Never sent to MeAgain.

Calculated in this browser. Your entries are not added to the URL or sent to MeAgain.

Keep protein visible every day.

Set your goal, log food quickly, and see protein beside fiber, water, weight, and dose day.

Download MeAgain

Quick answer

A common protein range while losing weight on a GLP-1 is 1.2 to 1.6 grams per kilogram of body weight a day, the range studied in weight management to help protect muscle, against the 0.8 g/kg adult baseline. At 80 kilograms (about 176 pounds) that is 96 to 128 grams a day versus a 64-gram baseline. MeAgain's free protein calculator turns your weight into the same three numbers plus a per-meal split, private in your browser.

Bottom line: There is no universal GLP-1 protein target or one reference weight that fits every body. Use this as a planning range, and ask a registered dietitian or licensed clinician to individualize it when needed.

Last updated July 14, 2026

Worked example

How much protein does the calculator show at 80 kilograms?

An 80 kg reference weight is about 176.4 lb. The calculator keeps each multiplier visible.

ReferenceCalculationDaily amount
Adult RDA baseline80 x 0.864 g
Research range, lower end80 x 1.296 g
Research range, upper end80 x 1.6128 g
Highlights

Key takeaways

  1. The adult RDA baseline is 0.8 grams of protein per kilogram of reference weight per day: weight in kg x 0.8.

  2. A published higher-protein weight-management range is 1.2 to 1.6 g/kg/day: weight in kg x 1.2 to weight in kg x 1.6.

  3. An 80 kg reference weight produces a 64 g/day baseline and a 96 to 128 g/day research range.

  4. The calculator does not decide whether current, goal, ideal, or adjusted weight is appropriate. That unresolved choice can materially change the number.

  5. MeAgain can track protein from meals beside fiber, water, weight, weekly doses, and symptoms after the one-time calculation.

Method and limits

Protein Formula, Worked Example, and Important Limits

01 · Section

The protein calculator formulas

First convert pounds to kilograms when needed: weight in kg = weight in lb / 2.20462.

Adult RDA baseline in grams per day = reference weight in kg x 0.8. Higher-protein research range in grams per day = reference weight in kg x 1.2 to reference weight in kg x 1.6.

The result is intentionally a set of reference amounts rather than one authoritative target. The RDA is a population-level allowance for generally healthy adults. The higher range comes from weight-management research and does not automatically apply to every person taking a GLP-1.

How the choice of reference weight changes the result

These labels describe different planning choices. The calculator does not select one as medically correct.

Reference weightWhy someone might use itMain limitation
Current weightUses a directly measured valueMay create a very high amount at a higher body weight
Goal weightConnects the estimate to a chosen destinationThe goal itself may be uncertain or inappropriate
Ideal or adjusted weightCan moderate estimates at higher weightsRequires another formula and clinical judgment

When a simple protein multiplier is not enough

  • Kidney disease, dialysis, liver disease, or another condition with a prescribed protein plan.
  • Pregnancy, breastfeeding, adolescence, older age, intensive training, or recovery from illness or surgery.
  • An eating disorder, food allergy, swallowing difficulty, persistent nausea, or very low food intake.
  • A result that is difficult to tolerate, afford, or distribute across meals.
  • Questions about muscle function, resistance training, or whether weight change includes lean tissue.

Protein is only one part of maintaining muscle and function during weight loss. Resistance exercise, total energy intake, age, illness, starting body composition, and the rate of weight change also matter. A calculator cannot measure muscle loss or prove that a protein amount will prevent it.

Built by the MeAgain team. Every number links to its published source below, and pages carry the date they were last verified.

Sources

Sources last verified July 14, 2026

  1. National Academies - Dietary Reference Intakes for Protein and Amino AcidsSupports: Authoritative source for the 0.8 g/kg/day adult RDA baseline and the distinction between population references and individual needs.
  2. Leidy et al. - The Role of Protein in Weight Loss and Maintenance (American Journal of Clinical Nutrition, 2015)Supports: Review supporting the displayed 1.2 to 1.6 g/kg/day higher-protein weight-management research range and its limitations.
  3. Tinsley and Heymsfield - Body Composition and GLP-1 RA Treatments (Journal of the Endocrine Society, 2024)Supports: GLP-1-specific review of body-composition terminology, protein evidence, resistance exercise, and uncertainty around reference body weight.
  4. American College of Lifestyle Medicine et al. - Nutritional Priorities to Support GLP-1 Therapy for Obesity (2025)Supports: Multidisciplinary GLP-1 nutrition advisory supporting individualized assessment, adequate protein and nutrient intake, resistance training, and referral to a registered dietitian when appropriate.
FAQ

Protein Calculator for Weight Loss - FAQs

A common planning range is the higher-protein band studied in weight management: about 1.2 to 1.6 grams per kilogram of a reference weight, intended to help protect muscle while you lose weight. At 80 kg that is roughly 96 to 128 grams a day; the 0.8 g/kg adult baseline is 64 grams. It is a planning range, not a prescription, and no single number fits every GLP-1 user, so confirm yours with a clinician or registered dietitian.