How much protein do I need per day?

Sedentary adults often need about 0.8–1.2 g per kg; more active maintenance typically uses 1.2–1.6 g/kg—above the minimum RDA (~0.8 g/kg). Fat loss, muscle gain, and GLP-1–associated weight loss usually call for about 1.6–2.2 g/kg to preserve lean mass. Targets depend on weight, activity, training, age, and medical conditions.

Why is protein important on GLP-1 medications?

GLP-1 agonists (semaglutide, tirzepatide, liraglutide, etc.) reduce appetite and often lower total food intake. Without enough protein and resistance exercise, a significant portion of weight lost can be muscle—not just fat. Tracking daily protein grams (not relying on hunger alone) and strength training 2–3× weekly are widely recommended strategies discussed with clinicians and dietitians.

How does this Protein Target Calculator work?

Enter body weight, goal, activity level, and resistance-training frequency. We apply goal-based g/kg bands (0.8–1.2 for sedentary general health up to 1.6–2.2 for fat loss or GLP-1), adjust for training and age 65+, and—for GLP-1 users over 100 kg—use an adjusted body weight so protein is not overestimated. Results include daily grams and per-meal splits.

How much protein per meal?

Many experts suggest roughly 25–40 g of high-quality protein per main meal to support muscle protein synthesis—especially for adults over 65 or during weight loss. Our tool divides your daily range across 3 or 4 meals you select.

Is more protein always better?

Not necessarily. For most healthy adults, intakes above ~2.2 g/kg rarely add extra muscle benefit and may be unnecessary—this calculator caps recommendations at 2.2 g/kg. People with chronic kidney disease often need medically supervised limits—this calculator is not for kidney disease management.

Fat loss vs muscle gain—which needs more protein?

Both often use similar elevated ranges (about 1.6–2.2 g/kg) because deficits increase muscle-loss risk and muscle gain requires amino acids for repair. General maintenance is lower: about 0.8–1.2 g/kg if sedentary, or 1.2–1.6 g/kg with regular activity.

Do older adults need more protein?

Yes—many geriatric and nutrition guidelines recommend at least ~1.2 g/kg daily for adults 65+, sometimes more with resistance training, due to anabolic resistance and sarcopenia risk. Per-meal protein (≥25 g) matters as much as daily total.

Can I get enough protein on GLP-1 if I am not hungry?

Often yes, with planning: Greek yogurt, eggs, cottage cheese, fish, lean poultry, protein shakes, or fortified smoothies. Small, frequent, protein-dense meals beat skipping intake because appetite is low.

Plant-based diets and protein targets

Combine legumes, soy (tofu, tempeh), seitan, and grains across the day. Soy and many blends are complete proteins. You may need slightly more total grams than animal-only diets to match leucine intake—our targets are total grams; food choice is yours.

Should I use protein powder?

Whole foods first. Powders are a practical tool when appetite is low (common on GLP-1s) or after workouts. Whey, casein, egg, or soy isolate are common; choose products tested for quality if supplements are part of your plan.

How does resistance training interact with protein?

Protein provides amino acids; resistance training signals muscle to use them. Without lifting, high protein alone does not maximize muscle retention during weight loss. Aim for 2–3 weekly sessions when cleared by your clinician.

How is this different from the Macronutrient Calculator?

This tool focuses only on protein grams, meal splits, and GLP-1 muscle-preservation context. Our Macronutrient & Calorie Calculator sets full daily calories plus protein, carbs, and fats together.

When should I recalculate my protein target?

After weight changes of roughly 5% or more, when switching goals (e.g., starting GLP-1 or entering a cut), or when training volume changes significantly.

Can I export or share my results?

Yes. After calculating, use the share button to export a PDF or share a summary for your dietitian, trainer, or doctor visit.

Why is my protein target based on adjusted weight on GLP-1?

For GLP-1 users above 100 kg (220 lb), we apply an adjusted weight formula—100 kg plus 25% of weight above 100 kg—so daily grams do not scale unrealistically with total body weight (excess adipose tissue has lower protein needs than lean mass). Your actual weight still displays in results; gram targets use the adjusted value. Discuss personalized targets with your clinician.

Does kidney disease change protein advice?

Yes. Chronic kidney disease often requires medically supervised protein and phosphorus limits—do not use this calculator to set intake if you have CKD stages 3–5 or are on dialysis unless your renal dietitian approves.

Protein Target Calculator

Estimate your daily protein target in grams and per meal—tailored for general health, fat loss, muscle gain, and GLP-1 weight loss to help preserve lean muscle. Get activity and resistance-training adjustments, meal distribution guidance, and PDF export.

Enter your details — results appear below after you calculate.

Body weight

Units

Body weight (kg)

Age (optional, years)

Age 65+ adjusts minimum protein for sarcopenia risk

Goals, GLP-1 & training

Primary goal

Currently on GLP-1 medication (semaglutide, tirzepatide, liraglutide, etc.)—raises protein priority even if goal is not selected above

Activity level

Resistance training

Meals per day (for distribution)

How this Protein Target Calculator works

Enter body weight (kg or lb), optional age, goal (general health, fat loss, muscle gain, or GLP-1 weight loss), whether you are on GLP-1 medication, activity level, and resistance-training frequency. We apply goal-based g/kg ranges (about 0.8–1.2 g/kg for sedentary general health up to 1.6–2.2 g/kg for fat loss or GLP-1), convert to daily grams, and split targets across 3 or 4 meals.

On GLP-1 therapy, appetite often drops faster than protein needs—targets use 1.6–2.2 g/kg for muscle preservation. Above 100 kg body weight, an adjusted weight is used for gram calculations so protein is not overestimated. Results include interpretation, GLP-1 notes, reference tables, and personalized recommendations. Export a PDF or share for dietitian or clinician visits.

For full calories and macros, try our Macronutrient & Calorie, Calorie, or Body Fat calculators.

Protein Target Calculator – Daily Grams, GLP-1 & Muscle Preservation

Protein is the most discussed macronutrient in modern weight management—and for good reason. During calorie deficits, aging, and especially GLP-1–mediated weight loss, inadequate protein plus lack of resistance training often means losing muscle along with fat. Our Protein Target Calculator turns your body weight, goal, activity, and training into a daily gram range, g/kg reference, per-meal distribution, screening insights, and lifestyle guidance—with PDF export so you can bring clear numbers to your dietitian or clinician.

What Is a Daily Protein Target?

Protein supplies amino acids for muscle repair, immune function, enzymes, and hormones. The minimum RDA (~0.8 g/kg) prevents deficiency in sedentary adults but is low for people who exercise, lose weight, or take GLP-1 medications. Sports-nutrition and clinical commentary often recommend roughly 0.8–2.2 g/kg depending on activity and goal—higher in deficit or on GLP-1 therapy to protect lean mass. For GLP-1 users above 100 kg, gram targets use an adjusted body weight to avoid overestimating protein. Results show practical grams per day and grams per meal.

1What You Enter

Required inputs

Unit system: metric (kg) or imperial (lb)
Body weight
Primary goal (health, fat loss, muscle gain, GLP-1)
Activity level and resistance-training frequency

Optional context

Age (65+ raises minimum protein context)
GLP-1 medication checkbox (semaglutide, tirzepatide, etc.)
Meals per day (3 or 4) for distribution

2Formulas We Use

Daily protein (grams)

Daily protein (g) = effective weight (kg) × g/kg target

Example: 80 kg, fat-loss range 1.6–2.2 g/kg → 128–176 g/day; midpoint ≈ 152 g. GLP-1 above 100 kg: effective = 100 + (weight − 100) × 0.25 (e.g. 140 kg → 110 kg effective).

Per-meal split

Per meal (g) = daily range ÷ number of meals

Many experts aim for ≥25 g protein at main meals to support muscle protein synthesis, especially during weight loss or after age 65.

Goal-based g/kg bands

General health (sedentary / light): 0.8–1.2 g/kg
General health (moderate+ activity): 1.2–1.6 g/kg
Fat loss / muscle gain: 1.6–2.2 g/kg
GLP-1 / on GLP-1 meds: 1.6–2.2 g/kg (max cap 2.2)
Adjustments: +training, +activity, age 65+ floor; GLP-1 adjusted weight if >100 kg

Imperial reference (g per lb)

We also show g/lb (g/kg × 0.454) for users who think in pounds of body weight.

3What Your Results Include

Daily protein target (grams) and min–max range
g/kg and g/lb reference values
Priority level (standard, elevated, high for GLP-1)
Protein intensity scale (visual bar)
Per-meal distribution (3 or 4 meals)
GLP-1 muscle-preservation note and adjusted-weight explanation when applicable
Screening insights, interpretation, and health considerations
Contributing factors and personalized recommendations
g/kg reference table and PDF export / share

Protein Target Bands by Goal

Goal	g/kg/day	Priority
General health (sedentary / light)	0.8–1.2	Standard
General health (moderate+ activity)	1.2–1.6	Standard
Fat loss	1.6–2.2	Elevated
Muscle gain	1.6–2.2	Elevated
GLP-1 weight loss	1.6–2.2	High
Adults 65+	≥1.2 minimum	Often elevated per meal

GLP-1 Therapy & Lean Mass (Overview)

Semaglutide (Ozempic, Wegovy), tirzepatide (Mounjaro, Zepbound), and related agents reduce appetite and often total calories. Without adequate protein and resistance training, weight lost can include disproportionate muscle. Clinical and dietetic practice increasingly emphasizes protein tracking, strength exercise, and sometimes body-composition monitoring—not scale weight alone.

Risk	Why it happens	Mitigation
Muscle loss	Low calories + low protein + no lifting	1.6–2.2 g/kg, 25+ g/meal, resistance 2–3×/week; adjusted weight if >100 kg
Under-eating protein	Reduced appetite masks needs	Track grams; protein-dense snacks & shakes
Fatigue	Rapid loss, micronutrient gaps	Balanced meals; clinician follow-up

Protein Target vs Macronutrient Calculator

Tool	Best for	Output
Protein Target (this page)	GLP-1, muscle retention, protein-only focus	Grams/day, per meal, g/kg bands
Macronutrient & Calorie	Full diet planning	Calories + protein, carbs, fats

Sample Protein Calculations

Example A (fat loss)

70 kg, fat loss, moderate activity → 1.6–2.2 g/kg → 112–154 g/day (midpoint ~133 g). Three meals ≈ 37–51 g each.

Example B (GLP-1, 90 kg)

90 kg on tirzepatide → 1.6–2.2 g/kg → 144–198 g/day(midpoint ~171 g). Track daily; add resistance training.

Example C (GLP-1, 140 kg)

140 kg → adjusted 110 kg effective → 1.6–2.2 g/kg → 176–242 g/day (not 300g+ from full weight). Use protein-dense meals and shakes when appetite is low.

Benefits of Using This Protein Target Calculator

GLP-1–aware ranges – 1.6–2.2 g/kg with adjusted weight above 100 kg so targets stay realistic.
Clear gram targets – Converts g/kg into daily and per-meal grams.
Training-adjusted – Bumps targets when you lift 3+ times per week.
Older-adult context – Notes higher needs after 65.
Actionable meals – Split across 3 or 4 eating occasions.
Holistic follow-up – Link to Macro, Calorie, Body Fat, and WHtR tools on this site.

How to Use This Protein Target Calculator

Choose units – kg or lb to match your scale.
Enter weight – Use recent morning weight if tracking loss.
Select goal – Pick GLP-1 if on semaglutide/tirzepatide or check the GLP-1 box.
Add activity & lifting – Honest inputs improve the range.
Calculate – Review grams, per-meal split, insights, and recommendations.
Export or share – PDF for dietitian or doctor visits.
Recalculate – After ~5% weight change or goal shift.

Strategies by Priority Level

Standard (general health)

Hit daily gram target across meals
Add resistance training 2×/week for muscle health
Prioritize whole-food protein sources

Elevated / high (deficit, GLP-1, gain)

Track protein grams daily—do not rely on hunger alone on GLP-1
25–40 g protein at main meals when possible
Resistance train 2–3×/week; discuss plans with your clinician
Use protein shakes or Greek yogurt when meals are small

Understanding Your Protein Priority

Standard

Sedentary/light: ~0.8–1.2 g/kg. Moderate+ activity: ~1.2–1.6 g/kg. Increase if you enter fat loss or GLP-1 therapy.

Elevated

Fat loss or muscle gain (~1.6–2.2 g/kg). Supports satiety and lean-mass retention in deficit.

High (GLP-1)

Rapid loss with appetite suppression—protein and lifting are priorities, not optional extras.

High-Protein Foods (Approximate per Serving)

Food	Protein (g)
Chicken breast, 100 g cooked	~31
Greek yogurt, 170 g	~15–17
2 large eggs	~12
Canned tuna, 100 g	~26
Whey scoop (typical)	~20–25

Common Protein Planning Mistakes

1. Relying on the RDA alone

0.8 g/kg prevents deficiency but is low for active adults, older adults, and anyone losing weight on GLP-1.

2. One large protein meal per day

Spreading protein across meals often supports muscle protein synthesis better than a single 80 g dinner.

3. High protein without resistance training

Amino acids need a training signal. Lift 2–3× weekly during weight loss.

4. Ignoring appetite on GLP-1

Track grams; protein-dense snacks and shakes help when solid meals are small.

The Science Behind Protein Targets

Position stands from sports-nutrition societies and reviews in strength and weight-loss literature commonly cite 1.6–2.2 g/kg for maximizing lean mass in trained individuals, with similar ranges discussed for preserving muscle in energy deficit. Geriatric guidelines emphasize higher per-meal protein for older adults due to anabolic resistance. GLP-1 data continue to evolve; clinical focus on body composition—not just scale weight—drives current protein and resistance-training recommendations in weight-management care.

Related Tools on This Site

Pair protein targets with our Macronutrient & Calorie Calculator, Calorie Calculator, Body Fat Calculator, Waist-to-Height Ratio (WHtR), and Insulin Resistance (HOMA-IR) for metabolic and body-composition context.

Frequently Asked Questions (FAQs)

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Protein Target Calculator

Body weight

Goals, GLP-1 & training

How this Protein Target Calculator works

Protein Target Calculator – Daily Grams, GLP-1 & Muscle Preservation

What Is a Daily Protein Target?

1What You Enter

Required inputs

Optional context

2Formulas We Use

Daily protein (grams)

Per-meal split

Goal-based g/kg bands

Imperial reference (g per lb)

3What Your Results Include

Protein Target Bands by Goal

GLP-1 Therapy & Lean Mass (Overview)

Protein Target vs Macronutrient Calculator

Sample Protein Calculations

Example A (fat loss)

Example B (GLP-1, 90 kg)

Example C (GLP-1, 140 kg)

Benefits of Using This Protein Target Calculator

How to Use This Protein Target Calculator

Strategies by Priority Level

Standard (general health)

Elevated / high (deficit, GLP-1, gain)

Understanding Your Protein Priority

Standard

Elevated

High (GLP-1)

High-Protein Foods (Approximate per Serving)

Common Protein Planning Mistakes

1. Relying on the RDA alone

2. One large protein meal per day

3. High protein without resistance training

4. Ignoring appetite on GLP-1

The Science Behind Protein Targets

Related Tools on This Site

Frequently Asked Questions (FAQs)

How much protein do I need per day?

Why is protein important on GLP-1 medications?

How does this Protein Target Calculator work?

How much protein per meal?

Is more protein always better?

Fat loss vs muscle gain—which needs more protein?

Do older adults need more protein?

Can I get enough protein on GLP-1 if I am not hungry?

Plant-based diets and protein targets

Should I use protein powder?

How does resistance training interact with protein?

How is this different from the Macronutrient Calculator?

When should I recalculate my protein target?

Can I export or share my results?

Why is my protein target based on adjusted weight on GLP-1?

Does kidney disease change protein advice?

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Sarcopenia Risk Calculator

Lean Body Mass (LBM) Calculator

Creatine Dosage Calculator

GLP-1 Protein & Muscle Preservation Calculator

Fiber Intake Calculator

Fat Intake Calculator

Muscle Gain / Bulking Macro Calculator

Body Recomposition Calculator

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