Our online protein calculator covers every situation — from standard daily protein calculator for general health to specialized modes for GLP-1 users, CKD patients, and menopause. Click any card to activate that mode.
Our protein calculator for weight loss and protein calculator for weight loss female uses higher protein to preserve muscle during a calorie deficit. Women targeting weight loss typically need 1.2–1.6g/kg.
Our protein calculator for muscle gain, protein calculator for muscle growth, and protein calculator to build muscle use 1.6–2.2g/kg — the range supported by meta-analyses for maximizing muscle protein synthesis.
Our GLP-1 protein calculator and Zepbound protein calculator protects muscle mass during rapid GLP-1-induced weight loss. High protein + resistance training is essential on Ozempic, Wegovy, Mounjaro, or Zepbound.
Our CKD protein calculator adjusts protein intake based on kidney disease stage. Non-dialysis CKD patients need LESS protein to slow progression. Dialysis patients need MORE. Always consult a nephrologist.
Our free protein calculator is more complete than calculator.net, Optimum Nutrition, and MyFitnessPal — because it offers 8 specialized modes: protein calculator for weight loss (1.2–1.6g/kg with muscle preservation), protein calculator for muscle gain and protein calculator for muscle growth (1.6–2.2g/kg), protein calculator for weight loss and muscle gain (body recomposition), protein calculator for seniors (1.2–1.5g/kg for sarcopenia prevention), CKD protein calculator (stage-adjusted), GLP-1 protein calculator / Zepbound protein calculator (muscle preservation during rapid loss), menopause protein calculator, and a food protein calculator / protein calculator food with 40+ foods including the Chipotle protein calculator. Our calorie and protein calculator also shows full macro breakdowns.
Our protein calculator for weight loss and muscle gain (body recomposition mode) uses the highest protein range (1.8–2.2g/kg) because building muscle while losing fat requires more protein than either goal alone. This is supported by a 2018 meta-analysis in the British Journal of Sports Medicine showing that protein intakes above 1.62g/kg maximize muscle gains even at a calorie deficit. For the protein calculator for weight loss female: women typically use 1.4–1.8g/kg. Both men and women benefit from spreading this across 3–4 meals of 25–40g protein each, triggering multiple bouts of muscle protein synthesis throughout the day.
Female, 65kg, weight loss goal:
Protein = 65kg × 1.4g/kg = 91g/day minimum · 65 × 1.6g = 104g optimal
Per meal (4 meals): 91–104 ÷ 4 = 23–26g per meal
Male, 80kg, muscle gain goal:
Protein = 80 × 1.8g = 144g/day minimum · 80 × 2.2g = 176g optimal
Per meal (4 meals): 144–176 ÷ 4 = 36–44g per meal
Our GLP-1 protein calculator and Zepbound protein calculator are specifically designed for people taking GLP-1 receptor agonist medications. GLP-1 medications cause rapid weight loss — but without adequate protein and resistance training, studies show that 25–40% of weight lost comes from muscle mass rather than fat. Our calculator recommends 1.2–1.6g of protein per kg of current body weight per day for GLP-1 users. At low appetite levels common with these medications, prioritize protein-rich foods at every eating occasion: eggs, Greek yogurt, chicken, fish, cottage cheese, and protein shakes if needed to hit targets.
Our protein calculator for seniors recommends 1.2–1.5g/kg per day — 50% more than the standard adult RDA of 0.8g/kg. This reflects extensive research showing that older adults (65+) have anabolic resistance — their muscles require more protein stimulus to achieve the same muscle protein synthesis response as younger adults. Sarcopenia (muscle loss with age) is a major cause of falls, fractures, and loss of independence. Even modestly increased protein intake (1.2g/kg vs 0.8g/kg) combined with resistance training significantly preserves muscle mass in older adults.
The menopause protein calculator recommends 1.2–1.6g of protein per kg of body weight for women going through or post-menopause. Estrogen decline during menopause accelerates muscle loss (up to 0.5% per year) and bone density reduction, making protein and resistance training more important than at any previous life stage. Higher protein intake during menopause: 1) Supports muscle mass retention. 2) Improves satiety during potential weight gain period. 3) Helps maintain bone strength. 4) May reduce hot flash severity. Combine protein intake with calcium (1,200mg/day) and vitamin D for comprehensive bone support.
The CKD protein calculator is the only mode where lower protein is better (for non-dialysis patients). High protein intake creates metabolic waste products (urea, creatinine) that diseased kidneys struggle to filter, potentially accelerating kidney function decline. Stage 3–5 CKD (non-dialysis): 0.6–0.8g/kg/day. Stage 1–2 CKD: 0.8g/kg/day (standard RDA is acceptable). On dialysis: 1.1–1.5g/kg/day (more needed due to protein loss during dialysis sessions).
CKD protein warning: The CKD protein calculator results are estimates only. Incorrect protein intake can significantly accelerate kidney function decline. Always work with a nephrologist and renal registered dietitian to set your personal protein target. Phosphorus content of protein foods (high in dairy, nuts, beans) is equally important to manage in CKD.
Protein timing tip: Research shows that 25–40g of protein per meal maximizes muscle protein synthesis in adults. Consuming all your daily protein in one or two large meals leaves most of it unused for muscle building. Our protein calculator meal distribution table shows optimal per-meal targets. For athletes and muscle gain, a protein shake within 2 hours post-workout is beneficial — but the total daily amount matters more than timing for most people.
Questions covering protein for weight loss, muscle gain, GLP-1 medications, seniors, CKD, menopause, and food protein sources.
Our how much protein calculator and daily protein calculator uses these evidence-based ranges: Sedentary adults (RDA): 0.8g per kg body weight. For 70kg person: 56g/day. Lightly active: 1.0g/kg = 70g/day. Moderately active: 1.2g/kg = 84g/day. Weight loss: 1.4–1.6g/kg = 98–112g/day for 70kg. Muscle building: 1.8–2.2g/kg = 126–154g/day for 70kg. Seniors 65+: 1.2–1.5g/kg. GLP-1 users: 1.2–1.6g/kg. CKD Stage 3–5: 0.6–0.8g/kg. Our online protein calculator applies the right formula for your specific goal and weight.
Our protein calculator for weight loss and protein calculator for weight loss female uses 1.2–1.6g per kg of goal body weight (not current weight). Higher protein during weight loss: 1) Preserves lean muscle mass during calorie deficit (muscle is metabolically active — losing it slows metabolism). 2) Increases satiety — protein is the most satiating macronutrient. 3) Has higher thermic effect — you burn 25–30% of protein calories just digesting it vs 5–8% for carbs. For women specifically: 1.4g/kg is a practical starting point. Our protein calculator for weight loss and muscle gain mode uses 1.8–2.2g/kg for those doing body recomposition (losing fat while gaining muscle simultaneously).
Our protein calculator for muscle gain, protein calculator for muscle growth, and protein calculator to build muscle uses 1.6–2.2g per kg of body weight based on the most comprehensive meta-analysis (Morton et al., 2018, British Journal of Sports Medicine): protein intakes above 1.62g/kg do not further increase muscle gain in most populations. However, during calorie deficits, going up to 2.2–2.6g/kg can help preserve existing muscle. Practical target: 2.0g/kg for most natural athletes training 3–5 days/week. Example: 80kg man doing strength training: 80 × 2.0 = 160g protein/day. Split across 4 meals: 40g per meal.
Our GLP-1 protein calculator and Zepbound protein calculator covers Ozempic, Wegovy, Mounjaro, Zepbound, Saxenda, and other GLP-1/GIP agonists. These medications suppress appetite significantly — making it easy to under-eat protein. Studies on GLP-1-induced weight loss show 25–40% of lost weight can be muscle without adequate protein + resistance training. Recommendation: 1.2–1.6g protein per kg of current body weight per day. Practical tips for GLP-1 users: prioritize protein at every meal before eating other foods; use Greek yogurt, eggs, cottage cheese, and protein shakes to hit targets despite reduced appetite; do resistance training 2–3×/week to signal muscle retention even in a large calorie deficit.
Our food protein calculator, protein calculator food, and protein calculator in food shows 40+ foods across categories. Top protein sources: Chicken breast (cooked): 31g/100g. Tuna (canned): 30g/100g. Turkey breast: 29g/100g. Salmon: 25g/100g. Cottage cheese: 11g/100g. Greek yogurt: 10g/100g. Eggs: 13g/100g. Lentils (cooked): 9g/100g. Edamame: 11g/100g. Whey protein powder: 80g/100g. For the Chipotle protein calculator: Chicken (4oz serving) = 32g protein. Steak = 21g. Barbacoa = 24g. Tofu Sofritas = 8g. Black beans = 7g per serving. Switch to Food Protein mode in our calculator above for the complete breakdown.
Yes — our menopause protein calculator recommends 1.2–1.6g of protein per kg of body weight per day for perimenopausal and postmenopausal women. This is higher than the standard female RDA (0.8g/kg) because estrogen decline during menopause significantly accelerates muscle loss (sarcopenia) and bone density loss. Research shows higher protein intake during menopause: preserves lean muscle mass, improves body composition (more fat loss relative to muscle), enhances bone health when combined with calcium and vitamin D, and may improve hot flash frequency in some women. Combine with resistance training 2–3 times per week for best results. Select "Menopause" mode in our protein calculator above.