How much protein do vegans actually need?
For most plant-based adults, the sweet spot is 1.2 to 1.6 grams of protein per kilogram of bodyweight per day — well above the bare-minimum RDA of 0.8 g/kg. If you lift weights or train hard, push toward 1.6–2.0 g/kg. The calculator above does this for you, then nudges to the upper end of your band because most single plant proteins are slightly less digestible than animal protein.
Quick answer
Aim for 1.2–1.6 g/kg if active, 1.6–2.0 g/kg to build muscle. Spread it across 3–4 meals of roughly 20–40 g each.
How this calculator works
We start from your bodyweight and apply an evidence-based multiplier from the ISSN position stand on protein and exercise and the RDA baseline, then adjust for your goal:
| Activity | Protein target | Definition |
|---|---|---|
| Sedentary | 1.0 g/kg | Little or no exercise |
| Light | 1.2 g/kg | Exercise 1–3 days/week |
| Moderate | 1.4 g/kg | Exercise 3–5 days/week |
| Active | 1.6 g/kg | Exercise 6–7 days/week |
| Athlete / building | 1.8–2.0 g/kg | Hard training or muscle gain |
Protein in common vegan foods
Per typical serving (USDA FoodData Central).
| Food | Serving | Protein |
|---|---|---|
| Tofu (firm) | ½ cup (126 g) | 21 g |
| Lentils (cooked) | 1 cup (198 g) | 18 g |
| Tempeh | ½ cup (83 g) | 17 g |
| Seitan | 85 g | 21 g |
| Edamame | 1 cup (155 g) | 18 g |
| Chickpeas (cooked) | 1 cup (164 g) | 15 g |
| Black beans (cooked) | 1 cup (172 g) | 15 g |
| Soy milk | 1 cup (240 ml) | 8 g |
| Peanut butter | 2 tbsp (32 g) | 7 g |
| Quinoa (cooked) | 1 cup (185 g) | 8 g |
Common questions
Is plant protein as good as animal protein?
Yes, when total intake is adequate and sources are varied. Most single plant proteins are slightly lower in one or two essential amino acids and a little less digestible, but eating a mix across the day (soy, legumes, grains, nuts) easily covers all nine essential amino acids. Soy and quinoa are complete proteins on their own.
Can you build muscle on a vegan diet?
Absolutely. Studies show muscle growth is equal when protein intake and resistance training are matched. Aim for the higher end of your range (around 1.6–2.0 g per kg of bodyweight) and spread it across 3–4 meals of 20–40 g each.
Do I need protein powder?
No — whole foods like tofu, tempeh, seitan, lentils and soy milk can hit most targets. Powder (pea, soy, rice blends) is simply convenient if you train hard or struggle to eat enough whole-food protein.
How is this calculated?
We apply g-per-kilogram multipliers from the International Society of Sports Nutrition (ISSN) position stand and the RDA baseline of 0.8 g/kg, adjusted for your activity level and goal, and nudged to the upper band to account for the slightly lower digestibility of plant proteins.
