A calorie surplus means eating more calories than you burn. This extra energy fuels muscle protein synthesis and supports weight gain.
Calorie surplus sizes and expected outcomes
| Surplus | Weekly gain | Composition |
|---|---|---|
| 250 calories | 0.5 lb/week | Mostly muscle |
| 500 calories | 1 lb/week | Mixed muscle/fat |
| 1,000 calories | 2 lb/week | Significant fat gain |
Our maintenance calorie calculator finds your baseline.
How to calculate your calorie surplus
- Find your TDEE (maintenance calories)
- Add 250–500 calories for a lean bulk
- This is your daily eating target
- Use the calorie calculator with gain goal for automation
Clean bulk vs dirty bulk comparison
| Aspect | Clean bulk | Dirty bulk |
|---|---|---|
| Surplus size | 250–500 calories | 500–1,000+ calories |
| Food quality | Nutrient-dense whole foods | Processed/high-calorie foods |
| Weekly gain | 0.25–0.5 lb | 1–2 lb |
| Body fat gain | Minimal | Significant |
| Recommended for | Most people, especially beginners | Hardgainers under expert supervision |
Macronutrients for muscle gain
| Macro | Recommended intake |
|---|---|
| Protein | 1.6–2.2 g/kg body weight |
| Fat | 20–30% of total calories |
| Carbs | 45–55% (fills remaining calories) |
Use our protein calculator and macro calculator.
Calorie surplus foods for muscle
| Food | Calories per serving | Protein |
|---|---|---|
| Oats (1 cup dry) | 300 | 10 g |
| Brown rice (1 cup cooked) | 220 | 5 g |
| Salmon (4 oz) | 220 | 22 g |
| Banana (1 medium) | 105 | 1 g |
| Nuts (1 oz) | 170 | 6 g |
| Greek yogurt (1 cup) | 130 | 23 g |
Search exact values with our food calories search.
Adjusting your calorie surplus
After 3–4 weeks:
- Not gaining: Increase by 100–200 calories
- Gaining too fast (>1 lb/week): Reduce surplus
- Excessive fat gain: Lower surplus or increase activity
Recalculate maintenance with TDEE calculator if weight changed significantly.
Signs you're in a good calorie surplus
- Steady weight gain (0.25–0.5 lb/week)
- Improved workout performance
- Adequate energy for daily activities
- Better sleep quality