Bulking Calculator
Calculate your daily energy expenditure, target caloric surplus, and exact macro splits for optimal lean muscle growth.
Target Bulking Targets
Clean bulk (+300 kcal)
Anchored at 1.0g/lb
Hormonal health support
Glycogen & energy
Why a Unified Bulking Calculator?
Finding the right macro split for bulking starts with determining your Total Daily Energy Expenditure (TDEE). In order to trigger hypertrophy and synthesize new muscle tissue, your body requires more energy than it consumes (a caloric surplus). However, simply "dirty bulking" (eating without boundaries) leads to excessive fat deposition.
Nulls Tracker calculations are based on the industry-standard **Mifflin-St Jeor formula**[1] for TDEE, adjusted for active resistance training. A clean surplus of +300 calories provides ample raw building blocks for muscle synthesis while keeping fat accumulation to a minimum.
From there, your macronutrients are carefully divided: we anchor your daily protein goals to exactly **1.0g per pound of body weight**[2] to ensure optimal muscle protein synthesis (MPS). The remaining calories are split between dietary fats (essential for testosterone and hormone support) and clean carbohydrates (vital for refueling muscle glycogen stores and power output).
Scientific References
- Mifflin, M. D., St Jeor, S. T., et al. (1990). A new predictive equation for resting energy expenditure in healthy individuals. The American Journal of Clinical Nutrition, 51(2), 241-247.
- Morton, R. W., et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine, 52(6), 376-384.
🤖 Next Step: Track Your Macros with AI
Now that you have your target calories and macro splits, hitting them consistently is the key to muscle growth. Manually searching databases for every ingredient you eat is tedious and often leads to tracking burnout.
With Nulls Tracker, you can skip the search bar entirely. Just snap a photo of your meal or type a quick description (like "2 cups of rice and 8oz chicken breast"), and our in-app AI instantly logs the calories and macros for you.