Bulking Calorie Calculator
Whether you're looking to put on healthy mass, overcome a fast metabolism, or dive into a dedicated muscle-building bulk, find your exact daily caloric targets.
Bulking Calculator
Nutrition Targets
How to Gain Weight Safely with a Surplus
Most nutritional calculators on the internet are geared heavily towards weight loss and dieting. However, purposely gaining weight—often called 'bulking' in fitness spaces or necessary for recovery after illness—relies on the same thermodynamics: eating more than you burn. Consuming a specific, calculated Caloric Surplus is the only way to trigger weight gain.
Why a +500 Calorie Surplus?
The biological rule of thumb is that gaining roughly half a kilogram (about 1lb) of weight requires approximately an extra 3,500 calories over a week.
A +500 kcal surplus is generally considered the "sweet spot" for men looking to put on muscle without gaining excessive fat. For women, a slightly lower surplus of +250 to +300 is often recommended. If you go much higher than this (a 'dirty bulk'), your body cannot use the excess energy for muscle synthesis quickly enough, and the spillover is stored directly as fat.
The Power of Macronutrients
Just hitting a calorie target technically makes you gain weight. But if you want that weight to be muscle tissue rather than just exclusively fat, you must pay attention to macros alongside a vigorous resistance training regime.
Protein: The Builder
Critical for muscle repair. Aim for 1.6g to 2.2g per kg of bodyweight.
Carbs: The Fuel
Fills the rest of your diet to provide intense energy for the gym and prevent fatigue.
Fats: The Regulator
Helps regulate vital hormones like testosterone. Very calorie-dense (9 kcal/g).