🔥 BMR Calculator for Men
Calculate your Basal Metabolic Rate, daily calorie needs and macro targets — optimised for men's fitness goals. Free, instant, no signup.
BMR for Men — How It Works
Men's Basal Metabolic Rate is calculated using the Mifflin-St Jeor formula: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5. The +5 constant at the end is what distinguishes the male formula from the female one (which uses −161). This difference reflects the fact that men, on average, carry more muscle mass and less fat than women of the same weight and height — and muscle tissue burns more calories than fat even at rest.
Men's BMR is typically 5–10% higher than women's of the same age, weight and height. A 30-year-old man at 75 kg and 175 cm has a BMR of approximately 1,783 calories per day. Multiply this by his activity factor to get TDEE — the actual number of calories he burns each day.
BMR and Muscle Building
Building muscle (hypertrophy) requires two things: a calorie surplus and sufficient protein. A modest surplus of 300–500 calories above TDEE is generally optimal — large surpluses do accelerate muscle gain slightly, but also add more body fat. The goal of a lean bulk is to maximise muscle gain while minimising fat accumulation.
Protein is the most important macronutrient for muscle growth. Research consistently shows that men need at least 1.6 g of protein per kg of body weight per day to maximise muscle protein synthesis, and up to 2.2 g/kg during a bulk phase is well-supported. This calculator uses 2.2 g/kg for maintenance and bulk goals — a conservative but effective target for most men.
- Lean bulk: TDEE + 500 cal — optimal for building muscle while keeping body fat low
- Fast bulk: TDEE + 1000 cal — faster mass gain but expect significant fat gain
- Protein target during bulk: 2.0–2.2 g per kg body weight per day
- Distribute protein evenly across 3–5 meals for optimal muscle protein synthesis
- Carbohydrates fuel workouts — prioritise them around training sessions
Cutting vs Bulking Calories for Men
A successful cut maintains muscle while losing fat. The key is keeping protein high — this calculator uses 2.5 g/kg during a cut, which is higher than maintenance because protein needs increase when calories are restricted. Studies show that men eating 2.3–3.1 g/kg of protein while in a deficit retain significantly more muscle than those eating standard amounts.
A calorie deficit of 500 cal/day produces approximately 0.5 kg of fat loss per week — the gold standard for most men who want to preserve muscle. A 1,000 cal/day deficit can work for men with significant excess body fat but should be approached carefully and is not recommended for lean men (below 15% body fat).
- Moderate cut (−500 cal): lose ≈ 0.5 kg/week — best for preserving muscle
- Aggressive cut (−1000 cal): lose ≈ 1 kg/week — suitable for heavier men
- Never go below 1,500 cal/day without medical supervision
- Protein during a cut: 2.2–2.5 g per kg — critical for muscle retention
- Keep resistance training up during a cut — muscle is lost when you stop lifting, not when you eat less
Frequently Asked Questions
What is a good BMR for men?
A good BMR for men depends on age, height and weight. An average man aged 25–35 has a BMR of 1,700–2,000 calories per day. Taller or heavier men naturally have higher BMRs — a 90 kg man at 180 cm may have a BMR over 2,000. There is no universal "good" number — what matters is knowing your specific BMR so you can calculate your TDEE (daily calorie needs) accurately.
How many calories do men need to lose weight?
Men should eat 500–1,000 calories below their TDEE to lose weight. A 500 cal/day deficit produces roughly 0.5 kg of fat loss per week. A 1,000 cal/day deficit produces roughly 1 kg/week and is better suited for men with higher body fat. Men should not eat fewer than 1,500 calories per day without medical guidance. High protein intake (2.2–2.5 g/kg) is essential during a cut to preserve muscle mass.
How many calories do men need to build muscle?
Men need a calorie surplus above TDEE to build muscle consistently. A lean bulk of TDEE + 300–500 calories per day maximises muscle gain while limiting fat accumulation. A fast bulk of TDEE + 1,000 calories grows mass faster but also gains more fat. Protein intake should be 2.0–2.2 g per kg of body weight daily, supported by consistent resistance training. Beginners can often build muscle even in a slight deficit (body recomposition).
What is the average BMR for Indian men?
An average Indian man aged 25–35 weighing 65–75 kg at 165–175 cm has a BMR of approximately 1,600–1,850 calories per day using the Mifflin-St Jeor formula. With a moderate activity level (multiplier 1.55), TDEE works out to roughly 2,480–2,870 calories per day. A typical Indian diet of rice, roti, dal and sabzi can comfortably meet these targets — one roti provides approximately 120 calories, so your BMR in rotis is a useful everyday reference.
How does age affect BMR in men?
Men's BMR declines by approximately 1–2% per decade after age 20, primarily due to gradual loss of muscle mass (sarcopenia). A man at age 40 may burn 100–150 fewer calories per day at rest compared to age 20 if muscle mass has not been maintained. This is why middle-aged men often find it harder to maintain weight on the same diet they had in their 20s. Resistance training 2–3 times per week is the most effective way to slow this metabolic decline by preserving lean muscle mass.