Bulk planning: how many calories do I need to gain muscle?
The Bulk Planner gives you a controlled lean-bulk plan — a moderate calorie surplus, realistic weekly targets and clear checkpoints.
Your plan
Suggested calorie intake
2,940–3,090 kcal
Estimated maintenance: 2,744 kcal
Daily macronutrients
Protein
140–172 g
1.8–2.2 g per kg of bodyweight.
Fat
62–78 g
0.8–1.0 g per kg of bodyweight.
Carbohydrates
410–470 g
Remaining energy from carbohydrates.
Expected weekly change
0.23–0.31 kg/week
(0.30–0.40 %)
Planning window
12 weeks
Weekly plan & checkpoints
Daily — Morning fasted weight (weekly average)
Log it — day-to-day swings are normal.
Weeks 1–2 — Tolerance and energy levels
If you feel sluggish or stuffed, wait another week before changing anything.
Week 3 — Weekly average vs. starting weight
Well below 0.23 kg/week? Add 100 kcal.
Week 3 — Weekly average vs. starting weight
Well above 0.31 kg/week? Subtract 100 kcal.
Weekly — Strength on the main lifts
Rising strength can be a useful trend signal; also judge bodyweight, training quality and how you feel.
When to adjust
- Change calories in 100 kcal steps — never react to a single day.
- A very large surplus does not speed up muscle growth. It mainly adds body fat.
- If fat climbs faster than strength, drop 100–150 kcal before touching protein.
- Full-cycle target range: 2.8–3.7 kg over 12 weeks.
Example trajectory (illustrative)
Example (illustrative): starting at 78 kg, moderate pace, 12 weeks.
Calorie range ~2,900–3,050 kcal/day, ~2.4 kg gain (range 2.1–2.8 kg).
Squat and deadlift climb slightly week over week, waist stays largely flat.
This result is a sensible starting point, not a fixed target. Watch your real progress and adjust step by step if needed.
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Model note
Planning model, not medical clearance
Calorie ranges, target pace and time windows are modelled starting values based on estimated maintenance and internal planning rules. Product guardrails stop the tool from automatically generating progressively lower targets, but they are not universal medical safety thresholds. Your real multi-week trend remains the deciding reference.
Method
How the calculation works
Age, height, weight, sex and activity are used to estimate maintenance with Mifflin-St Jeor plus an activity factor. The result is a starting estimate, not a measurement.
Depending on the selected pace, the planner adds an internal range of roughly 150–400 kcal per day. The resulting bodyweight target is a monitoring goal, not a prediction of how much muscle or fat will actually be gained.
Protein, fat and carbohydrate ranges are practical planning anchors. What matters is how bodyweight, training, digestion, hunger and well-being develop over several weeks.
Estimate confidence
How reliable is this estimate?
Medium
The plan is based on your estimated maintenance needs. How much of the weight gain arrives as muscle also depends on training, recovery and training experience.
Context
When this planner makes sense
When you want to build muscle deliberately over several months, train with weights regularly and are willing to let your weight rise slowly.
It also fits if you have eaten without a plan so far and are looking for a traceable starting point.
Context
Who this planner is not for
If you are under 18, pregnant or breastfeeding, follow medical dietary instructions or are being treated for a health condition, please discuss your nutrition with a doctor first.
And if your current goal is primarily fat loss, the Cut Planner is the better fit for you.
Common mistakes
Common mistakes when running the plan
- 01Starting the plan without noting your starting weight and strength numbers – the comparison is missing later on.
- 02Skipping the weekly checkpoints and simply carrying on by feel.
- 03Leaving the plan unchanged for months even though weight is rising much faster or slower than planned.
- 04Tracking only bodyweight and ignoring how training is developing.
- 05Continuing the old plan unchanged after a week of illness or holiday instead of briefly re-assessing.
Interpretation
How to read your plan
The calorie range is the starting point. What you want to see is a weekly average weight climbing inside the suggested corridor — not a specific number on any single day.
As long as strength on the main lifts is rising and weekly weight sits inside the range, the bulk is productive. If the scale rises much faster, trim calories in small steps.
Limits
Where this planner ends
Estimated TDEE can differ substantially for an individual, especially because of the broad activity factor and changing daily movement.
Bodyweight gain cannot be equated directly with muscle gain. Training age, training stimulus, genetics, sleep and starting point all affect body composition.
The planner is intended as a general planning tool for adults and does not replace individualized medical or nutrition advice.
FAQ
Frequently asked questions
How large is the surplus in this model?
Depending on the selected pace, roughly 150–400 kcal per day above estimated maintenance. It is a starting range, not an individually validated optimum.
Is 0.25–0.5 % bodyweight gain per week ideal?
Not universally. The range is used here as a conservative monitoring target. Training age, starting weight and actual body composition all affect what pace is useful.
Does rising bodyweight automatically mean muscle gain?
No. Bodyweight includes muscle, fat, water, glycogen and gut contents. Judge the trend together with training and body measurements.
When should I adjust calories?
Only after several consistent weeks. If the trend clearly sits outside the selected planning range, small changes are more useful than large reactions.
How long should a gaining phase last?
There is no universal calendar duration. Use a period long enough to judge training, weight trend and well-being, and regularly reassess whether the goal still fits.
More
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Guide
Muscle-Building Fundamentals: How Muscles Actually Grow
Muscles don't grow from hard training alone. Successful muscle growth comes from the interaction of sufficient training stimulus, appropriate nutrition, good recovery and long-term consistency. Training creates the stimulus. Nutrition supplies energy and building blocks. Recovery is where your body processes the workload and adapts. If one of these is consistently missing, muscle growth falls short of its potential.
Related glossary terms
If food, weight or body image weigh on you, please talk to a doctor or qualified professional.
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