This calorie intake calculator tells you exactly how many calories you should eat each day — personalised to your body, your activity level, and your specific goal.
Whether you want to lose weight at a safe pace, build muscle without excess fat, or simply maintain your current weight with the right amount of food, this daily calorie intake calculator gives you a precise number to work from. Not a rough estimate. Not a generic guide. Your number, based on your actual body.
What your calorie intake number means:
This is the number of calories your body needs each day to achieve your selected goal. It is calculated from your total daily energy expenditure — the calories you burn through your resting metabolism plus all your daily activity — then adjusted up or down based on what you are trying to accomplish.
Treat this number as your daily target, not a strict limit. Hitting within 100 calories of your target on most days is sufficient for consistent results. The goal is a sustainable pattern over weeks and months, not a perfect number every single day.
How many calories should you eat per day — and why does it vary so much?
The question of how many calories to eat per day has a different answer for every person — and that answer changes based on your body size, your activity level, and what you are trying to achieve.
Two people of the same age and gender can have daily calorie needs that differ by 600 or more calories. A sedentary office worker and a construction worker of identical height and weight do not need the same amount of food. A person trying to lose weight and a person trying to build muscle do not eat the same number of calories even if they are the same size. A woman and a man of the same weight have different metabolic rates.
This is why generic calorie guides — "eat 1500 calories to lose weight" or "men need 2500 calories" — are so often wrong for the individual. Your calorie intake needs to be calculated from your actual body measurements and your actual lifestyle, not from a population average.
This calculator does exactly that. It uses your weight, height, age, gender, and activity level to calculate your personal daily calorie expenditure, then applies the right adjustment for your goal.
How to calculate calorie intake per day — the method this calculator uses
The calculation happens in two steps. Understanding both helps you trust the result and know when to adjust it.
Step 1 — Calculate your Basal Metabolic Rate (BMR)
BMR is the number of calories your body burns at complete rest — doing nothing except breathing, circulating blood, and keeping your organs running. It is the minimum your body needs just to survive.
This calculator uses the Mifflin-St Jeor equation — the most accurate BMR formula for most adults according to research published in the Journal of the American Dietetic Association.
For men: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) + 5
For women: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) - 161
Step 2 — Multiply by your activity level
Your BMR only accounts for rest. Your actual daily calorie burn — your Total Daily Energy Expenditure (TDEE) — includes everything you do throughout the day. The activity multiplier accounts for this.
Sedentary: BMR x 1.2. Lightly active: BMR x 1.375. Moderately active: BMR x 1.55. Very active: BMR x 1.725. Extra active: BMR x 1.9.
The result is your TDEE — your maintenance calorie level. This is how many calories you need to eat to stay exactly as you are.
Step 3 — Adjust for your goal
Your recommended daily calorie intake is your TDEE adjusted for what you want to achieve:
For weight loss: TDEE minus 300 to 500 calories per day. This creates a deficit that results in gradual, sustainable fat loss without muscle loss.
For maintenance: Eat at your TDEE. Your weight stays stable.
For muscle gain: TDEE plus 200 to 300 calories per day. This small surplus gives your muscles the energy they need to grow without adding unnecessary fat.
Calorie intake calculator for weight loss — what the numbers look like in practice
For weight loss, your daily calorie intake needs to be below your TDEE. The size of the deficit determines the rate of fat loss.
A deficit of 300 calories per day produces approximately 0.3 kg of fat loss per week — slow but very sustainable, with minimal hunger and no muscle loss.
A deficit of 500 calories per day produces approximately 0.5 kg of fat loss per week — the most commonly recommended rate for most people, balancing meaningful progress with manageable restriction.
A deficit of 800 calories or more per day is generally not recommended. At this level, muscle loss accelerates, hunger becomes intense, and the metabolism begins to adapt downward — making the deficit progressively less effective over time.
For most Filipino adults trying to lose weight, a daily calorie intake that creates a 400 to 500 calorie deficit from TDEE is the most practical and sustainable starting point.
One important floor: women should not eat below 1,200 calories per day and men should not eat below 1,500 calories, regardless of what the deficit calculation suggests. Going below these levels consistently causes muscle loss and metabolic slowdown that counterproductive to any weight loss goal.
How to calculate calorie intake for muscle gain
Muscle gain requires a calorie surplus — eating more than you burn so your body has the energy and building materials it needs to create new muscle tissue.
The surplus does not need to be large. Research consistently shows that a surplus of 200 to 300 calories above your TDEE is sufficient for most people to gain muscle at a meaningful rate, while keeping fat gain to a minimum.
A larger surplus — sometimes called a dirty bulk — does accelerate weight gain, but most of the additional weight beyond the 200 to 300 calorie surplus is fat rather than muscle. The body can only build muscle at a certain rate, and the excess calories beyond what muscle growth requires are stored as fat.
Protein intake matters as much as total calories when the goal is muscle gain. Research supports a protein intake of 1.6 to 2.2 grams per kilogram of body weight per day for people engaged in resistance training. For a 65 kg person, this means 104 to 143 grams of protein per day — a target that should be met alongside, not instead of, an appropriate total calorie intake.
Our Macro Calculator helps you split your daily calorie intake into the right amounts of protein, carbohydrates, and fat once you have your total calorie target.
Daily calorie intake calculator — reference ranges for Filipinos
To give you a real-world reference before you calculate your own number, here are typical recommended daily calorie intakes based on average Filipino body measurements.
Average Filipino male (age 25, 65 kg, 165 cm, lightly active):
Weight loss target: approximately 1,650 calories per day. Maintenance: approximately 2,150 calories per day. Muscle gain target: approximately 2,400 calories per day.
Average Filipino female (age 25, 55 kg, 155 cm, lightly active):
Weight loss target: approximately 1,250 calories per day. Maintenance: approximately 1,700 calories per day. Muscle gain target: approximately 1,950 calories per day.
These are reference points only. Your personal number from the calculator above is the one that matters — it accounts for your actual weight, height, age, and activity level rather than population averages.
How to use your daily calorie intake number
Having a daily calorie target is the starting point. Using it effectively over time is what produces results.
Start with a two-week trial
Treat your calculated calorie intake as a starting point, not a permanent rule. Eat at your calculated intake for two to three weeks and track your body weight consistently — weigh yourself at the same time each day, ideally in the morning before eating.
If your weight is moving in the right direction at the expected rate, your calculated intake is working. If it is not moving, or moving too fast or too slow, adjust by 100 to 200 calories in the appropriate direction and run another two-week trial.
Track weekly averages, not daily numbers
Body weight naturally fluctuates by 1 to 2 kilograms from day to day due to water retention, food volume, and other factors that have nothing to do with fat. Looking at your weight on a single day can be misleading.
Instead, compare your average weight over one week to your average over the previous week. A consistent downward trend in the weekly average — even with some up-and-down daily variation — confirms your calorie intake is working for weight loss.
Recalculate as your body changes
As your weight changes, your calorie needs change. A person who has lost 8 kilograms has a meaningfully lower TDEE than they did before — which is one reason weight loss often slows or stalls without any change in behaviour.
Recalculate your recommended daily calorie intake every four to six weeks, or whenever your body weight shifts by 3 to 5 kilograms. This keeps your intake aligned with your actual current body rather than the body you started with.
Why your calorie intake might not match your expectations
If your calculated intake feels surprisingly low or surprisingly high, there are a few reasons that commonly explain the gap between expectation and calculation.
Activity level overestimation is the most frequent. Most people who describe themselves as moderately active are, by the clinical definition, lightly active. Occasional gym visits, a daily walk, and a desk job is lightly active — not moderately active. Selecting an activity level one step lower than your instinct gives a more accurate result for most people.
Muscle mass differences affect BMR. Two people of the same weight can have significantly different BMRs if one carries more muscle than the other. Muscle tissue burns more calories at rest than fat tissue, so a person with higher muscle mass has a higher BMR and TDEE at the same body weight. This calculator uses standard population formulas that may slightly underestimate TDEE for very muscular individuals.
Metabolic adaptation can lower actual TDEE below calculated TDEE. People who have been on very low-calorie diets for extended periods may have a reduced metabolic rate that is lower than the formula predicts. If you have been severely restricting calories for months or years, your actual calorie needs may be lower than this calculator shows until metabolic function recovers.
Frequently asked questions
How do I calculate my daily calorie intake?
Calculate your BMR using the Mifflin-St Jeor formula, multiply by your activity level to get your TDEE, then adjust for your goal — subtract 300 to 500 for weight loss, eat at TDEE for maintenance, or add 200 to 300 for muscle gain. Our calorie intake calculator does all of this automatically. Enter your weight, height, age, gender, and activity level, select your goal, and your personalised daily calorie intake appears instantly
How many calories per day do I need to lose weight?
You need to eat fewer calories than you burn each day. For most people, eating 300 to 500 calories below your TDEE produces sustainable fat loss of 0.3 to 0.5 kg per week.
The exact number depends on your TDEE, which depends on your body size and activity level. Use the calculator above to find your personal weight loss calorie target — do not rely on generic numbers that do not account for your individual body.
What is a safe daily calorie intake for women?
For women, the minimum safe daily calorie intake is generally considered to be 1,200 calories. Below this level, it becomes very difficult to meet nutritional needs for vitamins, minerals, and protein, and muscle loss accelerates significantly.
For most active Filipino women trying to lose weight, a daily intake between 1,200 and 1,600 calories is the typical range — but your specific number depends on your weight, height, age, and activity level. Use the calculator for your personal recommendation.
How many calories do I need to build muscle?
To build muscle, you need to eat slightly more calories than you burn — typically 200 to 300 calories above your TDEE. This surplus, combined with consistent resistance training and adequate protein intake, supports muscle growth while minimising fat gain.
Protein intake is equally important. Aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day alongside your calorie surplus to maximise muscle building.
Should I eat the same calories every day?
You do not have to — and for most people, rigid daily consistency is neither practical nor necessary. What matters for results is your weekly average calorie intake rather than hitting an exact number every single day.
Eating slightly more on active days and slightly less on rest days, or eating more on weekends and less on weekdays, is a legitimate approach as long as your weekly total stays close to your weekly target.
Related calculators
Your daily calorie intake is the starting point. These calculators help you build everything around it:
TDEE Calculator — Calculate your Total Daily Energy Expenditure — the maintenance calorie number your intake is based on. Essential first step if you do not already know your TDEE.
BMR Calculator — Find your Basal Metabolic Rate — the calories your body burns at complete rest and the foundation beneath your TDEE.
Calorie Deficit Calculator — Turn your TDEE into a specific daily deficit for weight loss, with your exact calorie target for each pace of loss.
Macro Calculator — Split your daily calorie target into the right amounts of protein, carbohydrates, and fat for your specific goal.
Body Fat Percentage Calculator — Track your actual body composition alongside your calorie intake to ensure you are losing fat rather than muscle.
Ideal Weight Calculator — Set a healthy target body weight to work toward with your personalised calorie intake plan.