Meal Calorie Calculator
Enter your daily calorie goal and choose how many meals you eat per day. The calculator splits that total into per-meal targets using research-backed percentage ranges for breakfast, lunch, dinner and optional snacks. Prefer to find your calorie target first? Switch on "Calculate my TDEE" and enter your height, weight, age, sex, and activity level to get a Mifflin-St Jeor estimate before the split.
How to use this calculator
Start by choosing your calorie source. If you already know your daily target from a dietitian, fitness app, or another calculator, select "I already know my daily calories" and enter the number. If you want to estimate it here, choose "Calculate my TDEE from my stats" and fill in your sex, age, height, weight, and activity level. You can also pick a goal adjustment: a daily deficit of 250-500 kcal supports steady fat loss, while a surplus of the same size supports muscle gain. Then choose how many meals you eat per day. The calculator outputs a calorie target for each meal using the percentage ranges in the table below, so you can build a simple day-by-day meal plan.
How daily calories are split across meals
The percentage ranges used here are drawn from sports nutrition and obesity-medicine guidelines. Breakfast accounts for 25-35% of daily intake; skipping it or eating too little at breakfast often leads to overconsumption later in the day. Lunch is the largest meal in most recommendations, at 30-40%. Dinner is sized to close the remaining gap, typically 20-35%, and is deliberately kept lower than lunch because metabolic rate and insulin sensitivity tend to decline in the evening. Snacks, when included, are kept small at 5-10% each, enough to prevent hunger between meals without displacing the next meal. The midpoint of each range is used as the target, with the full range shown so you can shift calories toward meals where you are genuinely hungrier.
Estimating your calorie need: the Mifflin-St Jeor formula
When you choose the TDEE mode, the calculator uses the Mifflin-St Jeor equation, published in 1990 and validated as the most accurate predictive formula for resting energy expenditure in non-obese adults. For males: BMR = 10W + 6.25H - 5A + 5. For females: BMR = 10W + 6.25H - 5A - 161. In both formulas, W is weight in kilograms, H is height in centimetres, and A is age in years. This Basal Metabolic Rate is then multiplied by an activity factor ranging from 1.2 (sedentary) to 1.9 (very active) to get your Total Daily Energy Expenditure. A goal adjustment of -500 to +500 kcal is then applied depending on whether you want to lose, maintain, or gain weight.
Tips for hitting your per-meal targets
Think of each meal target as a range, not a precise number. A variance of plus or minus 10% from your meal target is completely normal and lets you respond to hunger and satiety signals. To make hitting targets easier, learn the calorie density of a few anchor foods in each major category: a palm-sized portion of cooked chicken breast is about 165 kcal, a cup of cooked white rice is about 200 kcal, a tablespoon of olive oil is about 120 kcal, and a medium apple is about 95 kcal. Building meals around these anchors and then adjusting portions is faster and more sustainable than weighing every ingredient. If you consistently land short at breakfast and over at dinner, try moving 100-150 kcal from dinner to breakfast for a week and reassess.
Recommended meal calorie distributions
| Meal frequency | Breakfast | Lunch | Dinner | Each snack |
|---|---|---|---|---|
| 3 meals/day | 30-35% | 35-40% | 25-35% | n/a |
| 4 meals/day | 25-30% | 35-40% | 25-35% | 5-10% |
| 5 meals/day | 25-30% | 30-35% | 20-25% | 5-10% |
Evidence-based percentage ranges showing how to spread daily calories across meals. Ranges account for individual variation in hunger patterns.
Frequently asked questions
How many calories should each meal be?
It depends on your total daily calorie goal and the number of meals you eat. A common starting point for three meals is: breakfast 30-35% of daily calories, lunch 35-40%, and dinner 25-35%. On a 2000 kcal/day target that works out to roughly 630, 750, and 625 kcal. For four or five meals the proportions shift to accommodate one or two small snacks of 5-10% each.
Should I eat more calories at breakfast or dinner?
Research generally supports front-loading calories: eating a larger breakfast and moderate lunch tends to improve satiety and blood sugar control compared with eating most calories at dinner. A 2013 trial in Obesity found that participants who ate a large breakfast lost 2.5 times more weight than those who ate the same calories with a large dinner over 12 weeks. That said, the total daily intake matters most, and the best distribution is one you can consistently follow.
What is TDEE and how is it different from BMR?
Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest, sustaining basic functions like breathing and circulation. Total Daily Energy Expenditure (TDEE) adds the calories burned through all physical activity - exercise, walking, fidgeting, and everything else. TDEE is what you actually need to eat to maintain your weight, so it is the correct starting point for any calorie goal. This calculator multiplies your BMR (from the Mifflin-St Jeor formula) by an activity factor to estimate your TDEE.
How accurate is the Mifflin-St Jeor formula?
The Mifflin-St Jeor equation is considered the most accurate prediction formula for most non-obese adults, with a typical error of about 10% in either direction. It can underestimate needs for people with a high muscle mass and overestimate for people with very low muscle mass or severe obesity. Treat the output as a starting point: if your weight stays stable over two to three weeks while eating to your TDEE estimate, the estimate is approximately correct. If you gain or lose weight unexpectedly, adjust by 100-200 kcal and reassess.
Is it better to eat 3, 4, or 5 meals a day?
Research comparing meal frequency has not found a consistent advantage for any particular number when total daily calories and protein are matched. Three meals per day is the most common pattern and works well for most people. More frequent meals can help people who struggle with hunger between meals, or athletes managing high calorie targets across the day. Fewer, larger meals may suit people who prefer the satiety of larger portions. Choose the pattern that fits your schedule and that you can sustain.
What is a safe calorie deficit for weight loss?
A deficit of 250-500 kcal per day is widely recommended as a sustainable range. A 500 kcal daily deficit produces roughly 0.45 kg (1 lb) of fat loss per week. Deficits larger than 500-750 kcal per day can lead to muscle loss, nutrient deficiencies, fatigue, and reduced metabolism, and are typically only appropriate under medical supervision. Very low calorie diets (below 800 kcal/day) should never be followed without a doctor.
Can I use this calculator for macro planning?
This calculator gives you calorie targets per meal. To turn those into macros, decide on your protein, fat, and carbohydrate split. A common starting point is 30% protein, 30% fat, and 40% carbohydrates. One gram of protein yields 4 kcal, one gram of carbohydrate yields 4 kcal, and one gram of fat yields 9 kcal. Divide your per-meal calorie target by those yields at your chosen percentages to get grams of each macro per meal.