Maintenance Calorie Calculator

What Are Maintenance Calories?

Maintenance calories are the number of calories you need to consume each day to keep your current body weight stable. Your body uses energy for every breath, heartbeat, digestion step, and physical movement. When your calorie intake equals that total energy expenditure, your weight neither goes up nor down–that’s maintenance.

This exact number is also called Total Daily Energy Expenditure (TDEE). TDEE consists of:

• Basal Metabolic Rate (BMR) – the energy your body burns at complete rest to sustain vital functions (breathing, circulation, cell repair). BMR accounts for 60–75 % of total daily burn.
• Thermic effect of food (TEF) – calories used to digest and absorb nutrients, roughly 10 % of intake.
• Physical activity – all movement, from walking to the mailbox to an intense workout. The largest variable component.

Knowing your maintenance calories removes the guesswork from eating. Instead of following generic plans, you have a science-backed target tailored to your body.

Why Does Knowing Your Maintenance Calories Matter?

Finding your exact maintenance calorie number is the foundation of smart weight management. Without it, you’re navigating blindfolded–you might overeat and gain weight or undereat and lose muscle.

Here’s what a maintenance calorie target lets you do:

• Stabilize your weight after a diet or bulk. Many people regain lost pounds because they return to old eating patterns without a clear number.
• Set realistic goals for weight loss or muscle gain. A daily deficit of 300–500 calories below maintenance leads to gradual, sustainable fat loss. A surplus of the same size supports lean muscle growth with minimal fat gain.
• Avoid metabolic adaptation. Prolonged very low‑calorie intake can lower your BMR. Eating at maintenance for several weeks after a diet can help restore your metabolism.
• Fine‑tune performance nutrition. Athletes and active individuals use maintenance calories as the baseline for fueling workouts and recovery without weight fluctuations.

How to Calculate Maintenance Calories

There’s a straightforward, three‑step process that almost every modern calculator–including the one on this page–follows. You first estimate your BMR, then adjust for your activity level, and the result is your maintenance calorie target.

Step 1: Calculate Your Basal Metabolic Rate (BMR)

BMR is calculated using validated equations that account for your weight, height, age, and sex. Among those, the Mifflin‑St Jeor equation is widely considered the most reliable for non‑obese adults and is the standard as of 2026:

For men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5

For women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) − 161

Example: a 35‑year‑old woman weighing 68 kg and 165 cm tall has a BMR of roughly
(10×68) + (6.25×165) − (5×35) − 161 = 1,375 kcal/day.

Other formulas exist (Harris‑Benedict, Katch‑McArdle), but Mifflin‑St Jeor delivers the best balance of accuracy and simplicity for the general population. If you know your body fat percentage, the Katch‑McArdle equation can be even more precise, yet it requires a reliable fat‑measurement method.

Step 2: Determine Your Activity Level

Your total daily burn depends on how much you move. Activity level is expressed as a multiplier:

Be honest with your selection–it’s easy to overrate activity. If you have a desk job but exercise 4 times a week, “moderately active” is usually the right choice, not “very active.”

Step 3: Multiply BMR by the Activity Factor

TDEE = BMR × Activity Multiplier

Continuing the example: the 35‑year‑old woman with a BMR of 1,375 kcal and a moderately active lifestyle would have
TDEE = 1,375 × 1.55 = 2,131 kcal/day. That’s her maintenance calorie intake–the number of calories she needs each day to stay at 68 kg.

Maintenance Calorie Calculator: Instant TDEE Estimation

You can skip the manual math. Use the calculator below to get your maintenance calories in seconds–the same Mifflin‑St Jeor equation runs the computation.

Simply enter your sex, age, weight (in kilograms or pounds), height (in centimeters or feet/inches), and select your typical activity level. The calculator instantly returns your estimated TDEE–the calories you need to maintain your current weight.

It’s a starting point. Real‑world factors like muscle mass, genetics, and non‑exercise activity (fidgeting, posture) can shift your true maintenance by up to 10–15%. That’s why the next step is crucial.

Fine‑Tuning Your Maintenance Calories

No equation is perfect. Even the best BMR formula is a population‑average estimate, and your unique body may burn slightly more or less. To dial in your real maintenance number:

1. Eat at the calculated TDEE for two weeks. Track every calorie as accurately as possible (weighing food is best).
2. Weigh yourself at the same time each day (morning, after using the bathroom, before eating). Focus on the weekly trend, not daily fluctuations.
3. If your weight stays within ±0.3 kg, that intake is your true maintenance.
4. If weight creeps up, reduce daily calories by 100–200 kcal and monitor another week.
5. If weight drops, increase daily calories by the same amount.

After a month of tracking and adjusting, you’ll have a highly individualized maintenance target that can serve as your permanent baseline.

From Maintenance to Weight Goals

Once you’ve locked in your maintenance calories, you can adjust them to achieve any goal:

• Sustainable fat loss: Subtract 300–500 kcal from your TDEE. This yields a loss of about 0.25–0.5 kg per week without extreme hunger.
• Lean muscle gain: Add 300–500 kcal to your TDEE, with an emphasis on protein (1.6–2.2 g per kg of body weight) and strength training.
• Recomposition: Eat at maintenance while following a structured resistance‑training program. You can slowly build muscle and lose fat, though progress is slower.

Remember that as your weight changes, your maintenance calorie needs change too. Recalculate every 2–3 kg of weight change or whenever your activity level shifts substantially.

This calculator provides estimates based on standard equations. Individual metabolism varies. Consult a registered dietitian or healthcare professional for personalized nutrition advice.