Maintenance Calories

What Are Maintenance Calories?

Maintenance calories are the number of calories you can eat each day without gaining or losing weight. Eat roughly that amount, day after day, and your weight stays where it is. Eat consistently more, and it climbs. Eat consistently less, and it falls.

That sounds obvious, but it is the single most useful number in everyday nutrition — because most people do not actually want a diet plan. They want to know where “normal” sits for them, so they can eat freely inside it and notice early when they drift outside it.

Our calculator above works that number out for you. Enter your age, gender, weight, height, and how active you are, and it gives you three figures: your daily maintenance calories, your BMR (the calories you would burn lying still all day), and your weekly maintenance total. Nothing is stored or sent anywhere — the math runs entirely in your browser.

Energy Balance, in Plain Terms

Your body burns energy all day: keeping you warm, digesting food, walking to the kitchen, working out. The total is your maintenance level. Think of it as a budget. Your food is the income. When income matches spending, the balance stays flat, and so does your weight.

Two details make this practical rather than theoretical. First, the balance works over weeks, not single days — one big meal does not change anything, and neither does one light day. Second, your spending changes when your life changes: a new desk job, a new training routine, or ten pounds lost all move the number, which is why it is worth rechecking every few months.

The Formula

The calculator uses the Mifflin-St Jeor equation for BMR, then multiplies by an activity factor:

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

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

Maintenance calories = BMR × activity multiplier

The multipliers are 1.2 for sedentary, 1.375 for lightly active, 1.55 for moderately active, 1.725 for very active, and 1.9 for extra active.

A worked example: a 30-year-old man, 80 kg and 180 cm, moderately active. His BMR is 800 + 1,125 − 150 + 5 = 1,780 calories. Multiply by 1.55 and his maintenance level is 2,759 calories a day — about 19,313 a week. That is the intake at which his weight should hold steady.

Why Your Number Changes Over Time

Maintenance calories are not a fixed label; they move with you, for four main reasons.

Weight change. A lighter body burns less. Lose ten pounds and your maintenance level drops by roughly 50–100 calories a day — small, but enough to stall further progress if you keep eating the old amount.

Age. BMR drifts down slowly with age, mostly because muscle mass declines. The change is gradual — a few dozen calories per decade — but it is real, and it is one reason old eating habits quietly stop working.

Activity change. This is the biggest lever. Going from a desk job to a job on your feet, or from two gym sessions a week to five, can move your maintenance level by several hundred calories.

Muscle mass. Muscle burns more than fat even at rest, so two people of the same weight can have noticeably different maintenance levels. This is also why the formula is an estimate: it cannot see your body composition.

How to Track and Adjust

The number is a starting point, not a verdict. Here is how to use it well:

Weigh yourself once a week, same time, same scale, after using the bathroom. Daily weigh-ins add noise from water, meals, and clothing; the weekly trend is what matters.

Give it 2–3 weeks before judging. If your weight is flat across that window, your maintenance estimate is right. If it is creeping up, you are eating above maintenance; if it is sliding down, you are eating below it.

Adjust in small steps. If the trend drifts, change your intake by about 100–200 calories a day — a snack, not a diet overhaul — and watch for another two weeks. Big swings cause hunger, frustration, and rebound; small ones stick.

Recheck after real changes. New job, new training plan, or a change of ten pounds or more: run the calculator again with your new numbers.

Be Honest About Activity

The activity level is where most people accidentally inflate their number. A “moderately active” week means real moderate exercise on three to five days — not a busy week at the office plus good intentions. When in doubt, pick the lower level: underestimating slightly is safer than overestimating, because an inflated maintenance figure quietly turns into weight gain. Count a typical week, not your best week ever.

Frequently Asked Questions

1. Are maintenance calories the same as TDEE?

Yes, for practical purposes. TDEE (total daily energy expenditure) is the technical name for the same number. This page frames it around staying at your current weight; our TDEE calculator frames the same result around loss and gain targets as well.

2. How accurate is the estimate?

Within roughly 10 percent for most adults — close enough to be useful, not precise enough to treat as gospel. Body composition, health conditions, and day-to-day variation all shift the real figure, which is why the weekly weighing habit matters more than the exact number.

3. What if my weight keeps rising even though I eat at maintenance?

First, check the activity level — it is the most common overestimate. Then check the small things: drinks, cooking oils, and weekend meals are the usual uncounted calories. If intake is genuinely at the estimate and weight still rises, talk to a doctor; thyroid and medication effects are real and worth ruling out.

4. Should I eat the same amount every day?

You do not have to. The weekly total is what counts, so a bigger Saturday balanced by a lighter Sunday works fine. Some people find that flexibility easier to live with than a rigid daily target.

5. How often should I recalculate?

Every few months, or after a real change: ten pounds gained or lost, a new job, a new training routine, or a big birthday. Otherwise the number stays useful as it is.

6. Can I use this to lose or gain weight?

Indirectly, yes — maintenance is the baseline. Eat a few hundred calories below it to lose, or above it to gain. For ready-made targets, use our TDEE calculator, which turns this number into daily loss and gain goals.

Try these calculators too: TDEE Calculator, BMI Calculator, Walking Calorie, Body Fat Calculator.

Disclaimer: This calculator is for general information only and is not medical advice. Calorie needs are estimates and vary with body composition, health conditions, and medication. Talk to a doctor or registered dietitian before starting a new diet or exercise program, especially if you have a health condition, are pregnant, or are under 20.