TDEE Calculator

A lot of people mix these two up, and it’s easy to see why. Your Basal Metabolic Rate (BMR)? That's the bare minimum energy your body needs just to exist—think resting, lying in bed all day, keeping all the vital systems running. That’s the baseline.

TDEE, though, takes that BMR number and multiplies it based on how much you actually *do*. It bundles the BMR energy, the energy for digestion, plus all the movement and exercise. So, BMR is the engine size; TDEE is the actual horsepower you put down on the road that day.

This is the multiplier part that scales your BMR up to reflect your actual life. Don't just pick the option that makes you sound fitter; pick the one that’s true for what you do most of the time. If you sit at a desk but take a casual 30-minute walk a few times a week, you probably aren't 'Moderately Active.' Just be real with yourself, or this whole TDEE number will end up too high.

When you finally hit calculate, you get one main number, usually calories per day. That figure is essentially what you need to eat daily just to stay exactly the same weight, based on the info you provided. Eat that number every day, and barring weird external factors, your weight should hold steady.

Don't treat it like gospel, though. It’s a strategic guidepost. We use this maintenance number to figure out how much we need to cut (for loss) or add (for gain).

The PAL multiplier is what bridges the gap between just existing and actually living actively. For example, someone completely sedentary might have a PAL of 1.2, meaning they burn maybe 20% more than their BMR. On the flip side, someone training seriously might hit 1.7 or higher, meaning their daily burn is nearly 70% above that baseline. Getting this multiplier dialed in is honestly the key to getting a reliable TDEE number.

Right now, the Mifflin-St Jeor equation is generally considered the gold standard, the most accepted predictor for BMR across a lot of body types, even for people who are obese. It’s pretty straightforward, using just your weight, height, age, and sex. We usually lean on this one for modern TDEE calculations because, compared to the older methods, it’s less likely to wildly overestimate your BMR.

Even though we default to Mifflin-St Jeor in this calculator, you have to remember: any formula is just an educated guess. Your real metabolic rate shifts based on your genetics, how much muscle you carry versus fat, and even your hormones. The most accurate TDEE? That’s the one you figure out by tracking what actually happens to your weight over a few weeks of consistent eating.

If your job keeps you glued to a chair and you barely get any structured exercise—minimal walking, no gym time—this is you. Your PAL multiplier will be the lowest here because you aren't demanding much extra energy output.

You fall into this bracket if you manage light activity or sports just one to three times a week. Maybe you’re walking the dog briskly or lifting weights casually twice a week. It just accounts for a little bit more energy usage than being totally sedentary.

Pick this one if you are hitting the gym or playing sports at a moderate intensity four or five times every single week. This usually fits people who are fairly dedicated to fitness but still work a standard, non-manual job.

If you are putting in intense work—running hard, heavy lifting—six or seven days a week, or if your job is physically demanding all day long, this is your category. Your body is constantly running on high fuel.

This is for the real extremes. Think professional athletes deep into training cycles, or folks whose jobs are inherently physical, like construction workers, servers who are on their feet constantly, or farmers. You're burning huge amounts of calories just through work, plus training.

To shed weight, you absolutely need a calorie deficit. That means you must consistently eat fewer calories than your TDEE suggests. A safe, sustainable starting point is usually aiming for 500 calories less than your TDEE daily. This generally translates to losing about one pound of fat per week (since one pound is roughly 3,500 calories).

Heads up: Don't drop your intake below your BMR for long periods. That's tough on your body and can mess with your metabolism down the road.

Gaining weight, especially if you're trying to build quality muscle, means you need a calorie surplus. You have to eat more than your TDEE allows. A modest surplus, maybe 250 to 500 calories above that TDEE figure, is often suggested for gaining lean mass while keeping fat gain in check. If you overshoot that, be prepared—a lot of the extra weight will likely be fat, not muscle.

If the goal is just maintenance—staying exactly the same—then yeah, you should be aiming to eat calories equal to your calculated TDEE. This takes consistency, though. If you eat perfectly one day and then feast the next, you'll see little wobbles, but over the long haul, eating right at that TDEE number should keep you stable.