TDEE Calculator

TDEE Calculator delivers exactly what its name promises, calculate total daily energy expenditure by activity level, fast and free. Because it belongs to ToolsMonk's medical tools collection, the whole workflow happens on a single page instead of being spread across separate apps or websites.

Typical jobs it handles include finding your daily calorie needs to maintain, lose, or gain weight, setting a calorie deficit or surplus from a reliable baseline, and planning nutrition around your real activity level. The same page works on desktop, tablet, and mobile, so it is equally quick for a single urgent task and for work you repeat every week.

It is built for getting a real result on the first visit: no learning curve, no account, and the wider ToolsMonk toolbox close at hand.

TDEE Calculator estimates your Total Daily Energy Expenditure, all the calories you burn in a day, resting metabolism plus activity, by combining your BMR with an activity-level multiplier. It's the cornerstone number for any weight goal.

The logic is simple and powerful: eat below your TDEE to lose weight, at it to maintain, above it to gain. A daily deficit of around 500 calories targets roughly half a kilo (a pound) of loss per week, a sustainable pace. The TDEE itself is your maintenance level, and the deficit or surplus you choose sets how fast you move.

The biggest source of error is the activity multiplier. Most people overestimate how active they are, inflating their TDEE and then wondering why weight loss stalls, so it's wise to choose conservatively. Underestimating food intake (portions and small extras) compounds the problem.

Because it's an estimate, treat the number as a starting point: track real results over 2–3 weeks and adjust, and recalculate as your weight changes since TDEE falls as you lose. It's informational, not medical advice, and your details never leave your browser. Pair it with the BMR, Macro, and Calorie calculators for a full plan.