How to Calculate TDEE and Daily Calories
Short answer
TDEE (total daily energy expenditure) β BMR Γ activity factor. Eat near TDEE to maintain weight; a modest deficit of 300β500 kcal/day is a common fat-loss starting point.
TDEE estimates how many calories you burn in a day. It is a planning number, not a lab measurement. Generate one with the calorie calculator (TDEE).
From BMR to TDEE
BMR is calories at complete rest. Multiply by an activity factor (sedentary β 1.2, very active β 1.725) to get TDEE.
Example
If BMR is 1,600 and you are moderately active (Γ1.55), TDEE β 2,480 kcal. A 400 kcal deficit targets about 2,080 kcal/day.
Pair with BMI and water
BMI is only a size screen β see how to calculate BMI. Hydration still matters: water intake calculator and how much water to drink.
Adjust in the real world
Track weight for 2β3 weeks. If it stalls, tweak intake by another 100β200 kcal. Medical conditions need clinician advice.
Open the free bmi calculator to check your result.
See also: how many calories to lose weight.
See also: a levels exam guide.
More worked numbers
Change one input at a time so you build intuition. Write the formula, substitute values, then confirm with the free calorie calculator. If the tool disagrees with your hand math, check units first (months vs years, percent vs decimal, inclusive ranges).
Common mistakes to avoid
- Mixing up percent and decimal forms (15% is 0.15, not 15).
- Using the wrong base when calculating a change or a reverse percentage.
- Ignoring fees, tax or daylight saving when the real-world total depends on them.
- Rounding too early in multi-step arithmetic.
How to practise
Invent three mini-problems from your own life β a bill, a grade, a trip, a loan quote β and solve them on paper before you open the calculator. Teaching the steps to someone else is one of the fastest ways to lock in the method.
Related tools on ViralScopeHub
After you finish this guide, explore the linked tools above and the related articles for neighbouring skills. Our calculators run privately in your browser with no sign-up, so you can check homework, budgets or work estimates without uploading data.
Quick reference card
Keep the short answer box at the top of this page as your cheat sheet. When a search result brought you here for a specific phrase, that box is designed to match the query with the formula first, then the examples below fill in the judgement calls.
Frequently asked questions
What does TDEE mean?
Total daily energy expenditure β estimated calories burned per day. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
Is TDEE the same as BMR?
No. BMR is rest only; TDEE includes activity. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
How big a deficit is safe?
Many adults start around 300β500 kcal below TDEE; ask a professional if unsure. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
Which formula do you use?
Our calorie calculator documents its method on the tool page (Mifflin-St Jeor style estimates). Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.