TDEE: 5 Mistakes to Avoid
Estimates total daily energy expenditure. The maths is not complicated, but a handful of errors come up again and again in this and related health & fitness calculations. Here is what to watch for.
Simple measurements such as weight, height and waist circumference are widely used to screen for health risks because they are cheap and easy to repeat. They are not diagnoses, but tracked over time they show whether lifestyle changes are working.
Energy needs depend on age, sex, size and activity. Formulas such as Mifflin-St Jeor estimate resting needs, and an activity multiplier turns that into daily needs. Real requirements vary by a few hundred calories, so adjust based on how your weight changes over several weeks.
1. Relying on a single measurement
Weight and heart rate fluctuate daily; trends tell you more.
2. Mixing units
Entering pounds or inches into a metric formula gives nonsense results.
3. Cutting calories too aggressively
Very large deficits are hard to sustain and can lead to muscle loss.
4. Treating estimates as exact
Formulas such as BMR or body fat are population estimates with real margins of error.
5. Measuring inconsistently
Tape measurements change with posture and breathing; measure the same way each time.
The correct method
TDEE = BMR × activity factor.
For example, with these inputs:
- Sex: Male
- Weight (kg): 65
- Height (cm): 168
- Age: 35
- Activity level: Light (1–3 days/week)
the calculator returns:
- Daily calories to maintain weight: 2,104 kcal
Related calculations
- Calories Burned Calculator: Estimates calories burned with MET values.
- BMI Calculator (Asian Cut-offs): Singapore's Health Promotion Board uses lower BMI cut-offs for Asians because health risks rise at lower BMIs.
- BMI Calculator (WHO): Calculates BMI with the international WHO categories.
- BMR Calculator: Estimates calories your body burns at rest.
The TDEE Calculator applies the formula consistently, so it is a quick way to double-check your own working.
Run your own numbers: TDEE Calculator