Choose one target
Use maintenance, a small deficit, or a small surplus. Do not change workouts, steps, meals, and calories all at once.
Direct answer: your TDEE is an estimated maintenance-calorie number. Use it to pick a starting target, then review two to three weeks of bodyweight trend, hunger, training performance, and adherence before changing calories. The estimate starts the plan; your real week calibrates it.
This page is for general fitness planning, not medical nutrition therapy. If you are under 18, pregnant, managing a medical condition, recovering from disordered eating, or dealing with pain, dizziness, or unusual fatigue, work with a qualified professional instead of using a web calculator as the decision-maker.
Free TDEE calculator
Uses the Mifflin-St Jeor resting-energy equation, then multiplies by an activity factor. All math runs in your browser.
This is a limitation of the formula, not a full picture of your body.
Kilograms
Centimeters
Pounds
BMR estimate-Calories at rest from the formula.
TDEE estimate-Estimated maintenance calories.
First target-Pick a repeatable first step.
The TDEE Reality Check
A good calculator gives you a starting line. A good coach helps you decide what the number means after your real week pushes back.
Track the week
Watch weekly bodyweight average, hunger, training performance, energy, sleep, and meal-plan adherence.
Move calmly
If the trend and lived experience disagree with the target, adjust by a modest amount and review again.
| What happened after 2-3 weeks? | Likely interpretation | Next move |
|---|---|---|
| Weight trend, hunger, and training all look steady. | The estimate may be close enough for the current goal. | Keep the target and focus on meal consistency. |
| Weight is not moving, but adherence is inconsistent. | The calorie number may not be the main blocker. | Fix grocery planning, meal timing, food logging, or weekend drift before cutting more. |
| Training performance and energy drop hard. | The deficit may be too aggressive, or recovery may be underbuilt. | Use a smaller deficit, add a maintenance phase, or get qualified help when symptoms are concerning. |
| The plan works on rest days but breaks after hard workouts. | Your weekly average may need training-day context, not one identical day. | Plan workout-day meals separately from rest-day meals. |
IZEM angle: the useful product question is not only "what is my TDEE?" It is "how do workouts, meals, hunger, food scans, day reviews, and schedule changes affect next week?" IZEM is built as a premium AI personal trainer and accountability coach that connects those pieces instead of leaving the math in a separate tab.
How to choose the activity level
Most bad TDEE outputs start with the activity dropdown. Pick the level that describes your usual week, not your best week. If your schedule swings between office days, heavy training days, and missed sessions, use the lower honest category first. It is easier to adjust upward after evidence than to start with an optimistic target you cannot repeat.
Wearables, cardio machines, and calculators can all be useful, but none of them remove the need for review. If the number looks precise but your weekly result is chaotic, the answer is not more decimal places. The answer is a calmer feedback loop.
From TDEE to meals
Once you have a calorie target, use the macro calculator to split it into protein, carbohydrates, and fats. Then test whether the meals fit the week you actually live. A perfect number with no grocery plan is still a fragile plan.
Frequently asked questions
What is TDEE?
TDEE means total daily energy expenditure. It is an estimate of how many calories you burn across a full day, including resting metabolism, normal movement, exercise, and digestion.
Is a TDEE calculator exact?
No. It is a starting estimate. The useful next step is to follow the target consistently for two to three weeks, compare bodyweight trend, hunger, training performance, and adherence, then make a modest adjustment.
Should I eat the same calories on workout and rest days?
Some people do well with one steady daily target. Others do better with similar weekly calories but slightly different meals on training days and rest days. The best answer is the one you can repeat while training well and feeling stable.
Sources and method notes
- The calculator uses the Mifflin-St Jeor resting-energy equation described in the original 1990 paper indexed by PubMed.
- The weekly adjustment advice is intentionally conservative because static calorie rules can overstate predictable weight change. The NIDDK Body Weight Planner research page explains why dynamic models are used for more precise planning.
- For general weight management, the CDC emphasizes gradual, sustainable change rather than extreme targets.
Want the number connected to the week?
IZEM can pair workouts, practical meal plans, food scanning, day reviews, coach memory, and proactive calls so your plan adapts instead of leaving you to rebuild it alone.
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