Daily calorie burn = resting metabolism × activity factor + movement calories from METs + a small lift from digesting food.
You came here to learn how to calculate daily calorie burn in a clear, no-nonsense way. This guide shows the math, what each term means, and how to plug in your numbers. You will see the resting part, the movement part, and the food-processing part—then combine them into one Total Daily Energy Expenditure (TDEE) you can use.
RMR First, Then Add Movement
Your resting metabolic rate (RMR) is the base. It covers the energy your body spends to keep the lights on: brain, organs, breathing, and more. The most practical way to estimate RMR is with a peer-reviewed formula. The Mifflin–St Jeor paper is widely used in clinics and research. The revised Harris–Benedict equations are another option.
Common Equations For RMR
All of the rows below are estimates for healthy adults under standard conditions. If you have a medical condition or outlier body composition, look for measured values when possible.
| Method | Inputs | Core Formula (Metric) |
|---|---|---|
| Mifflin–St Jeor (Men) | Weight, height, age | RMR = 10×kg + 6.25×cm − 5×age + 5 |
| Mifflin–St Jeor (Women) | Weight, height, age | RMR = 10×kg + 6.25×cm − 5×age − 161 |
| Harris–Benedict (1984 Rev., Men) | Weight, height, age | RMR = 13.397×kg + 4.799×cm − 5.677×age + 88.362 |
| Harris–Benedict (1984 Rev., Women) | Weight, height, age | RMR = 9.247×kg + 3.098×cm − 4.330×age + 447.593 |
| Katch–McArdle | Lean mass | RMR = 370 + 21.6 × lean_mass_kg |
| Cunningham | Fat-free mass | RMR = 500 + 22 × FFM_kg |
| Owen (Women) | Weight | RMR = 795 + 7.18 × kg |
How To Calculate Daily Calorie Burn In Practice
The hands-on part. We’ll build your TDEE in three pieces. First, compute RMR with one equation above. Second, account for daily movement. Third, add the cost of digesting food, the thermic effect of food (TEF).
Step 1: Estimate Your RMR
Pick the equation that fits your data. If you know your body fat or lean mass from a DXA or BIA test, Katch–McArdle or Cunningham can help. If you only know height, weight, and age, Mifflin–St Jeor is a strong default with solid validation. Keep the units straight. Metric inputs keep mistakes away.
Step 2: Add Everyday Movement
Movement covers two buckets. One is structured exercise, like a run or lifting session. The other is NEAT—small actions like standing, walking to the bus, or climbing stairs. NEAT can swing daily burn by hundreds of calories in active people. You can estimate both with MET values from the Compendium of Physical Activities. One MET equals sitting-at-rest energy cost. Calories for an activity ≈ MET × body_weight_kg × hours.
MET Math, With A Mini Example
Say you weigh 70 kg and take a 45-minute brisk walk at 4.3 METs. Calories ≈ 4.3 × 70 × 0.75 ≈ 226. Add that to the day. Repeat for other activities you log.
Step 3: Add The Thermic Effect Of Food
Digesting food costs energy. Mixed diets land near one-tenth of intake for TEF. You can approximate TEF as 10% of daily calories. Protein has a higher TEF than fat, with carbs in the middle.
Put It Together: Your TDEE
TDEE is the grand total. A practical formula looks like this:
TDEE ≈ RMR + Exercise Calories + NEAT Calories + TEF.
Another quick method is to multiply RMR by an activity factor that lumps movement and TEF together. This is faster but hides detail, so the MET route helps when you want to audit your day.
Common Activity Factors (Quick Method)
These ranges are ballparks from exercise and nutrition texts. If your job or training plan differs, adjust up or down based on weekly logs.
- Sedentary (desk work, little walking): RMR × 1.2
- Lightly active (one or two short sessions/week): RMR × 1.35
- Moderately active (3–5 sessions/week): RMR × 1.5
- Very active (daily training or physical job): RMR × 1.7
- Extra active (twice-a-day training, heavy labor): RMR × 1.9
Worked Example Using Real Numbers
Meet Alex, 30, 175 cm, 75 kg. We’ll use Mifflin–St Jeor. RMR = 10×75 + 6.25×175 − 5×30 + 5 = 1670 kcal/day. Alex lifts for 45 minutes (6 METs) and logs 9,000 steps at a casual pace (3 METs for 1.3 hours total walking time). Exercise calories ≈ 6 × 75 × 0.75 = 338. NEAT walking ≈ 3 × 75 × 1.3 = 293. Base subtotal: 1670 + 338 + 293 = 2301.
Now estimate TEF. If Alex eats 2300 kcal, TEF ≈ 230 kcal. That lifts the day to ~2530 kcal. Round to the nearest hundred for planning and adjust with a two-week weight trend.
Why RMR Estimates Differ
Different formulas were built on different study groups. Mifflin–St Jeor tracks measured values in many weight-stable adults. Harris–Benedict dates back further and can overshoot in some cases. Equations based on fat-free mass can tighten the estimate if you have a quality body-comp measure. The goal is to start with a sound estimate, then refine with your own data.
Keyword Variant: Calculating Daily Calorie Burn For Your Routine
This section shows how to plot the math into a week. Keep RMR steady, log activity with METs, then let intake move up or down based on goals. The phrase how to calculate daily calorie burn fits here because we’re applying the same steps across different days. Stay consistent.
Build A Weekly Template
- Compute RMR once with your chosen equation.
- List your recurring activities with METs and typical durations.
- Estimate weekday NEAT from step counts or a pedometer average.
- Add planned training sessions and their METs.
- Sum daily movement calories for each day.
- Add TEF as 10% of total daily calories or let it float while you track intake.
- Review scale and tape data each week and nudge calories by 100–200 if the trend misses your target.
Second Table: Sample Day-By-Day Movement Plan
This example uses a 70 kg person. Swap your own weight to scale the last column.
| Activity | METs | Calories/hour (70 kg) |
|---|---|---|
| Easy walking | 3.0 | 210 |
| Brisk walking | 4.3 | 301 |
| Light cycling | 5.5 | 385 |
| Jogging | 7.0 | 490 |
| Strength training | 6.0 | 420 |
| Housework | 3.5 | 245 |
| Stairs (up) | 8.8 | 616 |
| Yard work | 4.0 | 280 |
| Yoga | 3.0 | 210 |
| Basketball (game) | 8.0 | 560 |
Common Pitfalls To Avoid
- Copying a random activity factor. Two people with the same job can have different NEAT. Build your own factor from logs.
- Forgetting TEF. It’s small but real, and it changes with intake and protein share.
- Using pounds in a metric equation. Double-check units. If something looks off by a factor of 2.2, it probably is.
- Chasing exactness on day one. Start with a solid estimate, then tune based on your trend line.
What To Do With Your Number
Maintenance sits near your TDEE. For fat loss, a modest 300–500 kcal gap is a steady start for many adults. For muscle gain with training, add 150–300 kcal and keep protein consistent. Re-check the moving parts each week: steps, sessions, sleep, appetite, and stress. If the scale trend stalls for two weeks, adjust calories or movement by a small step and watch again.
Quick Reference: Equation Or METs?
Use the one that fits your goal and patience level.
- Need speed? RMR × activity factor gives you a fast daily target.
- Need control? RMR + detailed MET logs shows where calories come from and where to tweak.
- Training for performance? Keep a weekly energy balance sheet so hard days get enough fuel.
Review averages and log intake regularly.