Estimate your basal metabolic rate and the daily calories that maintain, lose or gain weight at your activity level.
Every calorie calculator asks you to pick an activity level, and that single choice can swing your result by 500 kcal or more. Most people pick one level too high. Here’s how the levels work and how to choose accurately.
The standard activity multipliers
Your BMR (calories at rest) is multiplied by one of these factors to estimate daily needs:
| Level | Multiplier | Typical description |
|---|---|---|
| Sedentary | 1.2 | Desk job, little or no exercise |
| Lightly active | 1.375 | Light exercise 1–3 days/week |
| Moderately active | 1.55 | Moderate exercise 3–5 days/week |
| Very active | 1.725 | Hard exercise 6–7 days/week |
| Extra active | 1.9 | Physical job plus hard training, or twice-daily training |
For someone with a BMR of 1,600 kcal, those levels range from 1,920 to 3,040 kcal, a gap of more than 1,100 kcal.
Why people overestimate
- Exercise feels bigger than it is. An hour at the gym might burn 300–500 kcal, but the other 23 hours matter more.
- Exercise days ≠ every day. “Moderately active” assumes a consistent weekly pattern, not your best week.
- The labels describe the whole day. A desk worker who trains hard for 45 minutes, five days a week, is often closer to lightly or moderately active than very active.
Use your daily steps as a guide
Steps capture everyday movement (NEAT), which varies far more between people than workouts do. As a rough guide:
| Average daily steps | Suggested level (without much extra exercise) |
|---|---|
| Under 5,000 | Sedentary |
| 5,000 – 7,500 | Lightly active |
| 7,500 – 10,000 | Moderately active |
| 10,000 – 12,500 | Very active |
| Over 12,500 | Very to extra active |
If you also do regular structured exercise, move up one level, not two.
Examples
- Office worker, 4,000 steps, gym twice a week → Lightly active (1.375)
- Teacher on their feet, 9,000 steps, no gym → Moderately active (1.55)
- Nurse on 12-hour shifts, 14,000 steps, runs three times a week → Very active (1.725)
- Construction worker who also trains → Extra active (1.9)
When in doubt, go lower
If you’re between two levels, pick the lower one. If you lose weight faster than expected, simply eat a little more. That’s far better than eating too much and wondering why nothing changes.
Calibrate with real data
Activity multipliers are estimates. The most accurate way to find your true maintenance is:
- Choose a level in the calorie calculator.
- Eat at that maintenance figure consistently for 2–3 weeks.
- Track your 7-day average weight.
- Stable → your level is right.
- Falling → your true TDEE is higher. Move up or add calories.
- Rising → your true TDEE is lower. Move down or reduce calories.
Every 0.5 kg per week of unexpected change corresponds to roughly 550 kcal/day of difference.
Activity changes over time
Recalculate when your routine changes: a new job, an injury, a training block or a holiday. And remember that as you lose weight, TDEE falls even at the same activity level; see How Many Calories Should I Eat to Lose Weight? A Realistic Guide.
New to these terms? BMR vs TDEE: What's the Difference and Which Should You Eat? explains how BMR and TDEE fit together.
Estimate your basal metabolic rate and the daily calories that maintain, lose or gain weight at your activity level.