Calories Burned Inputs
Estimate burn using MET, duration, body weight, and incline.
Result
MET-based estimate with optional incline multiplier.
Supporting metrics
The headline value alongside the engine's top supporting outputs.
How to use it
- Select your activity type and enter duration and body weight. Calorie burn scales with body weight — a 200 lb person burns approximately 30% more than a 150 lb person doing the same workout at the same intensity.
- Calorie burn estimates are MET-based with ±15–25% individual variation. Actual burn depends on fitness level, intensity, terrain, and body composition — treat outputs as educated estimates, not precise measurements.
- Do not use activity burn estimates to justify eating those exact calories back on a 1-for-1 basis. Your TDEE already accounts for baseline movement, and overestimating compensatory intake is a common fat-loss stall cause.
- Cardio burns less than most people intuitively expect: 40 minutes of moderate running at 160 lbs burns roughly 400 calories — less than a fast-food meal. Nutrition is the primary fat-loss lever; cardio is a meaningful supplement.
- Track weekly exercise calorie totals rather than single sessions. Consistent cardio adds 1,500–2,500 calories per week for most people — meaningful for body composition over months, but not transformative without dietary control.
Questions people usually ask
Why is calorie burn only an estimate?
Because calorie burn depends on body size, efficiency, effort, terrain, and movement style. Any calculator is giving you a useful range, not a lab reading.
Why do wearables and calculators disagree?
They use different models and different signals. The useful move is to look for a consistent range instead of chasing a single exact number.
Should I eat back every calorie this shows?
Usually not. Most people do better treating exercise calories cautiously, then adjusting from bodyweight and recovery data over time.
What makes the estimate more useful?
Using realistic duration and effort, then comparing multiple sessions so you understand relative output instead of obsessing over one workout.
Is this tool free and private to use?
Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Do these tools replace medical guidance?
No. These outputs are general fitness estimates — not medical advice.
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