Calculator
Enter ActiGraph counts, duration, body weight, and model settings. The result appears above this form after submission.
Example Data Table
These sample rows show how different count levels, weight values, and durations can change the calorie result.
| Activity | CPM | Minutes | Weight kg | Method | Intensity | Estimated Output |
|---|---|---|---|---|---|---|
| Walking | 2100 | 30 | 70 | Freedson | Moderate | About 187 kcal |
| Desk Work | 60 | 45 | 70 | Freedson | Sedentary | About 81 kcal |
| Jogging | 6500 | 25 | 75 | Freedson | Vigorous | About 303 kcal |
| Custom Study Trial | 3200 | 20 | 68 | Custom Linear | Moderate | Depends on slope |
Formula Used
Counts Per Minute
CPM = total counts ÷ duration in minutes
Freedson Adult Linear Model
MET = 1.439008 + 0.000795 × CPM
Custom Linear Model
MET = intercept + slope × CPM
Kilocalories From MET
kcal = MET × 3.5 × body weight kg ÷ 200 × minutes
Active Kilocalories
active kcal = gross kcal - resting kcal
The final value can be adjusted by the calibration factor. A factor of 100% leaves the calculated value unchanged.
How to Use This Calculator
- Enter the activity name for your report.
- Add counts per minute or total ActiGraph counts.
- Choose manual duration or epoch-based duration.
- Enter body weight and select the correct unit.
- Select a model, custom equation, or manual MET input.
- Choose gross calories or active calories only.
- Press the calculate button to view results above the form.
- Use the CSV or PDF button to save your report.
Understanding ActiGraph Calorie Estimates
ActiGraph data is useful when movement needs a clear number. The device records body motion as activity counts. Those counts can be converted into counts per minute. A calorie estimate can then be made from weight, time, and a selected metabolic model. This calculator helps you compare those steps in one place.
The main input is counts per minute. Higher counts usually mean faster movement or stronger acceleration. Duration controls how long the effort lasted. Weight matters because a heavier body uses more energy for the same metabolic level. The calculator also lets you enter total counts and divide them by minutes automatically.
Many research workflows report gross calories. Gross calories include resting energy. Some users need active calories only. Active calories subtract a resting baseline from the movement estimate. Both views are helpful. Gross values describe total energy during the worn period. Active values focus on the extra cost of movement.
The selected model changes the result. A linear counts model estimates METs from counts per minute. METs are then converted to kilocalories with the standard oxygen cost equation. Custom slope and intercept fields are included for studies using a specific calibration. Manual MET mode is also available when a lab, coach, or paper already provides a MET value.
Use clean data for better results. Remove non-wear time before entry. Match the count axis with the model you choose. Do not mix vector magnitude counts with a vertical-axis equation unless your protocol allows it. Short epochs can be useful for children or stop-start activity, but they should be summarized consistently.
This calculator is an estimator, not a clinical measurement tool. ActiGraph counts depend on device placement, sampling setup, filtering, and the activity type. Cycling, lifting, carrying loads, and upper-body work may be underestimated by hip-worn monitors. For formal research, use the equation required by your protocol and report every assumption.
For personal fitness, treat the answer as a planning guide. Compare sessions with the same settings. Watch trends more than single readings. Save exported files with notes about placement, epoch length, and formula choice. That context makes future comparisons clearer and reduces reporting errors for every tracked activity safely.
FAQs
What does this ActiGraph kcal calculator estimate?
It estimates calories burned from activity counts, duration, body weight, and a selected metabolic formula. It can show gross calories, active calories, METs, counts per minute, and intensity.
What are counts per minute?
Counts per minute summarize recorded movement over time. The calculator uses this value to estimate MET level. If you enter total counts, it divides them by the calculated minutes.
Should I use gross kcal or active kcal?
Use gross kcal when you want total energy during the recorded period. Use active kcal when you want the extra movement cost after subtracting a resting baseline.
What is the calibration factor?
The calibration factor adjusts the final result by a percentage. Use 100 for no change. Use another value only when your study or device protocol requires adjustment.
Can I use total counts instead of CPM?
Yes. Choose total counts as the count type. Then enter the duration manually or through epoch settings. The tool calculates CPM before estimating calories.
Why does body weight affect kcal burned?
The kcal formula uses body mass because moving a heavier body generally requires more energy at the same MET level and duration.
Is this suitable for research reporting?
It can support calculations and checks, but formal research should follow the required protocol. Report the model, epoch length, axis, wear location, and cleaning rules.
Why may some activities be underestimated?
Hip-worn movement monitors may miss cycling, lifting, carrying, and upper-body work. These activities can have high energy cost but lower hip acceleration.