Estimate calories burned eating from your body weight, meal time and whether you sit or stand, using typical MET values; resting energy is included.
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Calories Burned Eating Formula
Choose Estimate from body weight to use an eating activity, body weight and duration. The calculator converts pounds to kilograms and hours to minutes; changing units converts the existing quantity. The oxygen-based formula is:
Variables:
- C = estimated gross whole-body energy in kcal
- BW = body weight in kilograms
- M = time spent eating in minutes
- MET = the selected eating activity value
The 2024 Adult Compendium Self Care table supplies these eating activities. The reference population is adults aged 19–59; the values are population estimates, not personal measurements:
- 1.5 MET for eating while sitting (code 13030)
- 2 MET for talking and eating or eating only while standing (code 13035)
Choose Use a known energy rate to multiply a supplied whole-body kcal-per-minute rate by duration. This mode does not use body weight or eating posture:
R is the supplied whole-body energy rate in kcal/min. It is assumed constant over the entered duration. Its source and whether it represents gross energy are not verified by the calculator.
Calories Burned While Eating by Body Weight
Approximate gross whole-body energy during 30 minutes of eating, rounded to whole kcal. Pounds convert using 0.45359237 kg/lb; actual energy varies with the person and activity:
| Body Weight | Sitting and Eating (1.5 MET) | Standing and Eating (2 MET) |
|---|---|---|
| 120 lb | 43 kcal | 57 kcal |
| 150 lb | 54 kcal | 71 kcal |
| 180 lb | 64 kcal | 86 kcal |
| 210 lb | 75 kcal | 100 kcal |
How to Calculate Calories Burned Eating
- Choose Estimate from body weight and enter your body weight, or choose Use a known energy rate and enter a measured or documented whole-body rate in kcal/min.
- Enter the time spent eating in minutes or hours.
- For the body-weight estimate, choose eating while sitting (1.5 MET) or eating while standing, with or without talking (2 MET). Weight and posture are not used in known-rate mode.
- Select Calculate to see total energy and the energy rate. Totals use unrounded values; displayed values are rounded.
Example
For 150 lb (68.0388555 kg) and 30 minutes of eating while sitting at 1.5 MET, the gross estimate is:
The gross whole-body estimate during that 30-minute period is about 53.58 kcal. It includes resting energy and does not isolate the energy used to chew or digest a meal.
Eating Style Guide
- Sitting and eating: the documented category uses 1.5 MET for eating while seated.
- Standing and eating: the documented 2-MET category covers talking and eating or eating only while standing.
