Choosing an activity factor: count the whole day, not one workout
An activity multiplier can move a maintenance estimate substantially. Consider work, commuting and routine movement as well as planned exercise.
Calorie calculator →See how much the assumption changes
A resting estimate of 1600 kcal per day becomes 1920 with a multiplier of 1.2 and 2480 with a multiplier of 1.55. The difference is 560 kcal per day. The calculator has not measured that extra expenditure; you supplied a different assumption. One unusually active afternoon does not establish a person’s usual activity level.
Avoid counting exercise twice
An activity multiplier already attempts to represent movement across the day. Selecting a high multiplier and then adding every calorie reported by a watch may count some activity twice. Two people with the same number of weekly workouts may also have different needs if one sits throughout the working day and the other has a physically demanding occupation. A single label cannot capture all those details.
Treat the output as a starting estimate
Record the factor and the routine it represents so later comparisons are meaningful. This calculator estimates maintenance energy; it does not automatically create a weight-loss prescription. Adult assumptions should not replace individualized advice for children, pregnancy, breastfeeding or relevant medical conditions. Once a suitable energy total has been established, the macro calculator can show its nutrient allocation. It cannot resolve uncertainty in the original activity estimate.
Try the calculators
- Calorie calculator
Estimate maintenance energy for your activity level.
- BMR calculator
Estimate resting energy with Mifflin–St Jeor.
- Macro calculator
Convert daily calories into carbohydrate, protein and fat grams.