Active energy

An estimate of the energy you burned by moving today, on top of what your body uses at rest. It fills your Move ring.

Apple Watch estimates active energy using heart rate, movement and the Health details you've entered, such as age and height. It leaves out resting energy, the amount your body uses just keeping itself running.

It's much less exact than heart rate or steps. A 2025 review of 56 studies found Apple Watch energy estimates missed a common 10% accuracy bar in every group of studies it looked at, while heart rate and steps held up much better.

So use it to compare your own days and weeks, not as a precise count. An outdoor walk or run of about 20 minutes with good GPS helps Apple Watch calibrate, which improves its energy, distance and pace estimates.

Pajdo uses it to see how active a day was, nothing more.

This is general wellness information, not medical advice. If a number worries you, or stays away from your usual for a while, talk to a doctor.

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