Active vs. total calories: what are you actually comparing?

Start with the question behind the number

A calorie estimate can describe all the energy used during an activity, or only the energy above a resting baseline. Total, also called gross, calories answer the first question. Active, also called net, calories answer the second. Comparing one with the other makes an ordinary difference look like a calculation error.

StrideCalc uses the same one-MET resting allowance throughout its movement tools. That keeps its own estimates consistent, but another device can use a different resting model.

A worked walking example

Take the default example: 170 lb, 30 minutes and a moderate 3 mph walk. The model returns about 154 total kcal. Roughly 40 kcal represent the standard resting allowance over those 30 minutes, leaving about 113 active kcal. Because each number is rounded separately, the displayed components can differ from the rounded total by one calorie.

The resting allowance is not a claim that you personally would have burned exactly that amount sitting still. It is a bookkeeping convention that lets the calculation separate a baseline from the additional activity.

Compare like with like

Before comparing a watch, treadmill display and calculator, write down what each number represents. A small checklist is more useful than deciding that the largest or smallest estimate must be correct.

• Match the activity duration, excluding long pauses.
• Check whether each result says active, net, total or gross.
• Check the body weight and units used by the device.
• Keep in mind that different models can remain different after these checks.

Avoid counting the same energy twice

A daily maintenance estimate already includes a resting component and an activity assumption. Adding the gross calories of every walk to that estimate can duplicate resting energy and may duplicate activity as well. Decide which model describes your day before combining numbers.

Use these outputs to understand the assumptions and compare similar sessions. They are not precise measurements of food that must be added or removed.