Most calorie calculators overstate what you burned. This one doesn't — and it runs the same model Chiron uses when it logs a real session.
Nearly every calorie calculator online multiplies your MET value by body weight and time, and reports the result as "calories burned." That figure is gross expenditure — it includes the calories your body would have burned anyway just being alive for that hour.
If you then subtract that number from a daily calorie target, you have counted your resting metabolism twice, because your daily target already assumed it. For an 80 kg person that's roughly 80 kcal of phantom credit per hour of training — enough to quietly erase a deficit over a week.
This calculator uses (MET − 1) instead, so what you see is the energy the workout actually added. It's the same convention Chiron enforces when it writes a session to your log, for exactly this reason.
The second number is the carbohydrate you drew down. The share of energy coming from carbohydrate rises with intensity, and resistance work and HIIT are more glycolytic than steady-state at the same nominal effort. It's why a hard session leaves you hungry in a way a long walk doesn't — and why what you eat afterwards matters more.
This gives you one number for one session. It doesn't know you trained legs this morning, that you're 40 g short on protein, or that your weight has been drifting down all week — so it can't tell you what to eat tonight. That's the part Chiron does.
Describe your session in a WhatsApp message and it's logged — with the same maths, against the rest of your day.
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Chiron is a wellness coach, not a medical provider. These calculators use population-level formulas and give you an estimate, not a diagnosis or a prescription. Talk to a doctor before making significant changes if you have a medical condition, are pregnant, or are managing an eating disorder.