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Dynamic Calories
Updated March 16, 2026
This content is for informational purposes only and is not a substitute for professional advice.
Dynamic Calories lets your daily calorie target move with your actual activity so high-burn days get more fuel and rest days stay leaner, without manual adjustment.
How it works
When Dynamic Calories is enabled, Fuel recalculates your daily calorie target as Apple Watch reports activity through the day. Instead of a fixed number set once in your plan, the target reflects what you are actually burning today.
This keeps your plan direction intact — if your goal is a deficit, you stay in a deficit — but the size of the target adapts to the day.
How activity affects the target
When Dynamic Calories is enabled, your daily target already accounts for activity because it is based on your actual burn (basal plus active energy). On high-activity days the target rises automatically; on rest days it stays lower. There is no separate toggle for workout calories — the dynamic baseline includes them.
When Dynamic Calories is off (Plan Calories mode), your target is a fixed number set in your plan. Workouts are visible in your energy balance but do not change the target. This is useful if you prefer a static number and treat workouts as bonus expenditure.
Calorie rollover
Dynamic Calories supports rolling over up to 200 kcal to the next day. If you finish the day under target, the unused portion (up to 200 kcal) carries forward.
Rollover prevents small daily shortfalls from accumulating into under-fueling patterns. It also gives you flexibility to shift calories toward days when you need them more.
When to enable Dynamic Calories
Enable Dynamic Calories if your activity varies significantly between days — for example, training days versus rest days — and you want the target to adapt automatically.
Keep it disabled if you prefer a fixed daily target or if your activity level is consistent enough that a static plan works well.
How it interacts with your plan
Dynamic Calories does not change your overall plan direction or weekly calorie budget. It redistributes daily targets within the plan so each day fits your actual energy expenditure.
Your Energy Balance view reflects the dynamic target, and Daily Review and Weekly Review grade you against the adjusted target rather than a static one.
Enabling Dynamic Calories
- Open You
- Open Coach Context (or Preferences)
- Under Daily Goal, switch from Plan Calories to Dynamic Calories
- Optionally enable calorie rollover in the same section