Refeed Day Calculator
Plan your refeed day without second guessing the numbers
A refeed day only works when the calories actually match what your body needs, not a guess pulled from a generic chart. This calculator takes your stats and your current deficit, works out your maintenance level, and shows exactly what a well planned refeed day looks like, along with how it fits into your broader weekly average.
Enter your stats to see today's target
Step 1 · Your numbers
Enter your stats and current diet setup
These details let the calculator estimate your maintenance calories first, since a refeed day only makes sense relative to that baseline.
Used because the standard BMR formula applies a different constant for each.
This multiplier converts your resting metabolic rate into a total daily estimate, based on standard activity factor tables used across sports nutrition.
How far below maintenance your regular diet days sit, as a percentage. A common range for a gradual fat loss phase is 15 to 25 percent.
Most refeed days simply return to maintenance calories for one day. Some people prefer a small surplus, though that shifts the day from a refeed toward a planned higher calorie day.
Pick the actual date of your next planned refeed day.
Step 2 · Your targets
Suggested refeed day macros
Step 3 · The weekly rhythm
Your calorie pattern across the full cycle
This chart shows every day in your refeed cycle, so you can see the refeed day for what it actually is, one planned day inside a longer, steadier pattern.
Worth comparing
How refeed frequency changes your weekly average
More frequent refeeds raise your average weekly intake, less frequent ones lower it. Neither is automatically correct, it depends on how your body and adherence respond, but seeing the actual numbers side by side makes the trade off much clearer.
| Refeed frequency | Weekly average calories | Percent of days at refeed level |
|---|
How this works
The formulas and reasoning behind your numbers
Nothing here is a black box. Resting metabolic rate is estimated using the Mifflin St Jeor equation, widely regarded as one of the more accurate predictive formulas in sports nutrition research, then multiplied by an activity factor to estimate total daily energy expenditure. All measurements follow standard SI units for the metric option, with imperial conversions handled automatically.
Why a refeed day exists at all
Extended calorie deficits can gradually lower circulating leptin, a hormone linked to hunger and metabolic rate, and can chip away at training performance and motivation over time. A planned higher calorie day, especially one weighted toward carbohydrates, is commonly used to briefly counter some of that drop, refill muscle glycogen, and make a longer deficit more sustainable.
Why macros shift on a refeed day
Protein typically stays steady across both regular and refeed days, since it supports muscle maintenance regardless of calorie level. Fat is usually reduced slightly on a refeed day, freeing up calorie room that shifts toward carbohydrates, which is the macronutrient most directly tied to glycogen replenishment and the leptin response researchers associate with refeeding.
For example, someone maintaining on 2400 calories a day who has been dieting at a 20 percent deficit, around 1920 calories, would see a refeed day bring them back up to that full 2400, a difference of 480 calories, most of which is commonly directed toward carbohydrates rather than spread evenly across all three macronutrients.
Common questions
Frequently asked questions
How many calories should a refeed day be?
Most refeed days bring calories back up to roughly your estimated maintenance level, the point where intake matches what your body burns in a day. That number depends on your stats and activity level, which is exactly what this calculator estimates for you.
How often should I have a refeed day?
Common approaches range from once a week to once every couple of weeks, often tied to how deep the deficit is and how someone responds physically and mentally. A larger deficit or longer diet phase sometimes calls for more frequent refeeds.
What's the difference between a refeed day and a cheat day?
A refeed day is a planned, calculated increase in calories, usually back to maintenance and weighted toward carbohydrates, aimed at supporting training and metabolic health. A cheat day is typically unplanned and unstructured, without a specific calorie or macro target in mind.
Should refeed day calories come mostly from carbohydrates?
Many structured approaches do shift the extra calories mostly toward carbohydrates while keeping protein steady and slightly lowering fat, since carbohydrate intake is most directly linked to refilling muscle glycogen.
Will one refeed day ruin my fat loss progress?
A single day at or near maintenance calories represents a small fraction of your weekly energy balance and is generally not enough to meaningfully change fat loss progress over time, though individual responses do vary.
Is a refeed day the same thing as a diet break?
No. A refeed is typically a single day, while a diet break usually means returning to maintenance calories for a longer stretch, often one to two weeks, before resuming a deficit.