Reverse Diet Calculator
Plan a gradual, week-by-week increase from your current calorie intake to estimated maintenance. This reverse dieting calculator shows your timeline, weekly calorie targets, and macro split — along with honest evidence limits.
Built and reviewed by Jesse · Last reviewed
Enter your details to see a week-by-week plan for gradually increasing your calories.
- Enter your current daily calories. The intake you have been eating at the end of your diet.
- Set your weekly increase. Choose a planning increment of 50, 100, or 150 calories per week.
- Follow the week-by-week plan. Each row shows that week's calories and macro targets as you ramp back to maintenance.
What this reverse diet planner does
A reverse diet is a planned increase in food intake after a calorie deficit. This tool estimates your maintenance calories with the Mifflin–St Jeor equation and an activity multiplier, then maps a 50, 100, or 150 kcal weekly increase from your current intake to that estimate. It holds protein at 1.8 g per kilogram, assigns 25% of calories to fat, and puts the remaining calories into carbohydrate.
What the evidence does—and does not—show
Reverse dieting is popular in physique sports, but it has often been promoted more confidently than the evidence allows. A 2025 preliminary randomized study compared gradual calorie increases, an immediate return to estimated maintenance, and an unrestricted approach after a diet. The gradual approach did not significantly reduce weight regain compared with the other strategies. Use this calculator as a scheduling tool, not as proof that a slow ramp will “repair” metabolism or prevent fat gain.
Metabolic adaptation during weight loss is real, but it is not the same as permanent metabolic damage. A lighter body generally burns fewer calories, the thermic effect of food falls when intake is lower, and spontaneous movement can decrease. Some effects can ease as intake and body weight stabilize. The exact response differs between people and cannot be predicted from height, weight, and age alone.
Choosing an increase
The three pace options control the length of the plan; they are not safety ratings. If your current intake is 1,700 kcal and estimated maintenance is 2,300 kcal, adding 50 kcal per week takes about 12 weeks, 100 kcal takes about 6 weeks, and 150 kcal takes about 4 weeks. A smaller step may suit someone who values a tightly controlled transition. A larger step ends the deficit sooner.
Maintenance is itself an estimate. Track a seven-day average of body weight, hunger, energy, and training performance rather than reacting to one weigh-in. Increasing carbohydrate also restores glycogen and associated water, so an early scale increase is not automatically body fat. After two to three consistent weeks, adjust the endpoint if the trend shows that calculated maintenance was too high or too low. If you want to understand how many calories to eat to lose weight before starting a reverse, see the guide on how many calories to lose weight.
When not to use this calculator
This tool is for adults transitioning from an ordinary, self-directed calorie deficit. It is not appropriate for someone who is underweight, has an eating disorder or signs of low energy availability, or has completed an extreme or medically supervised diet. Nutritional rehabilitation can require clinical monitoring. In those cases, work with a doctor or registered dietitian instead of an automated schedule.
If you only need to estimate the endpoint, use the TDEE calculator. To divide a chosen calorie level into macros without a weekly ramp, use the macro calculator.
Weekly calorie ramp
week N calories = starting calories + (N x weekly increase)
macros each week: protein = 1.8 x weight(kg), fat = 25% of calories, carbs = remainder- N
- = week number in the plan (1, 2, 3, ...)
- weekly increase
- = calories added each week (you choose the size)
The increments are planning choices, not a clinically validated formula. A 2025 preliminary trial did not find gradual increases more effective than an immediate return to estimated maintenance for limiting weight regain.
What is reverse dieting?
Reverse dieting is a structured way to increase calories gradually after a deficit until you reach estimated maintenance. It can make the transition easy to monitor, but current evidence does not show that it prevents weight regain better than returning directly to maintenance.
How does this reverse diet calculator work?
It estimates your maintenance calories from your stats (using the Mifflin-St Jeor equation and your activity level), then builds a week-by-week plan that adds a small, steady number of calories each week until you reach maintenance.
How many calories should I add each week?
This planner offers increments of 50, 100, or 150 calories per week. These are convenient planning choices, not clinically proven ideal amounts. A smaller increment creates a longer transition; a larger increment reaches estimated maintenance sooner.
How long does a reverse diet take?
It depends on the gap between your current intake and your maintenance calories, and your chosen pace. Many reverses run 8–16 weeks. This calculator shows the exact number of weeks for your inputs.
Does reverse dieting repair a damaged metabolism?
No calculator can support that claim. Energy expenditure often falls during weight loss because a smaller body needs less energy and people may move less. Eating more raises the thermic effect of food and can support training, but reverse dieting has not been shown to uniquely “repair” metabolism.
Should I reverse diet or go straight to maintenance?
Both are reasonable planning approaches for healthy adults. A gradual increase may feel easier to monitor; returning to estimated maintenance ends the deficit sooner. A 2025 preliminary randomized study found no significant advantage for reverse dieting in limiting weight regain, so preference and context matter.
Is this medical advice?
No. These are estimates for healthy adults. If you have a medical condition, a history of disordered eating, or are pregnant, please talk to a doctor or registered dietitian first.
How do I know if my reverse diet is working?
Track a seven-day rolling average of body weight rather than reacting to daily readings. A successful reverse diet typically shows stable or very slowly rising weight (under 0.3 kg per week) as calories increase. Rising energy, better training performance, and improved hunger regulation are also positive signs. If weight climbs faster than expected, you may have reached your actual maintenance below the calculator estimate — adjust the endpoint down and continue more slowly.
What should my macros be during a reverse diet?
Keeping protein high throughout is the main priority — it supports muscle retention as calories increase. This calculator holds protein at 1.8 g per kilogram of body weight and increases carbohydrates as calories rise, since carbs replenish muscle glycogen and support training. Fat is held at roughly 25 percent of total calories. You can adjust the final macro split using the macro calculator once you reach your maintenance target.
References
- Mifflin MD, St Jeor ST, Hill LA, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247.
- Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition Position Stand: protein and exercise. J Int Soc Sports Nutr. 2017;14:20.
- Peos JJ, et al. The effects of reverse dieting on mitigating weight regain after a caloric deficit: a preliminary analysis. J Int Soc Sports Nutr. 2025.
FitCalcs calculators provide general estimates for healthy adults and are not medical advice.
Related calculators
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and find out how many calories you burn per day.
Macro Calculator
Find your daily calories and macros — protein, carbs, and fat — for your goal.
Calorie Deficit Calculator
Find your maintenance calories and exactly how much to eat to lose weight at your chosen pace.