Free Calorie Deficit Calculator
See how your chosen weight-loss pace changes your daily Calorie target. Our free calorie deficit calculator estimates maintenance, then subtracts a deficit to suggest how much to eat.
Enter your stats and usual activity, then choose a weekly rate. Your result is the intake target after that adjustment, plus suggested macros for planning meals. The pace you select is a starting point, not a forecast.
What Is a Calorie Deficit?
A calorie deficit means eating fewer calories than you use over time. Your maintenance calories, also called Total Daily Energy Expenditure (TDEE), cover your whole day: resting energy use, movement, and digesting food. The deficit is the gap between that amount and what you eat.
Daily intake target = maintenance calories − calorie deficit
For example, estimated maintenance of 2,400 calories minus a 400-calorie deficit gives an intake target of 2,000 calories a day. These are example numbers, not a recommendation for everyone.
Your “Calories per day” result already has the deficit taken out. Use it as the amount to eat; you don't need to subtract another 400 or 500 calories. This page shows the intake target, without a separate maintenance or deficit readout.
Make a Meal Plan Around Your Target
Select Generate Meal Plan below your results to carry your calorie and macro targets to the homepage planner. Choose how many meals you want, then use its generate button to get meals and recipes around those numbers.
You can generate a plan without an account. If you want to enter your own macro targets, including numbers you've worked out with a dietitian, create a free account to customize them.
How We Calculate Your Calorie Deficit
We estimate resting energy use from your age, sex, height, and current weight with the Mifflin-St Jeor equation. An activity multiplier turns that into estimated maintenance calories. Your Low, Medium, or High body-fat choice affects protein suggestions, not this calorie estimate.
We then subtract an amount based on the Weight Change rate you select. For weight loss, our calculation uses 3,400 calories per requested pound, divided across seven days. For example:
| Selected weekly rate | Approximate daily reduction |
|---|---|
| ½ lb (about 0.23 kg) | 243 calories |
| 1 lb (about 0.45 kg) | 486 calories |
The rate selector stays in pounds per week even when your stats use Metric units. The calculation limits this reduction to half of estimated maintenance and rounds the result; that limit isn't a personal safety assessment.
The selected pace is a planning input, not a forecast. Energy expenditure changes as you lose weight, so a fixed calorie reduction won't produce the same amount of weight loss indefinitely (Hall et al., 2011). For more on the maintenance estimate and activity choices, see our TDEE calculator.
How Large Should Your Calorie Deficit Be?
Start with a pace that leaves room for regular meals, your usual activities, and foods you enjoy. A 500-calorie reduction takes a much larger share of a 1,800-calorie maintenance estimate than a 3,000-calorie one. The same deficit won't suit everyone.
The CDC's weight-loss guidance favors gradual, steady loss over rapid loss. Choosing the fastest setting doesn't make it the best fit for you. If a target is hard to eat within or leaves you feeling run-down, try a slower rate and get individual advice rather than pushing the number lower.
Judge the plan over a few weeks, using your weight trend alongside hunger, energy, and training. If progress differs from the selected pace, review your inputs and routine before making an adjustment. The FAQ below covers when to recalculate and how to avoid counting exercise twice.
Making Room for Protein, Carbs, and Fat
A calorie target tells you how much energy to plan for. The macro suggestions help you put meals together within that amount. “At least” means a suggested minimum in grams; these amounts don't need to add up to all your calories, and they aren't a fixed percentage split.
For weight loss, our starting protein amount depends on weight, body-fat category, and activity. Carbs use weight and activity, while fat starts at 0.3 g per pound of body weight (about 0.66 g/kg). Diet presets and the calorie budget can change those amounts. These are meal-planning suggestions, not a guarantee that every individual's nutrition needs are covered.
Include foods you like across the day: for example, yogurt or tofu at breakfast, a bean or chicken lunch, and vegetables with rice and fish or tempeh at dinner. Our protein calculator has more food ideas, and the macro calculator explains the rules behind the suggested grams.
Frequently Asked Questions
How do I use this calorie deficit calculator?
Enter your current stats. Choose U.S. Standard or Metric units, then enter your sex, height, current weight, and age. Use your current weight, not the weight you want to reach.
Choose body fat and usual activity. Select Low, Medium, or High body fat; Medium is a starting point if you’re unsure. This adjusts protein suggestions, not calories. Choose activity based on your workday, everyday movement, and exercise together.
Submit and review your pace. After submitting, choose your preferred diet and review the Weight Change setting above the results. This page keeps the goal set to weight loss. The weekly rate is shown in pounds even with Metric units, and changing it updates your daily calorie target.
Check the target and plan meals. The Calories per day result already includes the deficit. Change Settings lets you edit your stats. Select Generate Meal Plan to carry your targets to the homepage, choose the number of meals, then use its generate button to create meals.
How accurate is the result, and when should I recalculate?
It’s an estimate of your energy needs, not a measurement of your metabolism. Give yourself a few weeks to look for a trend instead of reacting to one weigh-in. Review your average intake, portions, usual activity, and how you feel before changing the target.
Recalculate when your weight or routine changes meaningfully. Energy needs can change during weight loss, so a starting deficit won’t necessarily stay the same (Hall et al., 2011). There’s no need to follow a fixed recalculation schedule.
Should I eat back the calories I burn exercising?
Your activity choice already includes your usual exercise. Automatically adding every workout’s calories on top can count that activity twice. If your training or job changes enough to make the selected level a poor fit, update the activity setting and review the new target. The TDEE calculator explains the activity options.
Do I need to eat exactly this many calories every day?
No. The number is a planning target, and meals don’t need to hit it exactly. Look at your usual intake over time, with enough flexibility for days that go differently. If you eat more than planned one day, return to your normal routine rather than trying to make up for it by skipping meals.
Can I use this page for maintenance or muscle gain?
This page keeps weight loss selected, so it doesn’t show a control for changing that goal. Use the calorie calculator to choose Maintain weight or Build muscle, or the TDEE calculator to explore maintenance calories.
What if the calorie target seems too low?
Check your units and stats first, then try a slower weekly rate. The calculator’s numerical limits don’t establish a safe minimum intake for you. If the result leaves too little room for regular meals, or you’re persistently hungry, tired, or struggling with training, review the plan with a registered dietitian or healthcare professional. Don’t treat the lowest number the form returns as a goal.
Health & Fitness Calculators
Looking at a different part of your plan? Choose the calculator that answers your next question.
- Calorie Calculator
- Choose a daily intake for your goal, check how it works for you, and turn it into meals.
- TDEE Calculator
- Estimate what you burn in a typical day and understand your maintenance Calories.
- BMR Calculator
- Estimate the energy your body uses at rest, before activity and a weight-change goal.
- Macro Calculator
- Plan protein, carbs, and fat in grams with room for different food choices.
- Protein Intake Calculator
- Get a daily protein suggestion and find ways to reach it with everyday foods.