Calorie Deficit Calculator
Find the daily calorie target that gives you steady fat loss without crashing your energy, mood, or muscle.
Your Stats
Enter your weight, height, age, and activity level to see your daily calorie target.
What Is A Calorie Deficit?
A calorie deficit means you are eating fewer calories than your body uses in a day. When that happens, your body pulls the missing energy from stored fat, and you lose weight.
Every diet plan, fast, or trendy program comes back to this one rule. Keto, intermittent fasting, low fat, plant based. They all work only when they put you in a deficit. The question is not which diet works, it is which deficit you can actually stick to.
- • Mild: around 250 calories under TDEE, very gentle pace
- • Moderate: around 500 calories under TDEE, the sweet spot
- • Aggressive: around 750 calories under TDEE, short term only
- • Goal: 0.5 to 1 percent of body weight per week
How We Calculate Your Deficit
We start from your TDEE, then subtract the deficit that matches the pace you pick. The math uses the well known rule that 1 kilogram of body fat holds about 7,700 calories.
Find Your TDEE
Mifflin-St Jeor BMR multiplied by your activity factor gives the calories you burn in a normal day.
Pick Your Pace
Mild, moderate, or aggressive. Each one matches a different daily deficit and weekly fat loss target.
Subtract and Eat
Your daily calorie target is TDEE minus the deficit. Hit it consistently and the scale follows.
Factors That Influence Your Deficit
The right deficit for you is not just a number. These variables shape what works.
Starting Body Weight
Heavier bodies tolerate larger deficits because absolute fat stores are bigger. Leaner bodies need smaller, slower deficits.
Lean Muscle Mass
More muscle means a higher floor of calories you can eat and still lose fat. Defending muscle keeps the deficit working long term.
Activity and Training Load
If you train hard 5 days a week, a steep deficit will crush recovery. Lower activity weeks tolerate slightly larger gaps.
Food Quality and Protein
High protein and fiber make any deficit easier to live with. Ultra processed foods make it almost impossible.
Sleep and Stress
Bad sleep and chronic stress raise hunger hormones and lower NEAT. The same deficit feels twice as hard.
Diet History
If you have dieted hard for years, your body may need a slower start and more maintenance breaks before the next push.
Tips To Make Your Deficit Stick
- 1
Lock Protein First
1.6 to 2.2 grams per kilogram of body weight. It protects muscle, keeps you full, and makes the deficit feel smaller.
- 2
Eat Mostly Whole Foods
Lean meats, fish, eggs, dairy, beans, fruit, vegetables, oats, rice, potatoes. They take up space on the plate without blowing your calorie budget.
- 3
Walk Every Day
7,000 to 10,000 steps per day adds 200 to 400 calories of burn without the recovery cost of hard cardio.
- 4
Weigh in Daily, Average Weekly
Daily weight bounces 1 to 2 kg from water and food. The 7 day average is what shows real fat loss.
- 5
Plan a Refeed Every 8 to 12 Weeks
1 to 2 weeks at maintenance gives hormones and motivation a reset before the next push.
- 6
Build the Diet You Can Repeat
If you cannot picture eating this way 6 months from now, change it. Sustainable beats optimal every time.
Calorie Deficit FAQ
Quick answers to the questions people ask most.