Guide
How to Get Into a Calorie Deficit
A calorie deficit just means eating a little less energy than your body uses, so it makes up the gap from stored fat. Here's how to set one up in five steps, without crash dieting or giving up the foods you like.
Quick answer: find your maintenance calories (your TDEE), eat about 300 to 500 calories less than that each day, keep your protein high, and check your weight trend after two to three weeks. The calorie deficit calculator does the math for you.
Step 1: Find your maintenance calories
Your maintenance number, or TDEE, is how many calories you burn in a normal day. Eat that much and your weight stays the same. It depends on your size, age, sex and how active you are, so there's no single number that fits everyone.
Get yours in 30 seconds with the TDEE calculator. If you sit at a desk most of the day, the desk job TDEE calculator works it out from your steps, which is often more accurate.
Step 2: Pick the size of your deficit
| Daily deficit | Weight loss per week | Best for |
|---|---|---|
| 250 kcal | ≈ ½ lb (0.23 kg) | Last few pounds, very active people |
| 500 kcal | ≈ 1 lb (0.45 kg) | Most people |
| 750 kcal | ≈ 1½ lb (0.7 kg) | People with more weight to lose |
| 1,000 kcal | ≈ 2 lb (0.9 kg) | Short term, larger bodies, ideally with a doctor |
Based on about 3,500 calories per pound (7,700 per kilo) of body fat.
Start with 500. It's the sweet spot between results you can see and hunger you can live with.
Step 3: Set your daily calorie target
Take your maintenance calories and subtract your deficit. Two examples:
- A 35-year-old woman, 5 ft 5 in (165 cm), 170 lb (77 kg), lightly active. Maintenance is about 2,020 calories, so her target is around 1,500 a day.
- A 40-year-old man, 5 ft 10 in (178 cm), 200 lb (91 kg), exercising 3 to 5 days a week. Maintenance is about 2,830, so his target is around 2,330 a day.
Don't go below about 1,200 calories a day for women or 1,500 for men without medical advice. Very low targets make it hard to get enough protein and nutrients, and they rarely last.
Step 4: Build meals that fit
A deficit feels easy or hard depending on what you eat inside it. These habits make the biggest difference:
- Protein at every meal. Eggs, chicken, fish, Greek yogurt, cottage cheese, beans or tofu keep you full for longer.
- Half your plate vegetables. They add volume for very few calories.
- Measure the oil, butter and dressing. A tablespoon of oil is about 120 calories, and it's easy to pour three.
- Drink water, not calories. Soda, juice and sweet coffee drinks add up fast without filling you up.
- Keep foods you love. Plan a treat into the week rather than banning it. Banned foods tend to win eventually.
What a 1,500-calorie day can look like
| Meal | Example | Calories |
|---|---|---|
| Breakfast | Greek yogurt with berries and ¼ cup granola | ≈ 280 |
| Lunch | Chicken salad wrap with a piece of fruit | ≈ 450 |
| Snack | Apple and a cheese stick | ≈ 180 |
| Dinner | 5 oz (140 g) salmon, ¾ cup rice, broccoli | ≈ 550 |
| Total | ≈ 1,460 |
Approximate values. Portion sizes and brands vary.
Step 5: Track for two weeks, then adjust
Every calculator gives an estimate. Your body gives the real answer. Weigh yourself three or four mornings a week, after the bathroom and before eating, and compare weekly averages.
- Losing about what you expected? Keep going.
- No change after three weeks? Cut another 100 to 200 calories or add a daily walk.
- Losing much faster than planned and feeling drained? Eat a little more.
Recalculate every 10 lb (4 to 5 kg) you lose, because a lighter body burns less. The calorie deficit calculator does this week by week and shows the date you're likely to reach your goal.
Ways to create a deficit without changing everything
| Small change | Saves about |
|---|---|
| Swap one 20 oz soda for water or a diet drink | 240 kcal a day |
| Walk an extra 4,000 steps | 150–200 kcal a day |
| Dressing on the side instead of poured on | 150 kcal a meal |
| Small fries instead of large | 250 kcal a meal |
| Black coffee or a splash of milk instead of a blended coffee drink | 300 kcal a drink |
Two or three of these together can add up to a 500-calorie deficit on their own.
Signs your deficit is too big
- You're hungry all day, every day.
- You feel tired, cold or irritable most of the time.
- Your sleep or workouts get worse.
- You're losing more than about 1% of your body weight a week after the first few weeks.
If that sounds like you, eat 200 to 300 calories more. Slower progress you can keep up beats fast progress you quit.
Common questions
Is a 500 calorie deficit good?
For most people, yes. A 500-calorie daily deficit leads to about 1 pound (0.45 kg) of fat loss a week, which is fast enough to see progress and gentle enough to keep up.
How do I know if I'm in a calorie deficit?
Your weight trend goes down. Weigh yourself a few mornings a week and compare weekly averages. If the average drops over two to three weeks, you're in a deficit.
Can I be in a calorie deficit without counting calories?
Yes. Smaller portions, more protein and vegetables, fewer sugary drinks and more walking can all create a deficit. Counting just makes it easier to know for sure.
Does exercise count toward a calorie deficit?
Yes. Burning extra calories through exercise or daily walking widens your deficit. Most people do best with most of the deficit from food and some from movement.
How long does it take to see results from a calorie deficit?
The scale often drops 2 to 4 pounds in the first week, mostly water. After that, expect around 0.5 to 1 pound a week with a moderate deficit. Clothes usually feel looser within 3 to 4 weeks.
This article is general information, not medical advice. If you have a health condition, are pregnant or take regular medication, check with your doctor before changing how you eat.