Weight loss calories:
set a daily target from your goal date

How many calories should you eat to lose weight?

Eat fewer calories than your body burns in a day, and the gap decides how fast you lose. Your daily burn is your TDEE (total daily energy expenditure); the calories you should eat are your TDEE minus the daily deficit you pick.

A weight loss calories calculator therefore needs two numbers: an estimate of what you burn, and a goal expressed in kilograms and weeks. Everything else is arithmetic. The estimate is the weak link, so treat the output as a starting target to test for two to three weeks, not a promise.

Notice that weight loss is not only fat. In the first week or two a good part of the change is water and stored carbohydrate, which is why early results look faster than the arithmetic predicts and later results look slower.

This guide works backwards from a goal, which is how most people think: how much do I want to lose, by when, and what does that mean for my plate.

The weight loss calories formula

If you do not know your TDEE, estimate it as BMR multiplied by an activity factor: about 1.2 for a desk job with little exercise, 1.375 for light exercise one to three days a week, 1.55 for moderate exercise three to five days a week, and 1.725 for hard exercise six to seven days a week. The TDEE guide explains how to estimate BMR.

The rule of thumb behind every deficit calculator is that about 7,700 kcal corresponds to 1 kg of body fat. It is an approximation, and it works best for short periods.

1. 1Estimate your TDEE.
2. 2Convert your goal to total calories: kg × 7,700.
3. 3Divide by the number of days to get the daily deficit.
4. 4Subtract that deficit from TDEE for your target.
5. 5Check the result is not extreme; if it is, extend the timeline.

Worked example: 5 kg in 16 weeks

A deficit of 344 kcal is not dramatic. It is roughly the energy in a fried snack such as a samosa, a large sweet lassi or a couple of rotis with ghee, which is why many realistic plans combine one small food change with a little more walking.

Think of the deficit as a budget you spend across the day, not a rule about a particular food. Some people trim the evening snack, others cut sugary drinks or swap fried snacks for roasted ones. What matters is that the average over the week lands near the target.

Deficit size versus pace of loss

Read the table from the left. A deficit of 200 kcal is barely noticeable but takes more than half a year to lose 5 kg. A deficit of 600 kcal is about 29% of TDEE, which many people find hard to hold for more than a few weeks and which can cost muscle and nutrients.

Health agencies commonly describe about 0.5 to 1 kg a week as a gradual pace for adults with a higher starting weight. For a lighter person, even 0.25 to 0.5 kg a week is a good result, and slower is perfectly fine.

Weight also does not move in a straight line. Water, salt, digestion and hormonal cycles can hide a week of fat loss, so judge progress on a two-to-four-week trend, not day to day.

How to use the result

The number you get is only useful if you can eat that way on a normal week. Check it against your routine: your office lunches, family dinners, festivals and travel. A target that survives those is worth far more than a perfect one that does not.

Start at your target and track your average weight for three weeks. If the trend is close to the expected loss, hold. If it is slower, check your logging before you cut further. If it is faster than planned and you feel weak or very hungry, eat more.

The same method works for any starting point. Take a person with a TDEE of 2,600 kcal who wants to lose 4 kg in 14 weeks. The deficit is 4 × 7,700 ÷ 98 days = about 314 kcal, giving a target near 2,286, or about 2,300 kcal a day.

Recalculate when your weight has fallen by about 3 to 5 kg. A lighter body burns slightly fewer calories, so the same intake gives a smaller deficit over time.

Plateaus are normal. If your weight has not moved for three weeks despite honest logging, the usual fixes are to re-estimate TDEE at your new, lighter weight or to add about 2,000 steps a day. Cutting calories further is the last resort, not the first.

When your goal weight is reached, you are not finished: you need a maintenance intake, which is your new TDEE. Move up in steps of about 100 to 200 kcal rather than all at once.

Mistakes that quietly undo the numbers

• Using BMR instead of TDEE as your starting point. BMR is what you burn at rest and leaves out all movement.
• Applying 7,700 kcal per kg over a year. The rule overestimates long-term loss because your burn drops as you get lighter.
• Eating back exercise calories from a watch or gym machine. These numbers are usually generous.
• Ignoring weekends. Eating at maintenance on two days a week removes two sevenths of your weekly deficit, so your real pace is slower than the daily number suggests.
• Setting an extreme target. Very low calorie diets belong under medical supervision.

Anyone with a medical condition, who is pregnant or breastfeeding, taking medication that affects weight, or with a history of disordered eating should set a calorie target with a doctor or dietitian. The numbers here are general education and not a prescription.