It is the question behind almost every weight-loss plan: how much can I lose by a specific date? A wedding, a holiday, a medical appointment, the end of the month.
The honest answer has two parts, because the number on the scale is measuring two different things.
The short answer
- A realistic, sustainable month of fat loss is 1–3 kg (roughly 2–7 lb).
- Your first month will often show more (3–5 kg), because of water and stored carbohydrate, not fat.
- After the first month, 1.5–3 kg a month is a good, steady pace for most people.
| Daily deficit | Fat loss per month (approx.) |
|---|---|
| 250 kcal | ~1 kg |
| 500 kcal | ~2 kg |
| 750 kcal | ~3 kg |
| 1,000 kcal | ~4 kg |
Those figures come from the rough rule that 7,700 calories of deficit equals a kilogram of body fat. They describe fat. The scale also shows everything else.
Why the first month looks so good
When you cut calories, and especially carbohydrates, your body draws on glycogen: the carbohydrate stored in muscles and the liver. Each gram of glycogen is stored with around three grams of water. Most adults hold 400–500 g of glycogen, so emptying part of it can release 1–2 kg of water within the first one to two weeks.
Eating less food also means less food and salt sitting in your digestive tract, which can be another half a kilogram.
So a person on a 500-calorie deficit might see this:
| Month 1 | Month 2 | |
|---|---|---|
| Fat lost | ~2 kg | ~2 kg |
| Water and glycogen | ~1.5 kg | ~0 kg |
| What the scale shows | ~3.5 kg | ~2 kg |
The fat loss was identical. The second month felt like it slowed down by almost half. This is the moment most people decide their diet has stopped working and either quit or cut calories further. Neither is necessary.
How much weight can you safely lose in a month?
Most health guidance puts a safe, sustainable rate at 0.5–1 kg a week, which is 2–4 kg a month. For people with a lot of weight to lose, the upper end is fine; for people closer to a healthy weight, the lower end is more sensible.
A useful way to scale it is by percentage: about 0.5–1% of body weight per week.
| Starting weight | Sensible monthly loss (0.5–1% a week) |
|---|---|
| 60 kg | 1.2–2.4 kg |
| 70 kg | 1.4–2.8 kg |
| 80 kg | 1.6–3.2 kg |
| 100 kg | 2.0–4.0 kg |
| 120 kg | 2.4–4.8 kg |
Faster than this is possible for short periods, usually at the cost of muscle, energy and the odds of keeping the weight off. The weight loss percentage calculator shows where you are.
Can you lose 5 kg in a month?
As total scale weight in the first month, it is possible for people starting at a higher weight, perhaps 2–3 kg of fat plus 1.5–2 kg of water. That requires a deficit of 600–800 calories a day and a starting weight where that deficit is reasonable.
As fat loss alone, 5 kg in a month needs a deficit of about 1,250 calories a day, every day. For most people that means eating well under 1,200–1,500 calories, which is hard to sustain and is the kind of intake that should be medically supervised.
Can you lose 10 kg in a month?
No, not as fat. That would need a daily deficit of around 2,500 calories, which for most people is, more than their entire daily burn. Programmes that promise it are counting water, glycogen and gut contents, and those return as soon as normal eating resumes. Losing 10 kg realistically takes five to six months.
Planning a month
If you have a date in mind, work backwards:
- Find your maintenance calories. TDEE calculator.
- Set a deficit of 10–20% below it, usually 300–600 calories.
- Expect the first week to run ahead of the plan. Do not adjust anything because of it.
- Weigh daily, read weekly averages. Compare the average of week four with week one, not two single mornings. Why your weight fluctuates daily.
- Give it the full month before changing anything. Three weeks is the minimum for a real signal.
The weight loss timeline calculator turns a pace into a date, with a week-by-week calendar you can check against.
What makes one month turn into three
A month of weight loss is easy compared with the month after it. The things that help most:
- A deficit you barely notice. If you are hungry all day, the pace is too fast.
- Protein at every meal. It is the most filling macronutrient and protects muscle. How much protein you need.
- Not cutting whole foods you love. Rice, roti, sweets, chai. Portion them instead.
- Logging the weekends. Weekday deficits are routinely erased by two unlogged days.
- Measuring more than the scale. A waist measurement or how your clothes fit often moves when the scale does not.
Tracking the month
A month is long enough to learn what your normal days actually contain, and short enough to stay motivated. What makes it work is having a real record, not a perfect one.
BetterCal keeps that record without the database searching: type or say what you ate, and it is logged with calories and macros. Weight syncs from Apple Health or Health Connect so you can see the trend beside the intake.
Log a meal the way you would write it down. BetterCal turns a plain sentence, spoken or typed, into calories and macros. Free to start.
Download BetterCal on the App Store · Get BetterCal on Google Play
Frequently asked questions
How much weight can I lose in a month?
A realistic, sustainable amount of fat loss is 1–3 kg a month. The first month often shows 3–5 kg on the scale because of water and glycogen loss, which does not continue into month two.
Is losing 4 kg in a month healthy?
For someone with a higher starting weight, yes. It is about 1 kg a week. For someone at 60 kg, 4 kg a month is fast and will likely include more muscle loss than is ideal. Scaling by percentage (0.5–1% a week) is a better guide.
Why did I lose weight fast the first week?
Mostly water. Eating less, especially fewer carbohydrates, empties glycogen stores, and each gram of glycogen is held with about three grams of water. It is a one-off drop, not a rate.
How many calories should I cut to lose 2 kg a month?
About 500 calories a day below your maintenance. That produces roughly 0.45 kg of fat loss a week, or close to 2 kg over a month.
Why did I lose nothing this month?
Usually because the deficit is smaller than the log suggests (cooking oil, drinks and weekends are the common gaps), or because water retention is hiding real fat loss. See why you're not losing weight in a calorie deficit.
Related: how long to lose 10 kg · calorie deficit calculator · what is a calorie deficit
