Intermittent Fasting: How Many Kg in a Month? 2–4 kg on 16:8

How Many Kg Can You Lose in a Month of Intermittent Fasting?

In one month of intermittent fasting you lose about 2–4 kg. That is 0.5–1 kg (1–2 lb) a week from week 2 onward, and 6–12 kg over three months on a consistent 16:8 schedule. Week 1 almost always shows a bigger drop than that, but most of it is water, not fat.

Here are the same numbers as quick labels:

• Per week: 0.5–1 kg (1–2 lb) of genuine fat loss, from week 2 onward.
• First month: 2–4 kg total, of which roughly 1–2 kg is week-1 water weight.
• 3 months on 16:8: 6–12 kg, and this is the range most people can hold on to.
• The limit: fasting only works through a calorie deficit, so eating window habits — not the fasting hours — decide your pace.

Your starting weight, how much you eat inside your eating window, and how consistently you fast set the exact pace. The table below shows what to expect at each stage.

16:8 Fasting Weight Loss Results, in Kg, Week by Week

Numbers at the higher end of each range apply to people starting with more body fat; those already close to a healthy weight land at the lower end.

How Much Weight Can You Lose in a Month With Intermittent Fasting?

In one month of 16:8 intermittent fasting, most people lose 2–4 kg (4.5–9 lb). The scale often shows more than that by the end of week 1, but 1–2 kg of the early drop is water and glycogen that comes straight back the first time you eat a large, carb-heavy meal. Judge month 1 by the number on day 30, not day 7.

How Many Kg Can You Lose in a Week With Intermittent Fasting?

From week 2 onward, expect 0.5–1 kg (1–2 lb) a week on 16:8. Week 1 usually reads 1.5–3 kg because glycogen stores and the water bound to them empty first. A steady 0.5–1 kg weekly is the pace that stays off; anything consistently faster than 1 kg a week usually means you are also losing muscle.

Why This Matters

Setting realistic expectations is one of the biggest predictors of whether someone sticks with intermittent fasting long enough to see real results. Too many people start a fasting protocol expecting to drop 10 kg in two weeks, get discouraged when the scale moves slower than that, and quit right before the real fat-loss phase begins. Understanding the actual, science-backed pace of weight loss helps you stay patient, track progress correctly, and avoid the disappointment that causes most people to abandon fasting within the first month.

How Much Weight Loss Is Realistic?

Weight loss from intermittent fasting comes down to one core mechanism: a calorie deficit. Fasting doesn't burn fat by magic — it works because shrinking your eating window naturally reduces how much food (and how many calories) you consume in a day. On average:

• Week 1: Often the biggest number on the scale, but 1–2 kg of this is water weight and glycogen depletion, not fat.
• Weeks 2–4: A more honest fat-loss rate begins — typically 0.5–1 kg per week for people with a moderate to significant amount of weight to lose.
• After 1 month: Total loss is commonly 2–4 kg, though people with more body fat to lose can see slightly faster results, and those closer to a healthy weight will see slower, smaller changes.
• After 3 months: With consistent fasting (5–7 days a week) and no significant overeating during the eating window, 6–12 kg of total loss is a realistic and sustainable range for many people.

It's important to understand that intermittent fasting protocols like 16:8, 18:6, or OMAD (one meal a day) don't inherently burn more fat than a normal calorie-controlled diet — they simply make it easier for many people to naturally eat less without obsessively counting calories. The scientific research on intermittent fasting consistently shows it produces weight loss results comparable to traditional calorie restriction, with the added benefit that many people find it easier to follow long term.

Genetics, activity level, sleep quality, stress, and hormonal factors (especially for women) all influence how fast the number on the scale moves. Two people doing the exact same fasting schedule can lose weight at noticeably different rates — and that's completely normal.

If you are doing a longer water fast rather than daily 16:8, the daily split between water and fat is different again — see how much weight you lose during a 3, 5 or 7-day fast, day by day.

Practical Tips to Maximize Fat Loss While Fasting

• Don't overeat during your eating window. The single biggest reason people don't lose weight on intermittent fasting is compensating for the fast by eating too much during the hours they can eat.
• Prioritize protein. Protein preserves muscle mass while you're in a calorie deficit, which keeps your metabolism working in your favor.
• Track trends, not daily numbers. Your weight can fluctuate 1–2 kg day to day from water retention, sodium, and hormones. Weigh yourself weekly at the same time for an accurate picture.
• Stay hydrated during your fasting window. Water, black coffee, and plain tea support fat metabolism and help control hunger without breaking your fast — and a pinch of salt in water does not break a fast either.
• Watch the sugar in "healthy" foods. Fruit is the usual hidden brake — see which 8 fruits stall fat loss on intermittent fasting.
• Be patient through weeks 2 and 3. This is when many people feel the scale "stall" right before a new drop — it's a normal part of the process, not a sign fasting has stopped working.
• Combine fasting with light activity. Walking or resistance training during your fasting window can accelerate fat loss without adding significant hunger.

Get the Complete Guide

For the complete intermittent fasting guide, get Intermittent Fasting in Practice on Amazon — and claim 3 months free on our fasting app at fastinginpractice.com/redeem

Frequently Asked Questions

What are typical 16:8 fasting weight loss results after 1 month, in kg?

On 16:8 the first month usually lands at 2–4 kg. Week 1 reads 1.5–3 kg on its own, but 1–2 kg of that is water and glycogen. Weeks 2, 3 and 4 each add 0.5–1 kg of real fat. Starting heavier puts you at the top of that range.

How many kilograms can I lose in one month with intermittent fasting?

Most people lose between 2 and 4 kg in their first month, with the first week often showing a larger drop due to water weight rather than fat.

Is 1 kg of weight loss per week too fast or too slow?

Losing around 0.5–1 kg per week is considered a safe, sustainable, and realistic pace for fat loss with intermittent fasting, without excessive muscle loss or metabolic slowdown.

Why did I stop losing weight after a few weeks of fasting?

This is usually a weight-loss plateau caused by your body adjusting to a lower calorie intake, water retention, or unconsciously eating more during your eating window. Reassessing portion sizes usually restarts progress.

Does intermittent fasting burn fat faster than regular dieting?

No single study shows intermittent fasting burns fat significantly faster than calorie-matched regular dieting — its main advantage is that many people find it easier to stick to consistently, which leads to better long-term results.

Sources

• A randomised trial of 16:8 measuring exactly how much weight is lost over 12 weeks. Lowe DA, et al. Effects of Time-Restricted Eating on Weight Loss and Other Metabolic Parameters in Women and Men With Overweight and Obesity: The TREAT Randomized Clinical Trial. JAMA Internal Medicine. 2020. PMID: 32986097
• Time-restricted eating compared with calorie restriction over a full year. Liu D, et al. Calorie Restriction with or without Time-Restricted Eating in Weight Loss. The New England Journal of Medicine. 2022. PMID: 35443107
• Time-restricted eating without calorie counting, measured against a control group. Lin S, et al. Time-Restricted Eating Without Calorie Counting for Weight Loss in a Racially Diverse Population : A Randomized Controlled Trial. Annals of Internal Medicine. 2023. PMID: 37364268
• 16:8 and 14:10 compared for weight and metabolic outcomes. Sukkriang N, et al. Effect of intermittent fasting 16:8 and 14:10 compared with control-group on weight reduction and metabolic outcomes in obesity with type 2 diabetes patients: A randomized controlled trial. Journal of Diabetes Investigation. 2024. PMID: 38932663