How to Lose 70 kg in 5 Months: What Is Actually Possible

Quick answer

No. Seventy kilograms in five months is not possible, by any method. Seventy kilograms of fat holds about 539,000 calories, which over five months means a deficit of roughly 3,550 calories a day — more than most people burn in total. Eating nothing at all for five months would produce about 57 kg. This is not a discipline problem; the arithmetic does not exist.

What five months can realistically deliver is 15 to 25 kg at this starting weight — genuinely more than a lighter person could lose, because a heavier body burns more.

Seventy kilograms itself is a 2 to 3 year project, and this is the part most pages leave out: at this weight it is usually not a willpower question. Losing 70 kg is around 45–50% of body weight for most people reading this — more than bariatric surgery, or the strongest weight-loss medication, reliably delivers on its own. If years of effort have not worked, that is not a personal failure. It means you are living with a severe, treatable illness and you are entitled to treatment. Read that section first.

And the most useful number on this page: the first 10% is where almost all the health benefit is. At 150 kg that is 15 kg — achievable inside five months — and it measurably improves blood pressure, blood sugar, cholesterol, sleep and joint pain. You do not have to reach 70 kg to get most of what you came for.

Jump to: The arithmetic · What 5 months delivers · The medical options · Tests to get first · Why nothing has worked · The plan · FAQ

Why five months cannot happen

A kilogram of body fat stores roughly 7,700 calories. Seventy kilograms is about 539,000 calories, and five months is about 152 days.

Now compare that with what a body at this weight actually spends. A sedentary man of 150 kg at 170 cm burns around 2,870 calories a day in total — everything included. A woman of 140 kg at 160 cm, around 2,400.

The required deficit is larger than the entire daily expenditure. Which means that even at zero food intake for the full five months, the maximum possible loss is around 50 to 57 kg — and you would not survive the attempt.

This is worth stating plainly because the alternative explanation is so much worse for you. If 70 kg in five months were achievable and you failed at it, that would be about you. It isn’t achievable, so it isn’t.

Exercise does not change the answer. A 45-minute brisk walk at this weight burns roughly 300 to 400 calories. You would need about nine of them a day, on top of eating nothing.

What five months can realistically deliver

Here is the honest version. These figures are higher than you will see on general weight-loss pages, because at a high starting weight the early loss genuinely is faster — a bigger body burns more, so the same eating pattern creates a larger deficit.

Month one will be your best month by a wide margin — often 6 to 9 kg, of which 3 to 4 kg is glycogen and the water bound to it rather than fat. Every gram of stored carbohydrate holds about three grams of water; cut carbohydrate and calories and that water goes within days. It is a real change on the scale and not a real change in fat, and knowing that in advance is the difference between reading month three as a failure and reading it as normal.

Months two to five typically run 2 to 4 kg each.

The 10% that matters

The single most useful thing to know about a goal this size is that the health benefit arrives early and almost all of it is in the first 10%.

At 150 kg, 10% is 15 kg. That is inside five months. At that point, most people see measurable improvement in blood pressure, fasting glucose or HbA1c, cholesterol, sleep apnoea severity, knee and back pain, breathlessness on stairs, and energy. If you have type 2 diabetes, a 10–15% loss is in the range where remission becomes possible for some people.

You do not need to reach 70 kg lost to get most of what you actually want. Aim at the 15 kg. Then aim at the next 15.

The part most pages leave out: at this weight, obesity is treated

If you need to lose 70 kg, your BMI is almost certainly in the mid-40s or higher.

Those numbers sit far above the thresholds at which Indian clinical guidance treats obesity as a disease requiring treatment rather than advice:

• Weight-loss medication — semaglutide, tirzepatide, both now approved in India — is indicated at BMI 30 or above, or 27 with a weight-related condition.
• Bariatric and metabolic surgery, per the Obesity and Metabolic Surgery Society of India, is considered at BMI 37.5 or above without other conditions, and 32.5 or above with them.

Everyone reading this page clears both, most of them by a very wide margin.

What those treatments actually achieve — and why it reframes your goal

Read the right column against your goal. Seventy kilograms is roughly 45–50% of body weight for most people here — more than any single treatment in that table reliably delivers. Getting there generally means surgery combined with sustained change over years, or a combination of approaches, with medical follow-up throughout.

This is the honest answer to “why hasn’t anything worked?” — and it is a far kinder answer than the usual one. Severe obesity is a chronic disease with a strong biological component. Lifestyle change is necessary for every route and sufficient for very few people at this scale. That is not a moral fact about you.

What we are not doing is recommending a drug or an operation. Both carry real risks, real costs and permanent follow-up requirements. Surgery in particular requires more dietary discipline afterwards, not less, and lifelong vitamin supplementation and monitoring. Medication has significant side effects and, in the STEP 1 trial extension, people who stopped semaglutide regained about two thirds of the weight over the following year. These are decisions for a doctor who has examined you.

What we are saying is: book the appointment. Ask for a proper obesity assessment. If you have spent years on internet diets, that appointment is likely to be the most useful hour of the whole project.

Two things that stay true on every route. Protein — 1.2 to 1.6 g per kg of body weight a day — and resistance training twice a week, because roughly a quarter of any large weight loss comes off as lean tissue, and that proportion is what you can influence. This matters as much on medication or after surgery as it does without them.

Tests worth having before you start

At this weight, several conditions are likely, treatable, and change what the first few months should look like. Most of them also improve quickly as weight comes off.

• Obstructive sleep apnoea. Very common at this weight and often undiagnosed. If you snore heavily, wake unrefreshed, or fall asleep during the day, ask. It fragments sleep in exactly the way that drives appetite, and treating it usually makes losing weight easier.
• Type 2 diabetes or prediabetes — HbA1c or a fasting glucose.
• Blood pressure and lipids.
• Thyroid function (TSH) — an underactive thyroid slows results and is straightforward to treat.
• Liver — fatty liver is common, silent, and improves with weight loss.
• PCOS and insulin resistance, if relevant.
• Vitamin B12, vitamin D and a blood count — deficiency is common and causes the fatigue that makes everything harder.
• Knees, hips and back, which decide what exercise makes sense in month one.

If you already take medication, speak to your prescriber before you change your diet. Insulin and sulfonylureas such as glimepiride, gliclazide or glibenclamide can cause hypoglycaemia when you cut calories without a dose review, and blood-pressure medication often needs reducing as the weight comes off. Fitelo runs a diabetes programme built around exactly this.

Why nothing has worked so far

Four honest reasons, in the order they usually apply.

1. The scale of the goal versus the scale of the tool. See the section above. For a 70 kg target, diet and exercise alone is usually the wrong-sized tool, and that has nothing to do with effort.

2. You are eating less, but not less than enough. This is the commonest practical reason and it is very easy to miss. Three home-made rotis with sabzi and curd can cross 800 to 900 calories in one meal. Add chai with biscuits twice a day and you can be in a surplus on food that feels light. Home-cooked is not the same as low-calorie, and nobody’s estimate of their own intake is accurate — most people are 300 to 500 calories out.

3. Untreated conditions. Hypothyroidism, sleep apnoea and insulin resistance all slow results, and all are testable. Dieting harder against an untreated thyroid is a losing strategy.

4. Your maintenance falls as you get lighter — a lot, at this scale. Across a 70 kg loss, maintenance drops by roughly 700 calories a day. The plan that produced a deficit at 150 kg produces almost none at 100. Recalculate every 5 to 10 kg; this is the single commonest reason a plan that worked in month two has stalled by month eight.

One correction to something you will read often: your metabolism is not “broken” or “confused”. Expenditure falls because you are a smaller person, plus a modest additional adaptation whose size researchers still argue about. Severe restriction makes it worse by costing you muscle. That is the whole mechanism, and it is manageable rather than mysterious.

What to do in the meantime

None of this replaces the appointment. All of it works alongside whatever route you end up on.

Weeks 1–2: measure, don’t restrict. Weigh under the same conditions each morning, record your waist, and log what you already eat without editing it. Then fix the two things that cost nothing: measure cooking oil with a spoon, and stop drinking calories — sugar in tea, soft drinks, juice, sweetened coffee. For many households that alone is 400 to 600 calories a day.

Weeks 2–4: protein and portions. A protein source in every meal — dal, rajma, chana, curd, paneer, soya, egg, chicken or fish. Aim for 1.2 to 1.6 g per kg. Half the plate vegetables, a quarter protein, a quarter carbohydrate. Do not cut out rice or roti; cut the portion and add to the vegetables. See our Indian weight-loss diet plan for charts and quantities.

Movement: start low-impact and mean it. You do not need a gym. At this weight, running and jump-based training load knees, ankles and hips hard, and form breaks down fast. Start with brisk walking, 20 to 45 minutes a day, built up gradually — or cycling, swimming, water aerobics or a cross-trainer if walking hurts. Add two short strength sessions a week from week two or three: bodyweight squats to a chair, wall or bench push-ups, a band row, a plank. That is what protects your muscle.

Sleep and stress are not optional extras here. Short sleep raises intake by 250 to 360 calories a day in randomised trials, and at this weight broken sleep is often apnoea rather than habit.

Food to cut first: sugary drinks and juice, deep-fried food, biscuits and packaged snacks, sweets, and alcohol. Not all carbohydrate — keep dal, rajma, millets, oats, fruit and whole grains.

Cheat meals: plan them. Ninety per cent consistent with one planned indulgence a week beats four strict weeks followed by a collapse. A goal measured in years cannot be run on restriction.

Tracking, for a project this long

The scale is the noisiest signal you have, and you need better ones over two to three years.

• Weekly average, not daily readings. Individual days move 1 to 2 kg on water and salt alone.
• Waist circumference every fortnight. At this weight it tracks health risk more closely than weight does, and it often improves during scale plateaus.
• Photos monthly, same light, same clothes.
• How stairs feel. How you sleep. Whether your knees hurt. These change before the mirror does.
• With your doctor: blood pressure, HbA1c, lipids. These usually improve inside the first 10%, and they are the actual point.
• Log food 3 to 4 days a week, not every day. Enough to see patterns, not enough to become a preoccupation.

Frequently asked questions

Is it possible to lose 70 kg in 5 months?

No. Seventy kilograms of fat is about 539,000 calories, which over 152 days means a deficit of roughly 3,550 calories a day — more than most people burn in total. Even eating nothing for the whole five months would produce around 57 kg. No diet, medication or surgery delivers 70 kg in five months.

How many kg can I lose in 5 months?

At a starting weight of 140–150 kg, realistically 15 to 25 kg with good adherence — more than a lighter person could lose, because a heavier body burns more. Month one is usually the largest, and 3 to 4 kg of it is water.

How long does it actually take to lose 70 kg?

Two to three years, and at this scale it usually needs medical support rather than lifestyle change alone. Seventy kilograms is roughly 45–50% of body weight for most people asking, which is more than bariatric surgery or the strongest medication reliably delivers on its own.

What is a safe rate of weight loss?

About 0.5 to 1 kg a week for most people — 2 to 4 kg a month. At a very high starting weight, up to roughly 1% of body weight a week is defensible in the early months under medical supervision, which at 150 kg is about 1.5 kg a week initially, slowing as you get lighter.

Should I be thinking about weight-loss medication or surgery?

That is a doctor’s decision, but you should know you qualify. Medication is indicated at BMI 30 or above; Indian surgical guidance puts bariatric surgery at BMI 37.5 or above without other conditions, and 32.5 with them. At 140–160 kg your BMI is likely in the mid-40s or higher. Surgery typically produces 25–35% of body weight over one to two years; tirzepatide produced 20.9% at 72 weeks in trials. Ask for an assessment rather than spending another year alone.

Why haven’t I lost weight despite trying everything?

Most often because the goal is bigger than the tool — at this scale lifestyle change alone rarely produces a loss this size, and that is a fact about the disease, not about you. Practically: home-cooked food is easy to underestimate (three rotis with sabzi and curd can be 800–900 calories), untreated thyroid, sleep apnoea or insulin resistance slow results, and your maintenance falls by roughly 700 calories across a 70 kg loss, so old targets stop working.

Do I need to go to the gym?

No. Brisk walking for 20 to 45 minutes a day plus two short bodyweight strength sessions a week is enough, and at this weight low-impact work is better for your joints than running. The strength sessions matter because they protect muscle, not because they burn much.

What happens to my body if I try to lose weight too fast?

Greater muscle loss — about 23% of the weight lost on very-low-calorie diets against 14% on moderate ones — a roughly threefold higher risk of symptomatic gallstones, hair shedding that shows up three to four months later, nutrient deficiencies, fatigue, and a rebound. Loose skin is also more likely with faster loss, and after a loss this size some excess skin is common regardless and may need surgical treatment.

Is 70 kg a healthy weight?

That is a different question from losing 70 kg, and it depends on height. Using the cut-offs recommended for Asian Indians — healthy 18.5–22.9, overweight 23–24.9, obesity 25 and above — 70 kg is a BMI of 27.3 at 160 cm (obesity), 24.2 at 170 cm (overweight), and 22.9 at 175 cm, which is the top of the healthy range. So 70 kg is a healthy weight only for adults roughly 175 cm and taller.

What if the scale stops moving?

First check whether your target is out of date — after 15 kg lost, your maintenance has fallen by about 150 calories. Then portion creep, reduced daily movement, water retention and sleep. Under two weeks without movement is fluctuation, not a plateau. Cutting food further should be near the end of your options, not the start.

Will I have loose skin?

After a loss this size, some is likely. Gradual loss, adequate protein and resistance training all help, and it often improves over the first year. Significant excess skin after a very large loss is a surgical question rather than a skincare one, and it is worth discussing with your surgeon if you are having bariatric surgery — many people plan both.

Related: How to lose weight from 100 kg to 70 kg · What is actually possible in a month · Indian weight loss diet: 7-day plan

How this article was researched

This guide is written and edited by Fitelo’s content team. It has not been reviewed by a clinician, and it is general information rather than medical or dietetic advice.

Rates and risks are sourced to health authorities and clinical bodies where they exist (CDC, NICE, OSSI, ICMR-NIN) and to named trials where they do not. The surgical and medication outcome figures are from published trials and cohort data and are group averages: individual results vary widely, which is itself part of why these are decisions for a doctor.

An earlier version of this article gave three different “safe rates” — 2–4 kg a month in the body, 0.5–1 kg a week in the summary, and 4–6 kg a month plus “20–30 kg in 5 months” in the FAQ. The FAQ figures were roughly 50% above the page’s own guidance and have been corrected. The earlier version also assessed 70 kg as a body weight using global BMI cut-offs rather than the Indian ones, said extreme dieting can “confuse your body”, and claimed movement “helps burn belly fat efficiently”. Most importantly, it did not mention that at this weight obesity is a treatable disease with established medical and surgical options; that section has been added and is now the core of the page.

Medical disclaimer

This article is general information and is not a substitute for individual medical advice. It has not been reviewed by a doctor or dietitian.

At a body weight where losing 70 kg is the goal, seeing a doctor is not a formality. You are very likely to meet published clinical criteria for the medical and surgical treatment of obesity, and likely to have at least one associated condition worth diagnosing and treating. Book that assessment before, not after, you start.

The BMI thresholds and trial outcomes quoted here are described so that you know what to ask about. They are not a recommendation, and eligibility is assessed by a clinician. Medicines named are prescription-only; obtaining them without a prescription is unsafe. Bariatric surgery carries operative risk and requires lifelong nutritional follow-up.

Speak to your prescriber before changing your diet if you take insulin, a sulfonylurea, or blood-pressure medication, whose doses may need adjusting as your intake and weight change.

Very-low-calorie diets and total diet replacement products should only be used under medical supervision within a specialist service.

If you are struggling with how you feel about your body or your eating, Tele-MANAS, the Government of India’s national mental health helpline, is free and confidential on 14416, 24 hours a day.