📋 Health Information · Editorial Team
How to Lose a Stone Safely
One stone is 14 pounds (6.35 kg). The NHS recommends losing 1 to 2 lb per week, which means a realistic timeline of 7 to 14 weeks. This guide shows you how.
Medical disclaimer: This article is general information, not medical advice. Speak to your GP before starting a weight-loss programme, especially if you have a health condition, take medication, are pregnant, or have a history of disordered eating. The NHS offers free weight-management support through your GP surgery.
The Maths Behind Losing a Stone
One pound of body fat stores roughly 3,500 calories. A stone is 14 pounds, so losing a stone requires a total energy deficit of about 49,000 calories. That number sounds large, but spread over time it becomes manageable.
| Weekly loss | Daily deficit needed | Time to lose a stone |
|---|---|---|
| 1 lb / week | ~500 kcal | 14 weeks |
| 1.5 lb / week | ~750 kcal | 9-10 weeks |
| 2 lb / week (NHS max) | ~1,000 kcal | 7 weeks |
The NHS advises aiming for 0.5 to 1 kg (1 to 2 lb) per week. This pace preserves muscle, keeps your metabolism healthy, and builds habits that last. Crash diets that promise a stone in a month typically cause water and muscle loss, followed by rapid regain.
The 4 Pillars of the Plan
1. Set Your Calorie Target
The NHS suggests around 1,400 kcal per day for women and 1,900 kcal per day for men when aiming to lose weight. These are starting points, not prescriptions. Taller, heavier, or more active people need more; shorter or less active people may need slightly less. Use our BMI calculator to find your starting point.
Track your food for the first two weeks using a free app. Most people underestimate their intake by 20 to 30 percent, so honest tracking is the single most useful habit you can build.
2. Eat for Satiety, Not Restriction
Extreme restriction backfires. Instead, build meals around protein and fibre, which keep you full on fewer calories:
- Protein: aim for 1.2 to 1.6 g per kg of body weight daily (chicken, fish, eggs, lentils, Greek yoghurt)
- Fibre: 30 g per day from vegetables, oats, beans, and whole grains
- Cut liquid calories: sugary drinks, milky coffees, and alcohol are the easiest calories to remove
- Regular meals: skipping meals usually leads to overeating later
3. Move More (Both Exercise and Daily Activity)
The NHS recommends at least 150 minutes of moderate activity per week (brisk walking, cycling, swimming) plus strength exercises on two days. But daily movement matters just as much: walking 8,000 to 10,000 steps a day can burn 300 to 400 extra calories without a gym.
Strength training twice a week protects your muscle while you lose fat. Bodyweight exercises (squats, push-ups, lunges) are enough to start.
4. Protect Your Sleep
Sleeping less than 7 hours raises hunger hormones and cravings. People who sleep well lose more fat and less muscle on the same diet. Treat 7 to 9 hours of sleep as part of the plan, not a luxury.
What to Expect Week by Week
Weeks 1-2
Fastest drop, mostly water weight as glycogen stores deplete. Expect 2 to 4 lb. Motivation is high; use it to build tracking habits.
Weeks 3-6
Steady fat loss of 1 to 2 lb per week. Hunger may increase; prioritise protein and sleep. About half a stone gone.
Weeks 7-10
Progress may slow as your body adapts. This is normal. Recalculate your calorie target as you get lighter. Most people reach the stone milestone here.
Weeks 11-14
Final stretch for slower losers. Focus shifts to maintenance habits: the eating pattern you can keep for life.
Plateaus are normal. If the scale stalls for 2 to 3 weeks, check your tracking accuracy first (portion creep is the usual cause), then consider adding 2,000 daily steps or trimming 100 to 200 kcal. Avoid slashing calories drastically.
After You Lose the Stone: Keeping It Off
Studies consistently show that keeping weight off is harder than losing it. The habits that lost the stone are the habits that keep it off: regular meals, daily movement, adequate protein, and honest tracking when weight creeps up.
Weigh yourself weekly (not daily) and have a plan for a 3 to 5 lb regain: return to tracking for two weeks before it becomes a stone again. If you are struggling, your GP can refer you to an NHS Tier 2 weight-management programme, which provides structured support free of charge.
Frequently Asked Questions
How long does it take to lose a stone?
At the NHS-recommended safe rate of 1 to 2 pounds per week, losing a stone (14 lb) takes about 7 to 14 weeks. Faster loss is possible but harder to sustain.
How many calories do I need to cut to lose a stone?
One pound of body fat stores roughly 3,500 calories, so a stone requires a total deficit of about 49,000 calories. Spread over 10 weeks, that is roughly 700 calories per day.
Can I lose a stone in a month?
Losing a stone in 4 weeks means losing 3.5 lb per week, which requires a daily deficit of about 1,750 calories. The NHS advises against this pace because it risks muscle loss, nutritional deficiency, and rapid regain.
What is the safest way to lose a stone?
The NHS recommends a combination of a moderate calorie deficit (around 1,400 kcal per day for women, 1,900 for men), 150 minutes of moderate activity per week, and behaviour changes like regular meals and better sleep.
Will I lose muscle when losing a stone?
Some muscle loss is normal during weight loss, but you can minimise it by eating enough protein (around 1.2 to 1.6 g per kg of body weight daily) and doing resistance training two to three times per week.