Weight Loss & Nutrition Calculators

Sustainable weight loss comes down to understanding energy balance -- the relationship between the calories you consume and the calories your body burns. Getting this right is not about crash diets or extreme restriction; it is about making informed, consistent adjustments based on your own numbers.

The starting point is your Total Daily Energy Expenditure. The TDEE calculator estimates how many calories you burn each day based on your basal metabolic rate, activity level, age, height, and weight. This figure represents your maintenance level -- the amount you would eat to stay exactly the same weight. From there, the calorie deficit calculator shows how reducing intake by a specific amount translates to weekly fat loss, using the well-established principle that roughly 3,500 calories equals one pound of body fat.

But calories alone do not tell the whole story. The macronutrient balance of your diet -- the ratio of protein, carbohydrates, and fats -- affects body composition, energy levels, satiety, and recovery from exercise. Our macros calculator sets personalised targets based on your goals, whether that is fat loss, muscle gain, or maintenance. The macro split calculator offers preset ratios for popular approaches like high-protein, low-carb, or balanced diets.

Protein deserves special attention during a calorie deficit because adequate intake protects lean muscle mass while your body draws on fat stores for energy. The protein calculator sets a daily target based on your body weight and activity level, while the muscle protein calculator optimises intake specifically for those combining weight loss with resistance training.

Knowing where you are starting matters as much as knowing where you are going. The BMI calculator provides a quick screening metric, though it has limitations for muscular individuals. The body fat percentage calculator gives a more nuanced picture of your body composition. The ideal weight calculator then shows evidence-based target ranges for your height and frame.

Tracking progress keeps motivation high. The weight loss percentage calculator shows your total progress as a proportion of starting weight, which is a fairer metric than absolute pounds lost. The weight loss timeline calculator projects how long it will take to reach your goal at your chosen deficit, and the weight loss stones calculator converts between measurement systems for those who think in stones and pounds.

Hydration is often neglected in weight loss planning, but even mild dehydration reduces performance and can be mistaken for hunger. The water intake calculator sets a personalised daily target based on your weight, activity, and climate. For those exploring meal timing strategies, the intermittent fasting calculator models popular protocols like 16:8 and 5:2, showing your eating and fasting windows.