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Weight Loss Percentage Calculator

Compare two weights and calculate the amount and percentage lost or gained.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Change = current − starting weight. Percentage = absolute change ÷ starting weight × 100. No prediction of future weight. Educational food-planning arithmetic, not medical advice. Food labels and estimates can vary. Use a clinician or registered dietitian for a personalized plan, especially for children, pregnancy, breastfeeding, medical conditions, or an eating-disorder history.

How to use it (step by step)

  1. 1Use two comparable measurements and the same weight unit.
  2. 2Enter the starting weight and current weight.
  3. 3Read the change and percentage. No goal weight, score, or recommended loss rate is assigned.

Words to know

Calories / kcal
Food energy. A food-label Calorie means one kilocalorie (kcal).
Macros
Carbohydrate, protein, and fat: three nutrients that provide energy.
Serving
The amount used on a food label. It is not a recommendation for how much to eat.

Diet & Nutrition Tools

Plan portions, understand food labels, and compare your own nutrition numbers. No account or food upload needed.

Macro CalculatorCalorie Deficit CalculatorProtein Intake CalculatorNet Carb CalculatorFood Portion Calorie CalculatorRecipe Calorie CalculatorMeal Calorie Split CalculatorNutrition Daily Value CalculatorWeekly Calorie Average CalculatorFiber Intake CalculatorSugar Grams to Teaspoons CalculatorCalorie Calculator (BMR & TDEE)Meal & Food Diary

Sources & methods

References checked November 11, 2026. Read each tool’s scope and assumptions before relying on its result.

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