Diet Diary

What is Diet Diary?

Diet Diary is a free browser game that simulates weight change with a pixel-art character. Enter your height, weight, age, and job, then choose meals, exercise, and sleep each day. Your character's weight and body shape change one day at a time based on calories in versus calories out. No sign-up or install needed.

• Pick breakfast, lunch, dinner, a snack, exercise, and sleep, and see your daily calorie balance
• Calories burned are based on your resting metabolism (Mifflin-St Jeor equation), how active your job is, and how hard you exercise
• Track your weight and BMI on a chart
• Real-life setbacks happen too: rainy days, lazy weekends, and stress binges

Your data is saved only in your browser and is never sent to a server.

For details, see How to Play and How the Math Works.