Fill in the basics
Sex, age, height and weight set your basal rate.
Enter sex, age, height, weight and activity to get BMR and daily energy needs. Fat-loss and muscle-gain targets are listed alongside, ready for meal planning.
Open BMR & Daily Energy →Sex, age, height and weight set your basal rate.
Choose from sedentary to two sessions a day.
Use the lower number to cut, the higher to gain, the middle to maintain.
Use Manlin to reflect, plan and take your next step.

The formula estimates energy use, not body weight; muscle mass and individual variation matter.
Use it as a starting point, then adjust by 100–200 kcal after two weeks of tracking.