What "daily calorie needs" really means
Your body burns calories around the clock — keeping you warm, pumping blood, digesting food and powering movement. The MyPlate calorie calculator estimates that daily total so you know roughly how much to eat to stay the same weight, and how to adjust to lose or gain. It follows the spirit of the USDA's MyPlate guidance, which encourages balancing calories across fruits, vegetables, grains, protein foods and dairy.
How the number is calculated
The calculator works in two steps:
- Resting metabolism (BMR) using the Mifflin-St Jeor equation:
10 × kg + 6.25 × cm − 5 × age + 5 (men) or − 161 (women). - Total daily energy expenditure (TDEE) by multiplying BMR by an activity factor from 1.2 (sedentary) up to 1.9 (very active).
The weight-loss target subtracts about 500 calories a day for a moderate, sustainable deficit, and the gain target adds about 300 for a lean surplus.
Choosing the right activity level
This is where most estimates go wrong. "Moderately active" means genuine exercise three to five days a week plus a reasonably active daily life. If you sit most of the day and work out a few times a week, "lightly active" is usually closer to reality. Picking too high a level inflates your calorie target and stalls weight goals.
Building a balanced plate
Calories are only half the story. MyPlate suggests filling half your plate with fruits and vegetables, about a quarter with grains (ideally whole grains), and a quarter with protein, plus a serving of dairy or a fortified alternative. Hitting your calorie number with mostly whole foods keeps you fuller and better nourished than the same calories from refined snacks.
Track and adjust
Use this figure as a starting point, then weigh yourself weekly and watch the trend over two to four weeks. If the scale isn't moving the way you want, nudge calories by 100–200 a day. For gram-level protein, carb and fat targets, head to our macro calculator, or check your status with the BMI calculator.