Calories & weight calculators

7 free calculators · instant · nothing you enter is uploaded

Energy balance is the quiet arithmetic under every change in weight: calories taken in, calories used up, and what the difference does over time. These calculators estimate how much energy your body uses at rest and across a normal day, then show what a deficit or a surplus adds up to over weeks and months. The formulas behind them are well established for groups of people, but every individual sits somewhere on a curve, so use the result as a starting estimate and adjust from what actually happens.