Calorie Deficit Calculator
Calculate calorie deficit with clear inputs and instant results.
Your inputs
Updates instantlyYour result
Calculated locallyAdult educational estimate, not a diagnosis or personalized nutrition plan. Not for children, pregnancy, breastfeeding, or medical dietary needs. Consult a qualified professional before changing your diet.
Behind the answer
Maintenance × (1 − deficit fraction)
Change the inputs to explore your own scenario. Results use full calculation precision and are rounded for display.