Fill in your details and click Calculate
How is your calorie deficit calculated?
Your calorie deficit is based on your Total Daily Energy Expenditure (TDEE) — the total calories your body burns per day accounting for your activity level. We first calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation, then multiply by an activity factor to get your TDEE.
A deficit of 500 calories per day results in roughly 0.5 kg (1 lb) of fat loss per week, since one kilogram of body fat contains approximately 7,700 calories.
FAQ
Frequently asked questions
A calorie deficit occurs when you consume fewer calories than your body burns in a day. This forces your body to use stored fat for energy, resulting in weight loss over time.
Still got questions?
We're happy to help
Reach our support team any time — we usually reply in under an hour.