Verified Formula, Methodology & Frequently Asked Questions: TDEE, BMR & Calorie Deficit Weight Loss Calculator (Mifflin-St Jeor)
Calculate your exact Total Daily Energy Expenditure (TDEE), Resting BMR, daily macro targets, and 12-week projected weight change.
Verified Mathematical Equation: BMR (Mifflin-St Jeor) = (10 × weight_kg) + (6.25 × height_cm) − (5 × age) + s; TDEE = BMR × Activity Multiplier
Frequently Asked Questions (FAQ)
How does the TDEE, BMR & Calorie Deficit Weight Loss Calculator (Mifflin-St Jeor) work in 2026?
Calculate your exact Total Daily Energy Expenditure (TDEE), Resting BMR, daily macro targets, and 12-week projected weight change. It uses the industry-standard formula (
BMR (Mifflin-St Jeor) = (10 × weight_kg) + (6.25 × height_cm) − (5 × age) + s; TDEE = BMR × Activity Multiplier) and updates your KPIs, visual breakdown bar, and comparison table at 60fps as you type or drag the sliders.How can I share my exact scenario with a client, partner, or spouse?
Click the 🔗 Share Scenario Link button at the top of the page. It encodes every input you entered directly into a custom URL so anyone who clicks your link sees your exact numbers immediately.
Is my financial data private and does this work offline?
Yes—100% of calculations happen locally inside your browser using JavaScript. No personal or financial inputs are ever transmitted to an external database.
Can I embed the TDEE, BMR & Calorie Deficit Weight Loss Calculator (Mifflin-St Jeor) on my own website or client portal?
Yes! Click </> Embed on Your Site (Free) above to copy a clean, responsive
<iframe> widget that automatically adapts to any screen size.