Calorie Needs Calculator
Estimate resting and maintenance energy with the Mifflin–St Jeor equation and compare activity assumptions. Adult estimates, not a diet prescription.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Calorie Needs Calculator
- Choose units, measurements or a session preset. Review the supported scope beside the controls.
- Adjust the plan and review the visual result. For a timer, select Start; Pause, Reset and Next remain available where applicable.
- Save a private summary, schedule or log if offered. Nothing is uploaded or automatically saved.
What are the limits of Calorie Needs Calculator?
Mifflin–St Jeor resting-energy estimate for adults 20–100, multiplied by a chosen heuristic activity factor. Actual needs vary; activity factors are assumptions, not measured metabolism. Excludes pregnancy and breastfeeding. No weight-loss target or deficit is prescribed. Inputs and logs stay in page memory. No account, upload, health-data analytics, browser storage or medical-record synchronization. Leaving or refreshing the page can clear the session; explicitly downloaded files contain your information. Exports are local PNG/PDF summaries, CSV schedules or logs, and a sleep calendar where offered. These tools are for general planning and estimates, not diagnosis or individualized treatment.