Calorie Calculator – Estimate Your Daily Calorie Needs
Estimate your daily calorie needs for losing, maintaining or gaining weight.
About the Calorie Calculator
What is the Calorie Calculator?
A calorie calculator estimates your daily calorie requirement and adjusts it to your weight goal.
Why use this calculator?
Weight change is governed by the calorie balance equation. Knowing your number makes any diet plan concrete instead of abstract.
How to use it
- Enter your age, gender, height and weight.
- Pick your activity level and goal.
- Read your daily calorie target.
- Revisit the number as you lose or gain weight.
Formula
Calories = BMR × activity factor ± goal adjustment.
Estimates; the real answer comes from your weekly trend. Deficit targets below 1,200 kcal are unsafe without medical guidance.
Frequently Asked Questions
How fast should I lose weight?
Roughly 0.5–1 kg per week is sustainable for most people. Faster loss risks muscle and rebound.
Why am I not losing at 500 kcal below maintenance?
The maintenance estimate may be off, portions may be larger than you think, or your activity dropped. Track for two weeks, then adjust by 100–150 kcal.
Is this a medical diagnosis?
No. This tool provides general wellness information only. It is not a substitute for evaluation by a qualified healthcare professional.
Why do results differ from my doctor's measurements?
Clinical measurements use calibrated equipment and professional technique. Home estimates rely on formulas and self-reported values, so small differences are normal.
How often should I recalculate?
Recheck after meaningful changes such as weight gain or loss, a new workout routine, or every few months to track trends over time.
Do these formulas apply to everyone?
Most population formulas are less accurate for athletes, pregnant people, very young children and the elderly. Use them as a general guide.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.