Calorie Calculator
Find your daily calorie needs for weight loss or gain.
🔥 BMR = calories burned at complete rest. TDEE = total daily burn including activity. Eat less than TDEE to lose weight.
What Is This Tool?
This calculator estimates your daily calorie needs using the Mifflin-St Jeor equation, the most accurate formula for most people. It shows your BMR (calories at rest) and TDEE (total daily burn including activity), plus targets for losing or gaining weight.
How Calorie Needs Are Calculated
The Mifflin-St Jeor formula estimates BMR from your weight, height, age, and sex. Your TDEE multiplies BMR by an activity factor (1.2 for sedentary up to 1.9 for very active). To lose weight, eat below TDEE; to gain, eat above.
Safe Rate of Change
- Mild loss: −250 cal/day ≈ −0.25 kg (0.5 lb) per week
- Standard loss: −500 cal/day ≈ −0.5 kg (1 lb) per week
- Aggressive loss: −1000 cal/day ≈ −1 kg (2 lb) per week (not for everyone)
- Don't eat below 1,200 cal (women) or 1,500 cal (men) without medical supervision
Why Estimates Vary
These formulas are accurate within about ±10% for most people, but individual metabolism varies based on muscle mass, genetics, hormones, and gut health. Use the number as a starting point and adjust based on real-world results over 2-3 weeks.
Frequently Asked Questions
Should I count "net" or "total" calories?
For weight loss, total calories matter most. Exercise apps often overestimate calories burned by 20-30%, so don't "eat back" all your exercise calories.
About the Calorie Calculator
The Calorie Calculator lets you figure out calorie calculatorinstantly, without reaching for a spreadsheet or doing the math by hand. Whether you're planning a budget, checking a loan, or working through homework, the tool applies the correct formula behind the scenes and shows the result the moment you enter your numbers.
Unlike a static chart or table, this calculator adapts to your exact inputs. You can adjust any value and see the outcome update in real time, which makes it easy to compare scenarios — for example, "what if the rate were 1% lower?" or "what if I paid an extra $50 a month?"
How to Use This Tool
- Enter the main values the calculator asks for (for example, amount, rate, and time).
- Pick the right unit or option where the tool offers a choice.
- Read the result, which appears instantly below the inputs.
- Adjust any field to test a different scenario — the answer updates without a reload.
- Copy or note the result. Nothing is stored, so close the tab when you're done.
Why Use an Online Calculator?
Browser-based tools like this one have a few real advantages over installed software or manual methods:
- No installation. It opens instantly in any browser, on any operating system.
- Private by default. Everything runs locally, so your data stays on your device.
- Always up to date.There's nothing to update — you always get the latest version when you load the page.
- Free and unlimited. Use it as often as you like, with no account and no caps.
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