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🍎 Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, gender, weight, height and activity level.

How to use Calorie Calculator

1
Enter your age, weight and height
2
Select your gender
3
Choose your activity level and click Calculate

How to use Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, gender, weight, height and activity level. Use it when you need a quick result without installing a separate application.

  1. Enter your age, weight and height
  2. Select your gender
  3. Choose your activity level and click Calculate

Privacy and limitations

This tool runs in your browser and does not require an account. Results depend on the input, browser capabilities and device memory, so review important output before relying on it.

Related Tools

⚖️ BMI Calculator👟 Steps to KM Calculator

What is Calorie Calculator?

Calculate your daily calorie needs (TDEE) based on age, gender, weight, height and activity level.

Calorie Calculator is part of Smart2Office's suite of free browser-based productivity tools. It is designed to handle an everyday task that would otherwise require installing dedicated desktop software or paying for a subscription service. Open the page, use the tool, close it — nothing to set up, nothing to maintain, and nothing to pay.

The tool runs on any modern device — Windows PC, Mac, iPhone, Android phone or tablet — directly in your web browser. There is no version to update, no operating system compatibility issue, and no licence to renew.

✅ Key Features

  • Based on globally accepted medical and fitness reference formulas
  • Instant calculation as you change inputs
  • Plain-language interpretation of results
  • For informational guidance — consult a healthcare professional for medical decisions

💼 When to Use This Tool

  • Tracking a fitness metric as part of a personal health goal
  • Getting a quick estimate before a consultation with a healthcare provider
  • Setting daily calorie or activity targets

Tips for Best Results

  • BMI is a starting point — combine it with waist circumference and body fat percentage for a fuller picture.
  • For calorie targets, track actual intake for 2–4 weeks and adjust based on real-world results.
  • Research shows 7,000–8,000 steps per day delivers significant health benefits — you do not need to reach 10,000 to see results.

Technical Details

BMI: weight(kg) ÷ height(m)². Calories: Mifflin–St Jeor 2005. Stride: 41.5% × height(cm) ÷ 100. Results are estimates — not medical advice.

Frequently Asked Questions

Is BMI an accurate measure of health?
BMI is a population-level screening tool, not a clinical diagnosis. It does not account for muscle mass, bone density or ethnic background. Always consult a qualified healthcare professional for a complete health assessment.
How are daily calorie needs calculated?
We use the Mifflin–St Jeor equation (widely recognised as the most accurate for most adults), then multiply by an activity factor to estimate Total Daily Energy Expenditure (TDEE).
Are results medically accurate?
Results are general informational estimates only and are not a substitute for professional medical advice, diagnosis or treatment.
How is steps-to-distance calculated?
Stride length is estimated as approximately 41.5% of your height. Calorie burn is estimated at ~0.04 kcal per step. Actual values vary with speed, terrain and individual metabolism.
Should I see a doctor before changing my diet or exercise?
Yes, especially if you have existing health conditions. Use these tools for general guidance only, and always seek professional advice for personalised health plans.
🔒 Your Privacy & Security — All calculations are performed instantly in your browser using JavaScript. No data is sent to any server. The tool works fully offline once the page has loaded. Smart2Office does not track what you process, does not store output files, and does not share your data with third parties. What you create belongs entirely to you.