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Calorie Calculator: Daily Calorie Needs for Weight Loss & Gain

By ToolZoneX Team
June 2026

Whether you want to lose fat, maintain weight, or build muscle, it all starts with knowing how many calories you need daily. Our calculator uses your stats and activity level to provide personalized calorie targets.

How to Use Calorie Calculator

  • 1.

    Enter your age, weight, height, and gender
  • 2.

    Select your activity level (sedentary to very active)
  • 3.

    View maintenance calories
  • 4.

    See recommended intake for weight loss (-500 cal) and gain (+300 cal)

Key Features

  • Activity-level adjusted TDEE calculation
  • Targets for loss, maintenance, and gain
  • Based on Mifflin-St Jeor equation
  • Macro split suggestions (protein/carbs/fat)

When to Use This Tool

  • Creating a calorie deficit for fat loss
  • Lean bulking with controlled surplus
  • Adjusting intake after activity level changes
  • Understanding why weight plateaus happen

Frequently Asked Questions

A deficit of 500 calories/day from your TDEE leads to ~0.5 kg (1 lb) weight loss per week. Don't go below 1200 cal (women) or 1500 cal (men).

Yes, BMR decreases by about 1-2% per decade after age 20 due to muscle mass loss. Strength training helps maintain it.

Ready to get started?
Open Calorie Calculator

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