Health & Lifestyle Calculators
9 free calculators · NZD
BMI Calculator
Calculate your Body Mass Index (BMI) instantly.
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation.
Calorie Calculator
Calculate your daily calorie needs for maintenance, weight loss, or weight gain.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Macros Split Calculator
Calculate your daily protein, carbs, and fat macros from your calorie target.
Ideal Weight Calculator
Calculate your ideal weight range based on height and healthy BMI. Find your target weight.
Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
Running Pace Calculator
Calculate running pace per km and per mile from your distance and time. Convert between pace and speed.
Heart Rate Zone Calculator
Calculate personalised heart rate training zones using the Karvonen method. Find your fat burn and aerobic zones.
Related Guides & Articles
Ideal Weight Guide: Formulas, Healthy Ranges & Reality
Understand what ideal weight really means, the different formulas used to calculate it, healthy weight ranges, and why the number on the scale isn't everything.
6 min readHeart Rate Zones Guide: Train Smarter with HR Monitoring
Understand heart rate training zones, calculate your max heart rate, and learn how to train in the right zone for fat burning, endurance, or performance.
7 min readRunning Pace & Training Zones Guide for All Levels
Understand running pace, training zones, and race time predictions. Whether you're a beginner or experienced runner, improve your performance with structured training.
8 min readBMI Calculator Guide: What Is a Healthy BMI?
Understand BMI ranges, what they mean for your health, and the limitations of using BMI as a sole health indicator. Plus how to calculate yours accurately.
7 min readBody Fat Percentage: Healthy Ranges & How to Measure
Learn about healthy body fat percentage ranges for men and women, different measurement methods, and why body fat is a better health indicator than BMI alone.
9 min readCalorie Deficit for Weight Loss: How to Calculate Safely
Learn how to create a safe calorie deficit for sustainable weight loss. Understand how many calories you need, how to track them, and avoid common mistakes.