Understand Your Body.
Build a Smarter Fitness Plan.
Calculate your BMI, calories, macros, protein, water intake and strength levels. Generate a personalized AI fitness report in minutes.
No account required · Metric & imperial units · 100% free
Free Fitness Calculators
Ten science-based tools. Instant results. No sign-up required.
BMI Calculator
Calculate your Body Mass Index and understand your weight category.
BMR Calculator
Find out how many calories your body burns at rest each day.
TDEE Calculator
Calculate your total daily calorie needs based on activity level.
Calorie Deficit Calculator
Set a sustainable calorie deficit for safe, steady weight loss.
Macro Calculator
Calculate your ideal protein, carbohydrate and fat targets.
Protein Calculator
Find your daily protein requirements based on your training and goals.
Body Fat Calculator
Estimate your body fat percentage using simple body measurements.
Ideal Weight Calculator
Find your healthy weight reference range based on height and BMI.
Water Intake Calculator
Calculate how much water you should drink each day.
One-Rep Max Calculator
Estimate your maximum lift and training percentages using the Epley formula.
Why Use Asterisks Fit?
Completely Free
All calculators and the AI fitness report are free to use, forever.
No Signup Required
Start calculating immediately. No account, email or password needed.
Metric & Imperial
Switch between kilograms/centimetres and pounds/feet at any time.
Privacy First
Your data is never stored on our servers or shared with third parties.
Personalized Results
Every result is calculated using your exact measurements and activity level.
Trainer Support
Connect with a certified personal trainer for hands-on guidance and a custom programme.
Need Personal Guidance? Talk to a Fitness Trainer.
Get a customised training programme, nutrition plan and ongoing support from a certified personal trainer.
From the Fitness Blog
View all articles →What Your BMI Actually Tells You (And What It Doesn't)
BMI is useful for population screening but has real limitations. Learn what BMI can and cannot tell you about your health.
5 min read →
NutritionHow Much Protein Do You Really Need? A Beginner's Guide
Protein requirements vary by training type and goal. This guide breaks down everything you need to know in plain language.
6 min read →
Nutrition & MetricsTDEE Explained: How to Find Your True Calorie Maintenance Level
Understanding your TDEE is the foundation of any nutrition plan. Learn how it's calculated and how to use it effectively.
7 min read →
Frequently Asked Questions
Asterisks Fit provides general fitness estimates for educational purposes only. Results are not medical diagnoses. Always consult a qualified healthcare professional before making significant changes to your diet or exercise routine. Read our medical disclaimer.