Free Fitness Tools
Free calculators with worked examples and reference tables. Estimate your calories, find your one-rep max, check your strength level, and more — all completely free.
Choose a tool for your question
Estimate your one-rep max, compare a lift with bodyweight-based strength benchmarks, or distinguish daily energy needs from calories used during exercise. Each guide explains its method, limitations and a worked example.
BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs
Calories Burned Calculator
Estimate calories burned during any exercise using MET values
Session calculator
Weightlifting Calorie Calculator
Match your training style, account for extra stopped time, and compare total with above-rest calories.
Estimate your session →Session calculator
Treadmill Calorie Calculator
Use speed and incline for walking or running. Compare flat and uphill sessions in metric or imperial units.
Estimate your session →Session calculator
Exercise Bike Calorie Calculator
Estimate indoor cycling calories from effort or measured watts, with transparent assumptions for stationary bikes.
Estimate your session →Session calculator
Walking Calorie Calculator
Use distance or steps and moving time. Adjust step length and compare total calories with calories above rest.
Estimate your session →Free AI Program Generator
Generate a personalized AI workout program for free
1 Rep Max Calculator
Estimate your one rep max from any rep range
Strength Standards
Compare your lifts to strength standards for your weight
More Calculators
3 Rep Max Calculator
Estimate your 3RM and 1RM
5 Rep Max Calculator
Estimate your 5RM and 1RM
8 Rep Max Calculator
Estimate your 8RM and 1RM
Bench Press Standards
How does your bench compare?
Squat Standards
How does your squat compare?
Deadlift Standards
How does your deadlift compare?
OHP Standards
How does your press compare?
Why Use Our Fitness Calculators
Built by lifters, for lifters. Our tools are designed to give you actionable data without the noise.
Science-Backed Formulas
Each calculator explains its equations or reference benchmarks, with examples and limitations to help you interpret the estimate.
Instant Results
No sign-ups, no paywalls. Get accurate fitness calculations in seconds, completely free.
Privacy First
Calculator inputs are used locally in your browser. The AI workout generator is a separate service.
Frequently asked questions
Are these fitness calculators free to use?
Yes, all Gymscore fitness calculators are completely free with no sign-up required. Calculator inputs are used locally in your browser. The AI workout generator is a separate service.
What formulas do your calculators use?
Our calculators use peer-reviewed formulas including Mifflin-St Jeor and Harris-Benedict for BMR, Brzycki and Epley for 1RM estimation, and MET values from the Compendium of Physical Activities for calories burned.
Take Your Training to the Next Level
These tools are just the start. Download Gymscore to get AI-powered form analysis, workout tracking, and personalized coaching — all in one app.