Our Mission: Democratizing Fitness Science
Fitness Gen was born out of a simple observation: while the world of fitness is filled with incredible information, the tools to apply that information are often locked behind paywalls, cluttered with advertisements, or buried in overly complex apps.
Why We Exist
We believe that everyone, regardless of their background or budget, should have access to the mathematical models that drive elite performance. Whether you're a professional athlete, a weekend warrior, or someone just starting their health journey, precision matters.
Purely Functional
No distractions. No social feeds. Just the tools you need to calculate your path to success.
Science-Based
Our calculators use industry-standard formulas, from the US Navy body fat method to the Harris-Benedict equation.
Our Commitment
We are committed to maintaining a clean, privacy-focused environment. We don't track your personal health data beyond the immediate session, and we will never sell your information. Our goal is to be the most reliable, easy-to-use fitness utility belt on the web.
The Science Behind the Tools
Macronutrient Calculations
Our Macro Calculator utilizes the Mifflin-St Jeor Equation, widely regarded by dietitians as the most accurate way to estimate Basal Metabolic Rate (BMR).
Strength & Power Estimations
For 1RM (One Rep Max) estimations, we employ the Brzycki Formula, developed by Matt Brzycki. This formula is particularly effective for predicting strength in the 1-10 rep range.
Body Composition Analysis
Our body fat estimator uses the US Navy Body Fat Formula. It calculates body density based on various body circumference measurements, offering a high-accuracy, cost-effective alternative to professional scans.
Our Design Philosophy
We believe that a tool should be as invisible as possible. In an era of "attention economy," Fitness Gen stands as a sanctuary of utility.
Zero Latency
By performing all calculations on your device, results are instantaneous.
Privacy First
Calculations happen in your RAM, not on our cloud. Your stats stay yours.
No Silos
We don't try to keep you in an "ecosystem." Use the tool and get back to your workout.