MTF MiniToolsFactory
🏃 Fitness & Physiology

Free Fitness, Athletics & Biometrics Hub No Email Needed

Free, private, browser-based fitness calculators for TDEE, macronutrient nutrition, Karvonen heart rate zones, 1RM strength, and hydration targets.

⚙️ Free

TDEE & Macro Calorie Calculator

Calculate Total Daily Energy Expenditure (TDEE), Basal Metabolic Rate (BMR), and exact macro gram targets for cutting, bulking, and maintenance.

⚙️ Free

Target Heart Rate Zone Calculator

Calculate your 5 cardiovascular heart rate training zones (Zone 1 to Zone 5) using the Karvonen formula and Heart Rate Reserve (HRR).

⚙️ Free

Daily Water Intake & Hydration Calculator

Calculate exact daily water intake in liters and fluid ounces tailored to your body weight, workout intensity, and climate heat.

⚙️ Free

One Rep Max (1RM) Calculator

Calculate your estimated 1-Repetition Maximum (1RM) for bench press, squat, and deadlift across Brzycki, Epley, and Lombardi formulas with 50-95% load tables.

⚙️ Free

Weight Loss Percentage & Pace Calculator

Calculate total body weight loss percentage (%), average weekly loss pace, and projected date to reach your goal weight.

About the Fitness, Athletics & Biometrics Hub

Scientific fitness tracking requires accurate mathematical modeling of human energy metabolism, cardiovascular training zones, and progressive neuromuscular overload. The Fitness, Athletics & Physiology Hub delivers zero-upload client-side tools designed for runners, strength athletes, and nutrition planners.

Utilize the Mifflin-St Jeor equation for basal metabolic rate, Karvonen heart rate reserve formulas for Zone 2 endurance pacing, and multi-formula 1RM strength benchmarks (Brzycki, Epley, Lander) without subscription fees or data harvesting.

Looking for other calculation categories?