Fitness Calculators

Simple, practical calculators to support your training decisions.

Disclaimer: These calculators provide estimates for educational purposes only. Results should not be considered medical advice. Always consult with a qualified healthcare professional before making decisions about your health or fitness.

Unit System:

BMI Calculator

Calculate your Body Mass Index

Height (inches)

Weight (lbs)

TDEE / BMR Calculator

Estimate your daily caloric needs

Age (years)

Sex

Height (inches)

Weight (lbs)

Activity Level

One Rep Max (1RM) Calculator

Estimate your maximum lift capacity

Weight (lbs)

Reps performed

Works best with 1-12 reps

Plate Loading Calculator

Figure out which plates to load on your barbell

Target weight (lbs)

Bar weight (lbs)

RPE to Intensity Calculator

Convert Rate of Perceived Exertion to training intensity

RPE (Rate of Perceived Exertion): 10 = max effort, 9 = 1 rep in reserve, 8 = 2 reps in reserve, etc.

RPE (6-10)

Reps performed

Tip: You can link directly to any calculator using URL anchors, e.g., /calculators#bmi or /calculators#tdee