Fitness Calculators & Converters

Six tools for the math side of training and fitness tracking: a weight converter for kilograms, pounds, and stone; a running pace calculator that finds pace, finish time, or distance; a BMI calculator with WHO classification ranges and an explicit limitations table; a 1-rep max estimator using Epley and Brzycki formulas with a training percentage table; a barbell plate calculator for lbs and kg with per-plate enabling; and a body fat estimator using the US Navy circumference method. Every tool in this category applies a named formula to the numbers you provide. Results are reference values — not health advice. Consult a qualified professional before making decisions about your training or health.