Health

Health and fitness calculators

Strength, body metrics, weight screening, and training support tools with working calculator logic.

1 Rep Max Calculator

Compares multiple formulas, recommends a working max, and outputs practical training weights.

Scores all 6 events, returns a total out of 600, and flags any event below minimum passing levels.

Calculates BMI, healthy weight range, and an optional waist-to-height ratio cue for extra context.

Suggests bedtimes or wake times using 4 to 6 sleep cycles, fall-asleep time, and custom cycle length.

Estimates BMR, TDEE, goal calories, and a practical macro split for lose, maintain, or gain goals.

Estimates overall lifespan and healthy years from age, smoking, exercise, sleep, and BMI-style factors.