10 Services from fitness-calc.x402tookit.com

Estimates one-repetition maximum (1RM) strength from a given weight and rep count using four established formulas, and returns a percentage table of training loads.

Calculates estimated due date, gestational age, trimester, and key pregnancy milestones from the last menstrual period date using the Naegele rule.

Calculates calories burned during a physical activity using MET values, body weight, and duration.

Calculates estimated maximum heart rate (Tanaka and Fox formulas) and five training zones by percentage of max or heart-rate reserve (Karvonen method) from age and optional resting HR.

Calculates protein, carbohydrate, and fat grams from a daily calorie target using a preset ratio or custom percentage split.

Calculates basal metabolic rate (Mifflin-St Jeor), total daily energy expenditure by activity level, and a calorie target adjusted for a desired weekly weight change.

Calculates running pace per km and per mile, speed in km/h and mph, and predicts finish times for other race distances using the Riegel formula from a given distance and finish time.

Calculates ideal body weight in kg and pounds using four clinical formulas (Devine, Robinson, Miller, Hamwi) given height and sex.

Calculates body mass index from weight and height (metric or imperial), returns the WHO adult category, and the healthy weight range for normal BMI (18.5–24.9).

Estimates body fat percentage using the US Navy tape-measure method, returning fat mass, lean mass, and body composition category from circumference measurements.