Sam Gorman

Estimate body surface area from height and weight, choose a formula, and compare common BSA equations in m2 and ft2.

Classify body shape or somatotype from measurements, with ratios, frame size, and a borderline note for close calls.

Estimate adult or child eGFR from creatinine and cystatin C, with G category, interpretation, and optional deindexed result.

Estimate maintenance calories, BMR, and a daily calorie target for losing, maintaining, or gaining weight.

Estimate daily fat grams from calories, see a recommended range, and get a saturated fat upper limit in grams.

Estimate a daily protein target in grams from body weight, age, sex, and goal, with a minimum target and practical range.

Estimate daily carbs in grams from calories and carb percent, with optional meal and snack split planning.

Estimate daily calories and macros for lose, maintain, or gain, including a protein-first custom macro method.

Estimate your next period, ovulation, fertile window, future cycles, and optional due date from your last period start date.

Estimate conception date, due date, ovulation date, and likely fertile window from due date, LMP, ovulation, or IVF transfer.