Health

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

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

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

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

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

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

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

Estimate Army body fat from tape measurements and compare your result with the age- and sex-based Army limit.

Calculate running pace, finish time, distance, and split times in miles, kilometers, meters, or track laps.

Estimate lean body mass with Boer, James, and Hume formulas or calculate it directly from body fat percentage.