🏥 Conception Calculator
Calculate estimated ovulation, fertile windows, and conception timelines.
What is a clinically healthy Body Mass Index (BMI) range?
According to standard World Health Organization (WHO) guidelines, a healthy BMI score lies between 18.5 and 24.9. A score below 18.5 is considered underweight, 25.0 to 29.9 is overweight, and 30.0 or above is classified as obese.
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the baseline energy (calories) your body burns at complete rest just to keep vital organs functioning. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor representing your daily physical work and exercise levels, showing maintenance calorie needs.
How does the US Navy Body Fat Calculator work?
The US Navy method utilizes specific height and body circumference measurements (neck and waist for men, plus hip for women) to calculate body density. Body fat percentage is then estimated using the Siri or Brozek equations. It correlates strongly with dual-energy X-ray absorptiometry (DEXA) scans.
What is Naegele's Rule for pregnancy due dates?
Naegele's Rule is the standard method for calculating due dates. It estimates pregnancy duration as 280 days (40 weeks) from the first day of the last menstrual period (LMP). Our calculator adjusts this rule automatically for cycle lengths other than 28 days to give a highly accurate prediction.