Simple, NHS-aligned health calculators to help you understand BMI, pregnancy timelines and more.
Calculate your Body Mass Index and see which NHS weight category you fall into, plus a healthy weight range.
Estimate your due date and current gestational week from your last period, conception date or IVF transfer date.
Estimate your total daily energy expenditure and general calorie guides for maintaining, losing or gaining weight.
See an estimated healthy weight range for your height using several common formulas, alongside the NHS BMI range.
Estimate the calories your body burns at complete rest, using the Mifflin-St Jeor or Harris-Benedict formula.
Track your current gestational week and day, trimester, and next NHS milestone from your last period, conception or IVF transfer date.
Estimate your ovulation date, fertile window and next expected period from your last period date and average cycle length.
Estimate your body fat percentage from tape measurements using the US Navy method.
What BMR and TDEE actually measure, the Mifflin-St Jeor formula used to estimate both, and a worked example showing exactly how activity level changes your daily calorie needs.
NHS BMI categories for adults, healthy weight ranges by height, how thresholds differ by ethnicity, and why BMI works best alongside other measures.
