Health
BMI, basal metabolic rate, due date — wellness calculators. Not medical advice.
Alcohol Metabolism Calculator: When Can I Drive?
Estimate your blood alcohol concentration (BAC) curve with the Widmark formula. Enter gender, weight, drink type and volume to see when you can legally drive under China's 20/80 mg/100ml limits.
Baby Growth Percentile Calculator (WHO & China WS/T 423 Standards)
Calculate baby height, weight, head circumference and BMI percentiles using WHO LMS standards (0-60 months). Supports China WS/T 423-2022 reference data and preterm corrected age. Tracks growth for boys and girls aged 0-5 years.
BMR & TDEE Calculator · Mifflin-St Jeor + Harris-Benedict · 5 Activity Levels
Enter gender, age, height, weight to get Basal Metabolic Rate (BMR) instantly and TDEE across 5 activity levels, plus cut / maintain / bulk calorie targets. Switch between Mifflin-St Jeor (recommended) and Harris-Benedict formulas. Fully local.
Pregnancy Due Date Calculator · Gestational Age & Trimester
Enter your LMP (last menstrual period) to instantly get due date (Naegele's rule · LMP + 280 days), current gestational age (w+d), trimester (1st/2nd/3rd), countdown, and estimated conception date. Non-28-day cycles auto-adjusted. All local.
- 🔥 Hot
BMI Calculator · Body Mass Index with Healthy Weight Range
Instantly compute your Body Mass Index (BMI) from height and weight, switch between metric/imperial, compare WHO international vs Chinese (WS/T 428) Asian-population categories and see your healthy weight range. Runs entirely in your browser.