Free Health Tools
Evidence-based calculators and tools to help you understand your health better. All tools run locally in your browser — no data is sent anywhere.
Blood Work Tools
Blood Test Unit Converter
Convert lab values between mg/dL, mmol/L, µg/dL, nmol/L, and other common units for 50+ biomarkers.
Use tool →Lab Test Abbreviation Lookup
Look up what TSH, ALT, CBC, HbA1c, and 100+ other lab test abbreviations mean.
Use tool →Fasting Timer for Blood Tests
Set your appointment time and get a countdown timer with fasting guidelines for accurate results.
Use tool →Blood Test Prep Checklist
Select your upcoming tests and get a personalized preparation checklist for the most accurate results.
Use tool →Blood Test Frequency Guide
Find out how often you should get blood work done based on your age, sex, and health profile.
Use tool →Body & Nutrition Calculators
BMI Calculator
Calculate your Body Mass Index with both metric and imperial units. Includes WHO category breakdown.
Use tool →TDEE Calculator
Estimate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation and your activity level.
Use tool →Water Intake Calculator
Find out how much water you should drink daily based on your weight, activity level, and climate.
Use tool →Macro Calculator
Get your ideal protein, carb, and fat split based on your calorie needs and fitness goal.
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