Health Calculators

Enter your diet type, calorie target, meals per day, and food preferences to get a 7-day menu with macro breakdowns and an automated grocery list.

Add each beer, wine, spirit, or cocktail. You get calories, exercise minutes to burn them, standard drinks, and a weekly and annual weight projection.

Select the eye colors of both parents and optional grandparents to calculate probability percentages for brown, green, and blue eyes.

Track your baby's height, weight, and head circumference against WHO growth standards. Get instant percentile rankings with visual growth charts for boys and girls aged 0-24 months.

Estimate how much milk your baby needs each day and per bottle from age and weight. Shows a healthy daily range, the amount per feed and a 24-hour schedule, in millilitres or fluid ounces, with formula-ceiling safety guidance.

Enter drinks consumed, body weight, gender, and elapsed hours to calculate your estimated BAC and see how it compares to the 0.08 US legal driving limit.

Estimate your biological age based on lifestyle, health metrics, and habits. Compare your body's functional age to your chronological age across 4 health dimensions with personalized improvement recommendations.

Calculate your next eligible blood donation date based on donation type. Track whole blood, plasma, platelet, and double red cell donations with personalized countdown and eligibility guidelines.

Interpret your blood pressure reading against AHA/ACC 2017 clinical categories. Get your BP classification, pulse pressure, mean arterial pressure (MAP), and personalized health insights with an animated visual gauge.

Convert blood sugar levels between mg/dL (US) and mmol/L (UK/International) with instant results, diabetes risk assessment, visual range indicators, and comprehensive glucose reference charts.

Enter each caffeinated drink and the time consumed to plot an hourly decay curve, see your bedtime caffeine level, and check your 400 mg daily limit.

Calculate your safe daily caffeine limit based on body weight, then see the equivalent in espresso shots, cups of coffee, energy drinks (Monster, Red Bull), tea, and more. Includes animated drink visualizations and a danger zone meter.

Use the 500 or 450 rule to find how many grams of carbohydrate one unit of insulin covers, compare the two rules, see the units needed for common foods, and estimate a mealtime bolus from your total daily insulin dose.

Enter your age, weight, height, activity level, and diet goals to calculate your daily carbohydrate intake, fiber target, and AHA added sugar limit.

Calculate your child's BMI and CDC BMI-for-age percentile for ages 2 to 20. Enter sex, age, height and weight to see the exact percentile on the CDC growth chart, the weight-status category and the healthy weight range.

Predict your child's adult height from the parents' heights with the mid-parental method. See the prediction and its 95% range on a height ruler, compare the child with each parent, and find the adult-height percentile it lands in.

Compare the alertness boost from coffee versus a power nap. See peak alertness timing, caffeine crash window, and which option gives you better sustained focus based on sleep science and caffeine pharmacokinetics.

Enter your baby's weight and age to find the right diaper fit, track daily or monthly usage, and project when to transition to the next size.

Find out how much weight you should lose based on BMI analysis, get a safe weight loss timeline, calorie deficit plan, and personalized milestones to reach your healthy weight range.

Use the 1500, 1700, 1800 or 2000 rule to find how much one unit of insulin lowers your blood glucose, compare the rules side by side, and estimate a correction dose in mg/dL or mmol/L from your total daily dose.

Choose 16:8, 18:6, 20:4, OMAD, or custom hours. See the fasting and eating windows and a body-process timeline.

Estimate jet lag recovery time from origin and destination time zones, travel direction, and flight time. Get personalized sleep, light exposure, meal timing, and arrival-day adjustment tips.

Calculate your personalized keto macros for fat, protein, and net carbs. Get daily calorie targets, macro ratios, and meal planning insights tailored to your body composition, activity level, and ketosis goals.

Enter age, gender, and habits such as smoking, exercise, diet, sleep, and stress. See an estimated lifespan and how those factors move it.

Enter your age, gender, height, weight, activity level, and fitness goal to calculate your daily target grams for protein, carbohydrates, and fat.

Calculate medication dosage three ways: by body weight in mg/kg, by age with Clark's, Young's and Fried's rules, or by body surface area with the Mosteller formula. Includes mg-to-ml conversion and a max-daily-dose safety check.

Find the perfect nap length and the exact alarm time so you wake refreshed, not groggy. Maps your nap onto real sleep stages with a hypnogram marking the grogginess zone, and works from either your lie-down time or your wake-up time.

Compute net carbs by subtracting dietary fiber and sugar alcohols from total carbohydrates. Supports different sugar alcohol types with accurate glycemic impact factors, daily keto budget tracking, and a visual carb waterfall breakdown.

Calculate the total calories, protein, fat, carbohydrates, and fiber from your recipe's ingredient list. Get per-serving nutrition facts, a macro breakdown chart, and daily value percentages.

Calculate optimal sleep and wake times based on 90-minute sleep cycles. Get personalized recommendations for your age group and track sleep debt.

Enter a drink's volume and ABV to convert it into US, UK, Australian, Canadian, or WHO standard drinks, plus grams of alcohol and calories.

Enter body weight, activity level, and climate for a daily water estimate, a glass count, and an hourly drinking schedule.