Health and Fitness
Fertility Calculators
Conception Date Calculator - Calculate your estimated conception date, fertile window, and due date based on your last menstrual period. Get a detailed pregnancy timeline with week-by-week milestones and ovulation tracking.
Fertility Calculator - Calculate your most fertile days, predict ovulation dates, and track your menstrual cycle with our comprehensive fertility calculator. Get personalized fertility windows and estimated due dates.
Menstrual Cycle Calculator - Predict your future menstrual cycles, track fertility windows, and estimate ovulation dates with our comprehensive cycle calculator featuring visual phase timelines.
Menstrual Cycle Length Calculator - Calculate your menstrual cycle length, predict your next period, estimate fertile window and ovulation day based on your last two period start dates.
Ovulation Calculator - Free ovulation calculator and fertility calendar to find your most fertile days, predict ovulation date, and estimate due date if pregnant. Plan conception with visual cycle tracking.
Ovulation Calendar - Create your personal ovulation calendar to track fertile days, predict ovulation, and plan pregnancy with our beautiful visual fertility tracker.
Ovulation Predictor - Predict your ovulation date and most fertile days with a visual fertility calendar, cycle phase breakdown, and 6-cycle forecast based on your menstrual cycle data.
Fitness Calculators
Bench Press Calculator - Calculate your one-rep maximum (1RM) for bench press using Brzycki, Epley, or Lander formulas. Get personalized training zones, percentage charts, and strength level assessment.
BMR Calculator - Calculate your BMR (basal metabolic rate) and daily calorie needs with the Mifflin-St Jeor and Harris-Benedict equations. Includes TDEE, activity-level breakdown, macronutrient estimates, and step-by-step formula walkthrough.
Body Fat Percentage Calculator - Calculate your body fat percentage using the US Navy Method with visual body composition breakdown, fitness category assessment, and personalized health recommendations.
Calorie Burned Calculator - Calculate calories burned during 50+ activities with MET values, personalized insights, food equivalents, and interactive visualization. Supports metric and imperial units.
Calorie Deficit Calculator - Calculate your personalized calorie deficit, TDEE, and BMR to create an effective weight loss plan with meal suggestions and progress tracking.
Max Heart Rate Calculator - Calculate your maximum heart rate using 6 scientifically-validated formulas including Tanaka, Gulati, and traditional methods. Get personalized training zones for optimal workout intensity.
One Rep Max (1RM) Calculator - Calculate your one-rep maximum (1RM) using 7 scientific formulas. Get training zone percentages, warm-up sets, and visualize your strength potential for any exercise. Featured
Running Pace Calculator - Calculate your running pace, finish time, or distance. Features pace zone classification, speed conversion, projected race times, and training tips for 5K, 10K, Half Marathon, Marathon, and Ultra distances.
Target Heart Rate Calculator - Calculate your target heart rate zones using the Karvonen method. Find your optimal training zones for fat burning, cardio, and peak performance with personalized heart rate targets.
TDEE Calculator - Calculate your TDEE, BMR, BMI with multiple formulas (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle). Get personalized macro recommendations and visualize your calorie breakdown.
VO2 Max Calculator - Calculate your VO2 Max using the Cooper 12-minute run test. Get personalized fitness assessment, training recommendations, and compare your cardiovascular fitness to age and gender norms.
Health Calculators
Blood Donation Time Calculator - 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. Featured
Blood Sugar Converter - 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.
Caffeine Overdose Calculator - 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. New
Coffee vs. Sleep Calculator - 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. New
How Much Water to Drink A Day? - Calculate your personalized daily water intake based on weight, activity level, climate, and health factors. Get a visual hydration plan with hourly schedule and tips.
How Much Weight Should I Lose? - 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.
Macro Calculator - Calculate Your Daily Macros for Any Goal - Calculate your optimal daily macronutrient needs with our advanced macro calculator. Get personalized protein, carbs, and fat targets based on your body, activity level, and fitness goals.
Sleep Calculator - Calculate optimal sleep and wake times based on 90-minute sleep cycles. Get personalized recommendations for your age group and track sleep debt.
Water Intake Calculator - Calculate your personalized daily water intake based on body weight, activity level, and climate. Get a visual glass tracker and hourly drinking schedule.
Health Indicator Calculators
Am I Overweight? - Calculate your BMI (Body Mass Index) to find out if you are underweight, normal weight, overweight, or obese. Get personalized health insights, ideal weight range, and step-by-step calculation.
Am I Underweight? - Find out if you are underweight based on BMI calculation with visual health indicators, personalized insights, and actionable recommendations.
BMI Calculator - Calculate your BMI (Body Mass Index) with interactive gauge visualization, health category assessment, BMI Prime, healthy weight range, and step-by-step calculation breakdown.
How Much Should I Weigh? - Calculate your ideal body weight using 5 scientific formulas (Devine, Robinson, Miller, Hamwi, Peterson). Compare results with a visual weight spectrum, BMI analysis, body frame adjustment, and personalized health insights.
Waist to Hip Ratio Calculator - Calculate your waist-to-hip ratio (WHR) to assess body fat distribution, health risks, and body shape type. Get personalized health insights with visual body shape analysis.
What Should I Weigh? - Find out what you should weigh based on your height using BMI guidelines. See your healthy weight range with a visual BMI spectrum, weight zone breakdown, and personalized health insights for adults.
WHtR Calculator - Calculate your waist-to-height ratio (WHtR) to assess body fat distribution and health risks. Includes visual gauge, health zone charts, and body shape indicators.
Medical Calculators
ANC Calculator - Calculate the Absolute Neutrophil Count (ANC) from CBC lab values with visual gauge, NCI toxicity grading, step-by-step calculation breakdown, and clinical interpretation for neutropenia assessment.
BSA Calculator - Calculate body surface area (BSA) using 5 medical formulas including Du Bois, Mosteller, Haycock, Gehan-George, and Boyd. Features step-by-step calculations, formula comparison, and drug dosing applications.
BUN to Creatinine Ratio Calculator - Calculate your BUN to creatinine ratio with instant clinical interpretation, visual kidney health indicators, and comprehensive analysis of what your results mean for kidney function.
FENa Calculator - Calculate the Fractional Excretion of Sodium (FENa) with step-by-step formula breakdown, clinical interpretation, and visual diagnosis guide for acute kidney injury assessment.
HbA1c Calculator - Calculate and convert between HbA1c percentage and average blood glucose levels in mg/dL or mmol/L. Essential tool for diabetes management and monitoring.
Pregnancy Calculators
Due Date Calculator - Calculate your pregnancy due date based on last menstrual period or conception date. Get a complete pregnancy timeline with trimester milestones, week-by-week development, and important dates.
How Many Weeks Pregnant Am I? - Calculate how many weeks pregnant you are based on your due date, last menstrual period (LMP), or conception date. Includes trimester progress, baby size comparison, and weekly milestones.
Pregnancy Calendar - Create your personalized pregnancy calendar with week-by-week development milestones, trimester breakdown, baby size comparisons, key appointment reminders, and due date countdown.
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