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Find the right calculator for every task

Health Calculators

85 calculators for body metrics, nutrition, heart rate, strength, and activity

6 Minute Walk Test Calculator

Estimate VO₂ max from 6MWT distance using the Enright equation.

Adult BMI Calculator

Calculate adult body mass index and a healthy weight range.

ANC Calculator

Calculate absolute neutrophil count from WBC and differential percentages.

Biological Age Calculator

Estimate lifestyle-adjusted biological age from habits and body metrics.

BMR Calculator

Estimate your basal metabolic rate.

Body Fat Calculator

Estimate body fat percentage from height, weight, age, and sex.

Calories Calculator

Estimate daily calories for weight loss, maintenance, or gain.

Child BMI Calculator

Calculate BMI-for-age percentile for children and teens.

Child-Pugh Score Calculator

Score cirrhosis severity from bilirubin, albumin, INR, ascites, and encephalopathy.

hCG Calculator

Calculate hCG doubling time or view typical levels by gestational week.

Ideal Weight Calculator

Estimate a healthy weight range for your height.

IV Drip Rate Calculator

Calculate IV drip rate in gtt/min and mL/hr from volume and time.

LDL Cholesterol Calculator

Estimate LDL cholesterol with the Friedewald equation from lipid panel.

Macro Calculator

Split daily calories into protein, carbs, and fat targets.

MAP Calculator

Calculate mean arterial pressure from systolic and diastolic blood pressure.

One Rep Max Calculator

Estimate your 1RM from weight and reps using common strength formulas.

Ovulation Calculator

Estimate ovulation date and fertile window from last menstrual period.

Pregnancy Calculator

Estimate due date, gestational age, and trimester dates.

Protein Intake Calculator

Estimate daily protein needs for your weight and goal.

Running Pace Calculator

Convert running distance and time into pace per mile or kilometer.

Sleep Calculator

Plan bedtimes and wake-up times using sleep cycles.

Target Heart Rate Calculator

Find training heart-rate zones using age and optional resting heart rate.

TDEE Calculator

Estimate total daily energy expenditure from BMR and activity level.

Walking Calorie Calculator

Estimate calories burned walking by pace, duration, and body weight.

Weight Loss Calculator

Plan daily calories and timeline to reach a goal weight safely.

ACFT Score Calculator

Estimate U.S. Army ACFT event scores and total points from your results.

ALC Calculator

Calculate absolute lymphocyte count from WBC and lymphocyte percentage.

Allele Frequency Calculator

Calculate allele frequencies and Hardy-Weinberg proportions from genotype counts.

AST/ALT Ratio Calculator

Compute the AST to ALT ratio (De Ritis ratio) from liver enzymes.

Bench Press Calculator

Compare your bench press to common strength standards by body weight.

Bishop Score Calculator

Score cervical readiness for labor induction using Bishop components.

Body Shape Calculator

Classify body shape from bust, waist, and hip measurements.

Bra Size Calculator

Estimate US, UK, and EU bra sizes from underbust and bust measurements.

Breastfeeding Calorie Calculator

Estimate extra daily calories for nursing mothers.

Bulking Calculator

Set a lean or moderate bulk calorie surplus from your TDEE.

BUN/Creatinine Ratio Calculator

Calculate BUN to creatinine ratio for renal assessment context.

Calorie Deficit Calculator

Find the daily deficit needed for your target weekly weight loss.

Carboplatin Dose Calculator

Calculate carboplatin dose with the Calvert formula from AUC and GFR.

Child Height Predictor

Predict adult height range from parental heights using the mid-parental method.

Cholesterol Ratio Calculator

Compute total/HDL and optional LDL/HDL cholesterol ratios.

Corrected Calcium Calculator

Adjust total calcium for albumin using the standard correction formula.

Cycling Calorie Calculator

Estimate calories burned cycling by duration, speed, and body weight.

Dihybrid Cross Calculator

Show phenotype ratios for an AaBb × AaBb dihybrid cross.

Dosage Calculator

Convert mg/kg prescribing to total daily and per-dose amounts by body weight.

Elliptical Calorie Calculator

Estimate calories burned on an elliptical trainer by effort and duration.

Fat-Burning Heart Rate Calculator

Find a fat-burning heart-rate range based on age and resting heart rate.

FFMI Calculator

Calculate fat-free mass index (FFMI) from weight, height, and body fat.

Food Cost Calculator

Break down meal or grocery costs per day, week, and month.

Grams to Calories Calculator

Convert grams of protein, carbs, and fat into total calories.

Height Comparison Calculator

Compare two heights side by side and see the difference in cm, feet, and inches.

Implantation Calculator

Estimate implantation window from ovulation or LMP.

Incidence Rate Calculator

Calculate incidence rate per 1,000 person-years from cases and population time.

IPPT Score Calculator

Estimate Singapore IPPT points from push-ups, sit-ups, and 2.4 km run time.

Jump Rope Calorie Calculator

Estimate calories burned jumping rope based on duration and intensity.

Lean Body Mass Calculator

Estimate lean body mass using the Boer formula or body fat percentage.

Maintenance Calorie Calculator

Find calories to maintain your current weight at your activity level.

Max Heart Rate Calculator

Estimate maximum heart rate using common age-based formulas.

Meal Calorie Calculator

Add up calories from protein, carbs, and fat in a meal.

Melatonin Dosage Calculator

Age-based melatonin dosing ranges for sleep support.

Net Carbs Calculator

Calculate net carbs by subtracting fiber and sugar alcohols.

Paracetamol Dosage Calculator

Weight-based paracetamol (acetaminophen) single-dose estimate in mg.

Pediatric Amoxicillin Dosage Calculator

Calculate amoxicillin mg per dose from weight and mg/kg/day regimen.

Pediatric Dosage Calculator

Estimate pediatric medicine doses by mg/kg or Clark weight proportion.

Pregnancy Weight Gain Calculator

IOM total weight gain recommendations by pre-pregnancy BMI.

Prostate Volume Calculator

Estimate prostate volume from ultrasound dimensions using the ellipsoid formula.

Reticulocyte Production Index Calculator

Compute RPI from reticulocyte count and hematocrit with maturation correction.

RMR Calculator

Estimate resting metabolic rate using the Mifflin-St Jeor equation.

Rucking Calorie Calculator

Estimate calories burned rucking with pack weight, distance, and pace.

Steps to Calories Calculator

Estimate calories burned from step count, body weight, and walking pace.

Steps to Miles Calculator

Convert daily steps into miles or kilometers using stride length.

Stroke Volume Calculator

Calculate stroke volume from cardiac output and heart rate or EDV/ESV.

SVR Calculator

Estimate systemic vascular resistance from MAP, CVP, and cardiac output.

Swimming Calorie Calculator

Estimate calories burned swimming by stroke, duration, and body weight.

Tinetti Score Calculator

Sum balance and gait scores for fall-risk interpretation.

Treadmill Calorie Calculator

Estimate treadmill calories from speed, incline, duration, and body weight.

Urine Output Calculator

Calculate urine output in mL/kg/hr for acute care monitoring.

US Navy Body Fat Calculator

Estimate body fat using the U.S. Navy circumference method.

VO2 Max Calculator

Estimate VO2 max from a Cooper 12-minute run or 1.5-mile test result.

Waist-to-Height Ratio Calculator

Find your waist-to-height ratio (WHtR) and what it may suggest about central adiposity.

Waist-to-Hip Ratio Calculator

Calculate waist-to-hip ratio and see common health risk categories.

Water Intake Calculator

Estimate daily water needs from body weight and activity.

Weight Gain Calculator

Plan calorie surplus and timeline for healthy weight gain.

Weight Loss Percentage Calculator

Find how much body weight you have lost as a percentage.

Weight Watchers Points Calculator

Estimate SmartPoints for a food from calories and saturated fat.

Wilks Score Calculator

Calculate Wilks score for powerlifting totals relative to body weight.