TDEE Calculator
Total daily energy expenditure with activity level and BMR
BMR Calculator
Basal metabolic rate with Mifflin-St Jeor formula for metric and imperial
Body Fat Calculator
Body fat percentage with US Navy circumference method
Ideal Weight Calculator
Ideal weight range by height, age, gender, and body frame
Calories Burned Calculator
Calories burned by activity using MET values, weight, and duration
Sleep Cycle Calculator
Optimal bedtimes and wake times based on 90-minute sleep cycles
Pace Calculator
Running pace, speed, and finish time from distance and duration
Target Heart Rate Calculator
Heart rate zones with the Karvonen formula and max heart rate
Lean Body Mass Calculator
Lean body mass and body fat estimate with the Boer formula
One-Rep Max Calculator
Estimated 1RM with the Epley formula and strength levels
VO2 Max Calculator
VO2 max estimate with the Rockport walk test and fitness rating
DOTS Calculator
Calculate your DOTS score for powerlifting — a bodyweight-adjusted total that lets you compare lifting strength fairly across weight classes.
FTP Calculator
Estimate your Functional Threshold Power from a 20-minute or 60-minute all-out test. Get watts per kilo and training zones.
RPE Calculator
Convert Rating of Perceived Exertion between the Borg CR10 and 6-20 scales. Estimate exercise intensity, heart rate, and effort level.
Rucking Calorie Calculator
Estimate calories burned while rucking — weighted pack walking. Enter bodyweight, pack weight, pace, and duration for a MET-based calorie estimate.
Swim Pace Calculator
Calculate swimming pace per 100m or 100yd from a swim distance and time. Predict split times for 500m, 1000m, 1500m and more.
Due Date Calculator
Pregnancy due date with LMP date and cycle length adjustment
Ovulation Calculator
Ovulation date, fertile window and due date if conceived
A1C Calculator
Estimate your A1C from average blood glucose, or convert A1C to estimated average glucose (eAG) in mg/dL and mmol/L.
Anion Gap Calculator
Calculate the anion gap from sodium, chloride, and bicarbonate. Includes albumin-corrected anion gap and reference ranges.
ASCVD Risk Calculator
Estimate your 10-year risk of atherosclerotic cardiovascular disease using the ACC/AHA Pooled Cohort Equations.
Baby Eye Color Calculator
Predict your baby's eye color probability from both parents' eye colors using a simplified genetics model.
BAC Calculator - Blood Alcohol Content
Estimate your blood alcohol concentration (BAC) from drinks consumed, body weight and drinking time using the Widmark formula. See when you'll be back to 0.00%.
Blood Pressure Calculator - BP Categories & MAP
Enter systolic and diastolic readings to get your blood pressure category (normal, elevated, stage 1/2, crisis), plus mean arterial pressure (MAP) and pulse pressure.
Blood Type Calculator - Baby Blood Type Predictor
Predict your baby's possible blood types (ABO + Rh) from the parents' blood types using Mendelian inheritance, with probability percentages.
CHA2DS2-VASc Score Calculator
Calculate the CHA2DS2-VASc stroke risk score for atrial fibrillation patients, with 1-year stroke risk estimates used to guide anticoagulation decisions.
Conception Date Calculator
Estimate conception date, ovulation window, due date and current pregnancy week from last menstrual period, due date or conception date.
Creatinine Clearance Calculator (Cockcroft-Gault)
Estimate creatinine clearance (CrCl) with the Cockcroft-Gault equation from age, weight, sex and serum creatinine. Commonly used for drug dose adjustment.
Dental Implant Cost Calculator
Estimate total dental implant costs per tooth and for full treatment plans — implant, abutment, crown, bone graft, anesthesia and follow-up visits, with insurance and discount options.
eGFR Calculator - CKD-EPI 2021
Estimate your glomerular filtration rate (eGFR) with the CKD-EPI 2021 equation, see your CKD stage and which tests may come next.
FFMI Calculator - Fat-Free Mass Index
Calculate your fat-free mass index (FFMI) and normalized FFMI from height, weight and body fat percentage. See how your muscle mass compares to natural limits.
Height Calculator - Convert & Predict Child Height
Convert height between cm, meters, feet and inches, and predict a child's adult height from parents' heights using the mid-parental height method.
Invisalign Price Calculator
Estimate Invisalign treatment cost from case complexity, location and insurance coverage. See low/typical/high price ranges and monthly payment plans.
Life Expectancy Calculator
Estimate your life expectancy from your age, sex, region and lifestyle factors like smoking, exercise, diet, BMI and stress. See how habits shift the clock.
MAP Calculator - Mean Arterial Pressure
Calculate mean arterial pressure (MAP) from systolic and diastolic blood pressure. See organ perfusion status and target range for ICU and daily health tracking.
Odds of Having Twins Calculator
Estimate your chances of conceiving twins based on age, family history, previous multiples, IVF, BMI, ethnicity and fertility treatment.
Peptide Calculator - Molecular Weight
Calculate peptide molecular weight from a one-letter amino acid sequence, with residue composition, length and net charge estimate.
Pregnancy Week Calculator
Track your pregnancy week by week from your last period or due date. See trimester, progress percentage, days to go and baby's fruit-sized comparison.
Prescription Refill Calculator
Calculate when your prescription will run out and when to refill, from pill count, daily dose and supply on hand. Estimate monthly usage and cost.
QTc Calculator - Corrected QT Interval
Calculate corrected QT interval (QTc) with Bazett, Fridericia and Framingham formulas from QT interval and heart rate. Check long QT risk categories.
Sleep Debt Calculator
Track your sleep debt over the last week. Enter actual hours slept each night, compare against your target, and see how many nights you need to catch up.
Waist to Height Ratio Calculator (WHtR)
Calculate your waist-to-height ratio (WHtR) to assess abdominal fat risk. The simple rule: keep your waist below half your height.