Hong Life CalculatorsAll health & fitness tools
Body composition
- Asian BMI Calculator (WHO Asia-Pacific cut-offs)
- Ideal Body Weight Calculator (Devine, Robinson, Miller, Hamwi, Broca, Lorentz)
- Waist-to-Height & Waist-to-Hip Ratio Calculator
- Body Fat Calculator (US Navy method)
- Body Fat Estimate from BMI (Deurenberg)
- Skinfold Body Fat Calculator (Jackson-Pollock 3-site)
- Lean Body Mass Calculator (Boer, James, Hume)
- Fat-Free Mass Index (FFMI) Calculator
- Body Surface Area Calculator (Mosteller, DuBois, Haycock, Boyd)
- Ponderal Index, Rohrer & Kaup Index Calculator
- Body Frame Size Calculator (wrist)
- Natural Muscular Potential Calculator (Casey Butt & Berkhan)
- Golden Ratio Physique Calculator (shoulder-to-waist)
- Height from Foot Length Estimator
- Child’s Adult Height Predictor (mid-parental)
- Sit-and-Reach Flexibility Rating Calculator
- Waist Circumference Risk Calculator
- Bone Density T-Score Interpreter
- Frailty Phenotype Calculator (Fried criteria)
- Scoliosis Cobb Angle Interpreter
- Forward Head Posture (CVA) Calculator
- Predicted Lung Capacity (FEV1, FVC) Calculator
- Sleep Apnea Risk (STOP-BANG) Calculator
- Body Shape Calculator (FFIT shapes from bust, waist & hips)
- Weight Loss Percentage Calculator (% of starting weight lost)
- BAI Calculator (Body Adiposity Index from hip and height)
- BRI Calculator (Body Roundness Index from waist and height)
- RFM Calculator (Relative Fat Mass from height and waist)
- Bedridden Patient Height Calculator (estimate height from knee height)
Calories & nutrition
- BMR Calculator (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, Cunningham, Oxford, Schofield)
- TDEE Calculator (total daily energy expenditure)
- NEAT Calculator (steps & daily movement)
- Exercise Calories Calculator (METs)
- Thermic Effect of Food (TEF) Calculator
- Weight Loss Calorie Deficit Calculator
- Lean Bulk Calorie Calculator
- Diet Plateau (Metabolic Adaptation) Estimator
- Refeed Day Calculator
- Cheat Day Fat Gain Calculator
- Macro Calculator (4:4:2, 5:3:2, keto, low-fat, zone)
- Protein Intake Calculator (per kg)
- Healthy Fat Intake Calculator (min fat & saturated fat cap)
- Omega-3 (EPA + DHA) Intake Calculator
- Net Carbs Calculator
- Carb Loading Calculator (marathon)
- Fibre Intake Calculator (14 g per 1,000 kcal)
- Sodium ⇄ Salt Converter
- Potassium-to-Sodium Ratio Calculator
- Calcium Intake Calculator
- Magnesium Intake & Elemental Content Calculator
- Vitamin D IU ⇄ mcg Converter
- Vitamin C Intake Calculator
- Creatine Dose Calculator (loading & maintenance)
- Caffeine Dose & Sleep Cut-off Calculator
- Daily Water Intake Calculator
- Sweat Rate & Hydration Calculator
- Alcohol Calories & Elimination Time Calculator
- Food Calories from Macros (Atwater) Calculator
- Cooking Method Calorie Change Calculator
- Dietary Acid Load (PRAL) Calculator
- Ultra-Processed Food Share Calculator
- HOMA-IR & QUICKI Insulin Resistance Calculator
- Cholesterol Calculator (Friedewald LDL, non-HDL, TG/HDL, AIP)
- eGFR Calculator (CKD-EPI 2021)
- Creatinine Clearance (Cockcroft-Gault) Calculator
- AST/ALT (De Ritis) Ratio Calculator
- HbA1c ⇄ Average Glucose (eAG) Converter
- Coffee Kick Calculator (caffeine left in your body over the day)
- Added Sugar Intake Calculator (vs WHO and AHA limits)
- Healthy Coffee Calculator (calories and sugar of milk, cream, sugar and syrup)
- Vitamin A Calculator (IU to mcg RAE, RDA and upper limit)
- DIY Sports Drink Calculator (sugar and salt for a homemade electrolyte drink)
- Triathlon Nutrition Calculator (carbohydrate and fluid per hour on race day)
- Fish Mercury Calculator (weekly mercury intake vs EPA reference dose)
- Weight Loss Goal Date Calculator (diet D-day from your calorie deficit)
Strength training
- 1RM Calculator (Epley, Brzycki, Lombardi, Mayhew, O’Conner, Wathan, Lander)
- 1RM Percentage Chart (weights for 1–12 reps)
- How Many Reps Can I Do? (from 1RM)
- Wilks Score Calculator (powerlifting)
- DOTS Score Calculator (powerlifting)
- IPF GL Points Calculator (Goodlift)
- Sinclair Calculator (Olympic weightlifting)
- Barbell Plate Loading Calculator
- RPE / RIR Calculator (estimated 1RM & load)
- 5/3/1 Calculator (Wendler program)
- Training Volume (Tonnage) Calculator
- Weekly Sets per Muscle (hypertrophy volume)
- Time Under Tension (tempo) Calculator
- Relative Strength (bodyweight multiple) Calculator
- Progressive Overload Planner
Cardio & running
- Heart Rate Zone Calculator (Karvonen)
- Maximum Heart Rate Calculator (5 formulas)
- MAF 180 Heart Rate Calculator (Maffetone)
- VO2 Max Calculator (Cooper 12-minute run)
- VO2 Max from Resting Heart Rate (Uth)
- Rockport 1-Mile Walk Test VO2 Max Calculator
- VO2 Max from 1.5-Mile Run Time
- Running Pace Calculator (pace, speed, time)
- Race Time Predictor (Riegel formula)
- VDOT Calculator (Jack Daniels) with Equivalent Race Times
- Pace Converter (min/km ⇄ min/mile ⇄ km/h)
- Running Calories Calculator (per km)
- Treadmill Calories Calculator (ACSM equations, incline)
- Steps to Distance & Calories Calculator
- Cycling FTP & Power Zones Calculator (Coggan)
- Training Stress Score (TSS) Calculator
- TRIMP Training Load Calculator (Banister)
- Heart Rate Recovery Calculator
- Swim Pace & Critical Swim Speed (CSS) Calculator
- Rowing 500 m Split ⇄ Watts Calculator (Concept2)
- Hiking Time Calculator (Naismith & Tobler)
- Reaction Time Calculator (ruler-drop test)
- Calories Burned by Heart Rate Calculator (Keytel formula)
- 6-Minute Walk Test Calculator (predicted distance and % predicted, Enright 1998)
- Biking Life Gain Calculator (WHO HEAT mortality benefit of cycling)
- Steps to Calories Calculator (calories burned walking & food equivalent)
Clinical scores
- CHA₂DS₂-VASc Score Calculator (atrial fibrillation stroke risk)
- HAS-BLED Bleeding Risk Calculator
- Wells Score for DVT Calculator
- Wells Score for Pulmonary Embolism Calculator
- PERC Rule for Pulmonary Embolism
- CURB-65 Pneumonia Severity Calculator
- qSOFA Score Calculator (sepsis)
- Glasgow Coma Scale (GCS) Calculator
- APGAR Score Calculator (newborn)
- Centor / McIsaac Score Calculator (sore throat)
- HEART Score Calculator (chest pain)
- Duke Treadmill Score Calculator
- Alvarado Score Calculator (appendicitis)
- Child-Pugh Score Calculator (cirrhosis)
- MELD & MELD-Na Calculator
- FIB-4 Liver Fibrosis Calculator
- APRI (AST to Platelet Ratio Index) Calculator
- Anion Gap Calculator (with albumin correction)
- Corrected Calcium Calculator (albumin)
- Corrected Sodium for Hyperglycaemia Calculator
- Serum Osmolality & Osmolal Gap Calculator
- Free Water Deficit Calculator (hypernatraemia)
- Fractional Excretion of Sodium (FENa) Calculator
- A-a Gradient & P/F Ratio Calculator
- Mean Arterial Pressure (MAP) & Pulse Pressure Calculator
- Blood Pressure Category Calculator (ACC/AHA & ESC)
- QTc Calculator (Bazett, Fridericia, Framingham, Hodges)
- Ankle-Brachial Index (ABI) Calculator
- Bishop Score Calculator (labour induction)
- AUDIT-C Alcohol Screening Calculator
- PHQ-9 Depression Screening Score
- GAD-7 Anxiety Screening Score
- Smoking Pack-Years Calculator
- CVD Risk Calculator (Framingham 10-year cardiovascular risk, 2008)
- Framingham Risk Calculator (10-year heart attack risk, ATP III points)
- Diabetes Risk Calculator (FINDRISC type 2 diabetes score)
- Drug Half-Life Calculator (share left in the body after a given time)
- Prescription Refill Calculator (run-out date & earliest refill)
- Osteoporosis Risk Calculator (OST / OSTA index from age & weight)
- Metabolic Syndrome Calculator (5 criteria, harmonized definition)
- EPDS Calculator (Edinburgh Postnatal Depression Scale score)
- Peak Flow Calculator (predicted PEF and asthma zones)
- Medical Radiation Dose Calculator (X-ray & CT effective dose in mSv)
- DUDIT Calculator (Drug Use Disorders Identification Test score)
- Diabetic Ketoacidosis Calculator (DKA criteria and severity, 2024 consensus)
- BIMS Calculator (Brief Interview for Mental Status, MDS 3.0)
- Morse Fall Scale Calculator (fall risk score for patients)
- Gout Diagnosis Calculator (2015 ACR/EULAR gout classification criteria)
- SAAG Calculator (serum-ascites albumin gradient)
- Aldrete Score Calculator (modified post-anaesthesia recovery score)
- BASDAI Score Calculator (ankylosing spondylitis disease activity)
- Beighton Score Calculator (joint hypermobility, 9 points)
- Berg Balance Scale Calculator (14-item balance test score)
- DASI Calculator (Duke Activity Status Index, estimated METs and VO₂)
- EASI Score Calculator (Eczema Area and Severity Index)
- Free Testosterone Calculator (Vermeulen equation from total T, SHBG and albumin)
- Noise Exposure Time Calculator (safe hours per day by dBA, NIOSH and OSHA)
- Time of Death Calculator (Henssge body-cooling equation, educational)
- Oxygen Tank Duration Calculator (D, E, M, G, H cylinders; psi or bar)
- SCORAD Calculator (SCORing Atopic Dermatitis index)
- Visual Acuity Converter (Snellen 20/20 and 6/6, decimal and logMAR)
Sleep
- Weighted Blanket Calculator (about 10% of body weight)
- Sleep Debt Calculator (hours of sleep you are short)
- Sleep Calculator (bedtime & wake-up time in 90-minute cycles)
Smoking
- Quit Smoking Savings Calculator (money saved since you quit)
- Cigarette Cost Calculator (smoking costs per year and over a lifetime)
- Fagerström Test for Nicotine Dependence (FTND score)
- Smoking Recovery Calculator (health timeline after you quit)
- HSI Calculator (Heaviness of Smoking Index, 0–6)
Ergonomics
Skin & sun
- Sunscreen Calculator (how much to apply and when to reapply)
- Sunbathing Calculator (time to sunburn from UV index and skin type)
Alcohol
- Alcohol Unit Calculator (weekly units vs the 14-unit guideline)
- Sobriety Calculator (alcohol-free days, money saved, milestones)
- AUDIT Score Calculator (WHO Alcohol Use Disorders Identification Test)
- CIWA-Ar Calculator (alcohol withdrawal severity score)
- Alcohol Spending Calculator (yearly drinking cost & alcohol calories)
- Quit Drinking Savings Calculator (money, alcohol & time saved since you stopped)
- Blood Alcohol (BAC) Calculator (Widmark estimate)
Women’s health
- Birth Control Pill Calculator (pack schedule, pill-free week, backup days)
- Breastfeeding Calorie Calculator (daily energy need, DRI 2023)
- Conception Calculator (conception date from due date or birthday)
- Fertility by Age Calculator (chance of getting pregnant by age)
- Implantation Calculator (when implantation happens after ovulation)
- Pregnancy Test Calculator (when to take a home pregnancy test)
- Pregnancy Weight Gain Calculator (IOM guidelines by BMI and week)
- hCG Levels Calculator (48-hour rise and doubling time)
- Crown-Rump Length Calculator (CRL to gestational age and due date)
- Fundal Height Calculator (cm vs weeks of pregnancy, ±2 cm rule)
- Luteal Phase Calculator (luteal phase length from ovulation and next period)
- MCA Calculator (middle cerebral artery PSV in MoM for fetal anaemia)
- Mean Sac Diameter Calculator (MSD to gestational age, early pregnancy)
- Pearl Index Calculator (contraceptive failure rate per 100 woman-years)
- Sperm Analysis Calculator (semen results vs WHO 2021 reference limits)
- Pregnancy VTE Risk Score Calculator (RCOG Green-top 37a, 2015)
- Period Calculator (next period, ovulation & fertile window)
Genetics & blood
- ANC Calculator (absolute neutrophil count and neutropenia grade)
- Blood Donation Due Date Calculator (when can I donate again — Korea & US)
- Blood Volume Calculator (Nadler formula)
- 4Ts Score Calculator (heparin-induced thrombocytopenia pretest probability)
- Absolute Eosinophil Count Calculator (AEC from WBC and eosinophil %)
- Absolute Lymphocyte Count Calculator (ALC from WBC and lymphocyte %)
- Reticulocyte Count Calculator (absolute, corrected count and RPI)
- Age-Adjusted D-dimer Calculator (age × 10 µg/L cut-off over 50)
- Albumin Globulin Ratio Calculator (A/G ratio and globulin from total protein)
- Allowable Blood Loss Calculator (MABL from blood volume and hematocrit)
- DIC Score Calculator (ISTH overt disseminated intravascular coagulation score)
- DLBCL IPI Calculator (International Prognostic Index for diffuse large B-cell lymphoma)
- Hematocrit to Hemoglobin Ratio Calculator (rule of three check)
- INR Calculator (from prothrombin time, mean normal PT and ISI)
- Mentzer Index Calculator (MCV ÷ RBC: thalassaemia trait vs iron deficiency)
- NLR Calculator (neutrophil-to-lymphocyte ratio)
- RBC Indices Calculator (MCV, MCH and MCHC from a blood count)
- Transferrin Saturation Calculator (TSAT from serum iron and TIBC)
- Blood Type Calculator (child’s possible ABO & Rh types)
Children & growth
- Adjusted Age Calculator for Premature Babies (corrected age)
- Baby Formula Calculator (how much formula per feed and per day)
- Baby’s Milk Intake Calculator (breast milk per day and per bottle)
- Birth Weight Percentile Calculator (by gestational age, 23–42 weeks)
- Height Percentile Calculator for Children & Teens (CDC, 2–20 years)
- Weight Percentile Calculator for Children & Teens (CDC, 2–20 years)
- Pediatric Blood Pressure Calculator (percentiles by age, sex and height, 2–17 years)
- Pediatric Blood Volume Calculator (mL/kg by age and allowable blood loss)
- Pediatric GFR Calculator (bedside Schwartz equation for children)
- Fetal Weight Percentile Calculator (ultrasound EFW, Hadlock 1991)
- Head Circumference Percentile Calculator (WHO, 0–5 years)
- BMI Calculator for Kids & Teens (CDC BMI-for-age percentile)
- Baby Growth Percentile Calculator (WHO, 0–24 months)
Blood gases & electrolytes
- Acid–Base Calculator (ABG pattern and expected compensation)
- Venous Blood pH Calculator (estimate arterial pH from a VBG)
- Sodium Correction for Hypertriglyceridemia (pseudohyponatremia)
- Total Body Water Calculator (Watson formula)
- Winters’ Formula Calculator (expected PaCO₂ in metabolic acidosis)
Critical care
- APACHE II Calculator (ICU severity score, Knaus 1985)
- ICH Score Calculator (intracerebral haemorrhage grading, Hemphill 2001)
- Injury Severity Score Calculator (ISS from AIS by body region)
- LRINEC Score Calculator (laboratory risk of necrotising fasciitis)
- MEWS Calculator (Modified Early Warning Score, Subbe 2001)
- NEDOCS Calculator (emergency department overcrowding score)
- NIH Stroke Scale Calculator (NIHSS total score)
- Revised Trauma Score Calculator (RTS and triage RTS)
- SAPS II Calculator (Simplified Acute Physiology Score, predicted ICU mortality)
- SOFA Score Calculator (Sequential Organ Failure Assessment)
- Sepsis-3 Calculator (sepsis and septic shock criteria from SOFA change)
- Shock Index Calculator (HR ÷ SBP, modified and age shock index)
Epidemiology
- Denver HIV Risk Score Calculator (targeted HIV testing score)
- Hand Sanitizer Calculator (WHO hand-rub formulations, any batch size)
- Incidence Rate Calculator (cases per person-time with exact 95% CI)
- Mortality Rate Calculator (death rate, case-fatality and proportionate mortality)
- NNT Calculator (number needed to treat or harm, with 95% CI)
- Vaccine Efficacy Calculator (VE from attack rates in vaccinated and unvaccinated groups)
Eyes & vision
Hair & personal care
Heart & circulation
- Aortic Valve Area Calculator (continuity equation, AS severity)
- Cardiac Index Calculator (cardiac output ÷ body surface area)
- Cardiac Output Calculator (heart rate × stroke volume)
- Cerebral Perfusion Pressure Calculator (CPP = MAP − ICP)
- DAPT Score Calculator (dual antiplatelet therapy beyond 1 year, Yeh 2016)
- Doppler Echo Cardiac Output Calculator (LVOT diameter × VTI × heart rate)
- ECG Boxes to Seconds Calculator (small and large boxes to ms)
- ECG Heart Rate Calculator (1500, 300 and 6-second methods)
- EROA Calculator for Mitral Regurgitation (PISA method, regurgitant volume)
- Ejection Fraction Calculator (LVEF from end-diastolic and end-systolic volume)
- Heart Failure Life Expectancy Calculator (MAGGIC 1- and 3-year survival score)
- ICH Volume Calculator (ABC/2 intracerebral haemorrhage volume from CT)
- LV Mass Calculator (left ventricular mass, index and geometry by echo, ASE 2015)
- Mitral Valve Area Calculator (pressure half-time, MVA = 220 ÷ PHT)
- Gorlin Formula Calculator (aortic and mitral valve area from catheterisation)
- PVR Calculator (pulmonary vascular resistance in Wood units and dyn·s·cm⁻⁵)
- Padua Score Calculator (VTE risk in hospitalised medical patients)
- RCRI Calculator (Lee Revised Cardiac Risk Index before non-cardiac surgery)
- Rate Pressure Product Calculator (double product, heart rate × systolic BP)
- Revised Geneva Score Calculator (clinical probability of pulmonary embolism)
- Stroke Volume Calculator (EDV − ESV, or cardiac output ÷ heart rate)
- TIMI Risk Score Calculator for Unstable Angina / NSTEMI (14-day risk)
- TIMI Risk Score Calculator for STEMI (30-day mortality, Morrow 2000)
Kidney & urology
- Adrenal Washout Calculator (absolute and relative CT washout)
- Albumin Creatinine Ratio Calculator (urine ACR, mg/g and mg/mmol, KDIGO A1–A3)
- BUN Creatinine Ratio Calculator (BUN:Cr, prerenal vs renal pattern)
- Bladder Volume Calculator (ultrasound length × width × height × coefficient)
- EORTC Bladder Cancer Calculator (recurrence & progression risk tables, Ta/T1)
- FEUrea Calculator (fractional excretion of urea, prerenal vs intrinsic AKI)
- Kidney Failure Risk Calculator (KFRE 4-variable, 2- and 5-year risk)
- STONE Score Calculator (S.T.O.N.E. nephrolithometry for PCNL)
- Kt/V Calculator (Daugirdas second-generation formula, hemodialysis adequacy)
- PSA Density Calculator (PSA ÷ prostate volume, 0.15 threshold)
- PSA Doubling Time Calculator (log-slope of two or more PSA results)
- Prostate Volume Calculator (ellipsoid formula from ultrasound or MRI)
- Protein Creatinine Ratio Calculator (UPCR, estimated 24-hour urine protein)
- TTKG Calculator (transtubular potassium gradient)
- URR Calculator (urea reduction ratio for hemodialysis)
- Urine Output Calculator (mL/kg/h, oliguria and KDIGO AKI criteria)
Liver & digestive
- CDAI Calculator (Crohn’s Disease Activity Index)
- Lille Score Calculator (steroid response in severe alcohol-related hepatitis)
- Maddrey’s Discriminant Function Calculator (alcohol-related hepatitis severity)
- NAFLD Fibrosis Score Calculator (fatty liver advanced fibrosis risk)
Lungs & breathing
- BODE Index Calculator (COPD prognosis: BMI, obstruction, dyspnea, exercise)
- Dead Space Calculator (Bohr–Enghoff Vd/Vt from PaCO₂ and expired CO₂)
- Endotracheal Tube Size Calculator (children 1–10 years, cuffed & uncuffed)
- Light’s Criteria Calculator (pleural effusion: exudate or transudate)
- Lung Cancer Risk Calculator (PLCOm2012 6-year risk for people who smoke or smoked)
- Lung Nodule Growth Rate Calculator (volume doubling time from two CT scans)
- Mean Airway Pressure Calculator (mPaw from PIP, PEEP, rate and inspiratory time)
- Oxygenation Index Calculator (OI and OSI with PALICC severity bands)
- Pneumonia Severity Index Calculator (PSI / PORT score, Fine 1997)
- Qp/Qs Calculator (shunt fraction from oxygen saturations, Fick method)
- RSBI Calculator (rapid shallow breathing index, f/VT for weaning)
- Tidal Volume Calculator (predicted body weight, 6 mL/kg ARDSNet reference)
Radiology
FAQ
Is this medical advice?
No — these are published formulas for information. Ask a doctor about your results.
Checked 8 Nov 2026.