Medical & Clinical
54 free medical & clinical tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.
Blood Alcohol Calculator (BAC)
Estimate blood alcohol concentration from drinks, body weight and time using the Widmark formula.
Aminoglycoside Extended-Interval Dosing Nomogram
Tobramycin and amikacin once-daily dosing from patient kidney function
APGAR Score Calculator
Neonatal assessment at 1, 5, and 10 minutes after birth
Aquarium Medication Dosing Calculator
Calculate medication dose for your exact aquarium volume
Blood Alcohol Concentration Estimator (Widmark)
Estimate BAC from drinks consumed, weight, and time elapsed
BUN:Creatinine Ratio Calculator
Classify azotaemia as pre-renal, intrinsic renal, or post-renal
Obesity Class & Drug Dosing Weight Selector
Pick the right dosing weight (ABW, IBW, AdjBW, LBW) by drug class
Braden Scale for Pressure Injury Risk
Six-domain pressure ulcer risk assessment for hospitalised patients
Carboplatin AUC Dose Calculator (Calvert Formula)
Oncology carboplatin dose from a target AUC and GFR
Corrected Gestational Age for Premature Infants
Compute developmental corrected age from birthdate and gestation
Corrected Calcium for Albumin
Adjust serum calcium when albumin is abnormal
CrCl-Based Renal Drug Dosing Interval Selector
Renal dose reduction guidance for common drugs
Paediatric GFR Estimator (Schwartz Formula)
Estimate GFR in children from height and serum creatinine
Creatinine Clearance (Cockcroft-Gault)
Estimate kidney function for drug dosing adjustments
Cystatin C-Based eGFR Calculator (CKD-EPI Cys)
GFR estimate using cystatin C alone or combined with creatinine
Creatinine Unit Converter (mg/dL to umol/L)
Convert serum creatinine between US and SI units
Drug Dose by BSA Calculator
Body surface area-based dosing for chemotherapy and specialty drugs
eGFR Calculator (CKD-EPI & MDRD)
Estimate GFR and CKD stage with two validated equations
Gentamicin Once-Daily Dosing Calculator
Hartmann nomogram-based extended-interval aminoglycoside dosing
GFR-Based CKD Staging Tool
Map any eGFR value to its KDIGO CKD G-stage
Heparin Weight-Based Dosing Protocol
Bolus and infusion rates for unfractionated heparin by weight
Mean Arterial Pressure (MAP) Calculator
Calculate MAP from systolic and diastolic blood pressure
Paediatric Normal Vital Signs Reference
Age-band heart rate, respiratory rate, and BP reference ranges
Pediatric Weight-Based Dosing Calculator
Safe peds drug doses with weight and max-dose guardrails
Pet Medication Weight-Based Dosing Calculator
Calculate medicine doses for dogs and cats by weight
Reef Calcium Dosing Calculator
Calculate daily calcium, alkalinity, and magnesium dosing for reef tanks
Oral Rehydration Solution Dosing Calculator
Calculate ORS volume for mild and moderate dehydration
RSI Drug Dosing Calculator
Rapid sequence intubation pre-medication, induction and paralytic doses.
TBSA Burn Calculator (Rule of Nines & Lund-Browder)
Estimate total body surface area burned for resuscitation.
Protein:Creatinine Ratio & Albumin:Creatinine Ratio Calculator
Estimate 24-hour proteinuria from a spot urine sample
Urine Anion Gap Calculator
Classify metabolic acidosis as GI versus renal bicarbonate loss
Vancomycin Dosing & AUC/MIC Calculator
Estimate vancomycin dose and interval from renal function
Warfarin Dose Estimator (Gage Algorithm)
Estimate an initial warfarin dose from clinical and genetic factors.
Warfarin INR Dose Adjustment Calculator
Calculate a weekly warfarin dose change from the current INR
Blood Alcohol Content (BAC) Calculator
Estimate your BAC with the Widmark formula — never use it to decide to drive.
Metabolic Age Calculator
Estimate your metabolic age from your BMR.
Anion Gap Calculator
Instantly compute anion gap, albumin-corrected AG, delta ratio and osmolar gap.
Body Surface Area (BSA) Calculator
Calculate BSA using Mosteller, DuBois, Haycock and three more formulae — instantly in your browser.
Cat Years Calculator
Find out how old your cat is in human years — with life-stage guidance.
Corrected Calcium Calculator
Adjust serum calcium for low or high albumin using the Payne formula.
Creatinine Clearance Calculator (Cockcroft-Gault)
Estimate kidney function for drug dosing using the Cockcroft-Gault equation.
eGFR Calculator (CKD-EPI 2021)
Estimate kidney function from serum creatinine using the latest race-free equation.
Gestational Age Calculator
Find out exactly how far along you are — in weeks and days.
eGFR Calculator (CKD-EPI 2021)
Estimate kidney function using the latest race-free CKD-EPI 2021 equation.
MAP Calculator (Mean Arterial Pressure)
Instantly compute Mean Arterial Pressure from systolic and diastolic readings.
Mean Arterial Pressure (MAP) Calculator
Instantly compute MAP from systolic and diastolic blood pressure readings.
Pet Age Calculator
Convert your pet's age to a human-equivalent age using real veterinary science.
QTc Interval Calculator
Correct the QT interval for heart rate using Bazett, Fridericia, Framingham and Hodges formulas.
Dog Years Calculator
Convert your dog's age to human years with size-aware milestones and life-stage analysis.
Caffeine Half-Life Calculator
See exactly how much caffeine is still in your system and when you can safely sleep.
Sugar Intake Calculator
Track your daily sugar consumption against WHO, AHA and NHS limits.
Fiber Intake Calculator
Find your daily fiber target and track it food by food.
Sodium Intake Calculator
Track your daily sodium and salt intake against WHO, AHA and NHS limits.
Standard Drink Calculator
Convert any drink into standard units for US, UK, Australia and Canada.