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Clinical tools designed for emergency & primary care

62+ free medical calculators following internationally recognized guidelines (WHO, NICE, ACOG, and consensus groups). Fast, accurate, and entirely privacy-focused.

Browse All 62 Calculators → 💊 Global Drug Dosing Index

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💉 Rabies PEP WHO Protocol 💊 Amoxicillin 🫘 CrCl (Cockcroft-Gault) 🫀 CHA₂DS₂-VASc 👶 APGAR ⚖️ BMI Calculator 🫁 CURB-65

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Fast, accurate, and clinically validated tools used by doctors every day.

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🦠 Infectious Disease · Guidelines Context

💉 Rabies PEP Scheduler

Calculate vaccination dates (Days 0, 3, 7, 28) and RIG dose by body weight based on current international guidelines. Covers wound categories I–III.

Essen Regimen RIG Calculator Category I–III WHO 2018 Protocol

Open Scheduler →

#1

Most Visited

4

Dose Dates

WHO

Guideline

Amoxicillin Dosing

Weight-based mg/kg for ENT & UTIs

Insulin Calculator

Basal-bolus & correction factor sliding scale

Mean arterial pressure targets & shock thresholds

🆕 Recently Added

New Calculators

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Bedside sepsis risk

CHA₂DS₂-VASc

AFib stroke risk

Mental health screen

NRP 2020 resuscitation

ARV Dose Calculator

RIG by weight configurations

Metabolic acidosis

💧 IV Drip Rate Calculator

Drops/min · mL/hr · Try it right here

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Drops / min

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mL / hour

Volume (mL)

Time (Hours)

IV Set Drop Factor

Standard Set 15 gtts/mL

Paeds Set 60 gtts/mL

Formula Dpm = (Vol × F) / Min

mL/hr Vol / Time

🚨

Emergency & Critical Care

8 tools

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CURB-65 Calculator

Pneumonia severity score with 30-day mortality risk and BTS-guideline admission decisions for CAP.

PneumoniaBTS Guidelines

NEWS2 Calculator

National Early Warning Score 2 — SpO₂ Scale 1 & 2, ACVPU, with RCP clinical response thresholds.

Acute DeteriorationRCP 2017

Glasgow Coma Scale for adults and paediatric patients (Adelaide scale). Supports intubated T modifier and TBI severity.

NeurologyAdult + Pediatric

Burn & Parkland Calculator

Rule of Nines TBSA estimation with 24-hour Parkland formula fluid resuscitation plan. Adult and paediatric.

Parkland Formula4mL/kg/%TBSA

Wells Score — DVT & PE

Pre-test probability for DVT and Pulmonary Embolism with NICE-guideline D-Dimer and imaging pathways.

DVT · PENICE Guidelines

Anion Gap Calculator

Anion gap with albumin correction. Identify high-AG vs normal-AG metabolic acidosis and delta-delta ratio.

Metabolic AcidosisDelta-Delta

Mentzer Index Calculator

Differentiate beta thalassemia from iron deficiency anaemia using MCV and RBC count. 90%+ accuracy.

Thalassemia vs IDAHematology

Mean arterial pressure from SBP and DBP. SSC 2021 sepsis targets, shock thresholds, cerebral perfusion pressure.

Shock ThresholdSSC 2021

👶

Paediatrics & Neonatology

8 tools

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Neonatal Jaundice Calculator

Phototherapy thresholds for newborns ≥35 weeks by age-in-hours. AAP 2022 & related parameters.

AAP 2022Clinical Guidelines

Pediatric Asthma Action Plan

Green/Yellow/Red zone guide for child asthma. Medication actions, emergency signs, WhatsApp sharing.

GINA 2024Printable

Immunisation Tracker

Comprehensive timeline tracker tools for childhood immunization parameters from birth to 16 years.

Schedule ReferencePediatric Health

Child Growth Chart

Weight, height, BMI and head circumference Z-scores with SAM/MAM/stunting classification. WHO 0–5 yrs.

WHO PercentilesSAM · MAM

Child Milestones Tracker

Check developmental milestones by age — speech, motor, social skills. Identify delays with red flag alerts.

0–5 YearsRed Flags

Paracetamol Dose Calculator

Exact dose by weight (15mg/kg) or age. Syrup volumes for standard clinical concentrations.

15 mg/kg dosingAntipyretic Reference

ORS Rehydration Calculator

Exact ORS volumes for mild and moderate dehydration by weight. Zinc dose, ORS prep guide.

WHO Plan A & BFluid Management

APGAR Score Calculator

Interactive newborn assessment at 1, 5, and 10 minutes. NRP 2020 resuscitation guide included.

1 · 5 · 10 MinNRP 2020

🏥

General Medicine & Dosing

12 tools

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Drug Dose Calculator

Weight-based doses for antibiotics, antipyretics and emergency drugs. Custom drug concentrations.

mg/kg dosingPaediatric + Adult

ARV Dose Calculator

Anti-Rabies Vaccine — wound category, RIG dose by weight (HRIG/ERIG), Essen IM and intradermal schedules.

Category I·II·IIIWHO 2018

IV Drip Rate Calculator

mL/hr, drops/min, infusion time. Macro, micro, and burette drip sets supported.

mL/hr · drops/minDrop Factors

BMI metrics suite offering toggles between global standard definitions and localized risk threshold matrices.

Adaptive CutoffsIdeal Weight Range

eGFR Calculator

CKD-EPI 2021 equation. CKD staging, dose adjustment flags, and nephrology referral thresholds.

CKD-EPI 2021CKD Staging

HbA1c Converter

Convert HbA1c between % (NGSP) and mmol/mol (IFCC). eAG and diabetes control algorithms.

NGSP ↔ IFCCADA Aligned

Corrected Calcium

Adjust serum calcium for hypoalbuminaemia. Identifies hypo/hypercalcaemia masked by low albumin.

HypoalbuminaemiaCa²⁺ Correction

Child-Pugh Score

Liver disease severity — Class A, B, C with 1-year and 2-year survival estimates. Surgical risk guidance.

Liver CirrhosisClass A · B · C

Ideal body weight — Devine, Robinson, Miller, Hamwi formulas. ARDSNet tidal volume. Drug dosing reference.

4 FormulasARDSNet Tidal Vol

Creatinine Clearance (CrCl)

Cockcroft-Gault with CKD staging. Auto dose adjustment parameters for high-risk critical clear medications.

Cockcroft-GaultDrug Dose Adjust

PHQ-9 & GAD-7 Screener

Validated depression and anxiety screening. NICE-guideline management. Item 9 suicidality alert included.

PHQ-9 DepressionNICE Guidelines

CHA₂DS₂-VASc Score

Stroke risk stratification in AFib. Annual stroke risk % and anticoagulation recommendations.

AFibAnticoagulation

🤰

Obstetrics & Gynaecology

2 tools

ObsCalc — Obstetric Suite

10 obstetric tools — gestational age, EFW Hadlock, Bishop score, Apgar, GDM dates, VBAC eligibility and PPH risk.

Bishop · Apgar · VBACUniversal Metrics

Due Date Calculator

Pregnancy due date from LMP, IVF transfer or ultrasound. Week-by-week milestones, scan reminders.

LMP · IVF · UltrasoundWeek by Week

🏭

Occupational Health

2 tools

Spirometry Predicted Values

FEV₁, FVC, FEV₁/FVC and PEFR predicted values using standard reference equations. Classify obstructive, restrictive and mixed defects.

Spirometry EquationsATS/ERS Aligned

Biomedical Waste Guide

Search 76+ waste items. Instant colour-code matrix parsing with recommended segregation and safe disposal tracking notes.

Waste ManagementCompliance Reference

📋 Built Against

Guideline References

RxMedCalc tools are built following recognized international clinical consensus guidelines.

🌍 WHO Consensus ACOG NICE / BTS GINA 2024 CKD-EPI 2021 ADA Aligned AKIN / KDIGO NRP 2020 AAP 2022 SSC 2021 RCP 2017

Engineered for International Clinical Guidelines

A unified medical platform built to handle standard global equations along with localized risk stratifications safely.

⚖️

Adaptive BMI Classifications

Toggle instantly between global WHO classification thresholds and localized parameters (including adjusted ethnic variant metrics) seamlessly.

💉

Validated Exposure Protocols

Calculations follow international standard guidance, including the 4-dose WHO Essen Rabies PEP regimen and accurate, weight-based RIG dose tracking.

🤰

Universal Obstetric Metrics

Dating and biometry scoring elements leverage standard Hadlock equations and clinical criteria verified alongside international parameters.

🌍

Peer-Reviewed Decision Stratification

Calculators like CURB-65, NEWS2, GCS, and Wells criteria follow consensus definitions from BTS, RCP, and NICE to ensure cross-border accuracy.

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