51 free tools

Medical

Clinical reference calculators for healthcare professionals and students.

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ACE Score Calculator

Calculate your Adverse Childhood Experiences score with the validated 10-question ACE survey — understand your risk level and find support resources

Adult ADHD Self-Report Scale (ASRS v1.1)

The WHO-validated 18-item screener for adult ADHD — score Part A instantly and explore the full symptom profile

Anesthesia Risk Calculator (ASA Status)

Estimate anesthetic risk using the ASA Physical Status Classification System

Anion Gap Calculator

Calculate anion gap and albumin-corrected anion gap for metabolic acidosis evaluation

APGAR Score Calculator

Assess newborn health at 1 and 5 minutes after birth using the standard APGAR scoring system

AQ-10 Autism Quotient Screener

Complete the validated 10-question AQ-10 autism spectrum screening questionnaire and get your score instantly — free, private, no signup required

AUDIT Alcohol Use Disorders Identification Test

The World Health Organization's 10-question AUDIT screening with AUDIT-C short form — scores your alcohol use and identifies risk level

Blood Pressure Log

Record, track, and interpret your blood pressure readings over time

Blood Pressure Risk Calculator

Check your AHA/ACC blood pressure category and estimate 10-year cardiovascular risk with personalized recommendations

BMI Percentile Calculator for Children

Calculate BMI percentile for children and teens aged 2-20 using CDC growth chart data

BMI Prime Calculator

Calculate BMI Prime — your ratio to the upper normal BMI of 25

Body Surface Area Calculator

Calculate body surface area (BSA) using Mosteller and DuBois formulas for chemotherapy and cardiac dosing

Burn Area Calculator (Rule of Nines)

Estimate total body surface area burned using the Rule of Nines for fluid resuscitation planning

CAGE Alcohol Questionnaire

The CAGE is a validated 4-question rapid alcohol problem screener used in clinical settings — score 2 or more suggests alcohol dependence

Concussion Symptom Checker

SCAT5-based symptom checklist to assess concussion severity, with Return-to-Play and Return-to-Learn protocol stages

Corrected Calcium Calculator

Adjust serum calcium for albumin levels using the standard correction formula

Corrected QT Calculator (QTc)

Calculate corrected QT interval using Bazett's formula for medication safety monitoring

Creatinine Clearance Calculator

Calculate creatinine clearance (CrCl) using the Cockcroft-Gault equation for drug dosing adjustments

Drug Interaction Checker

Check potential interactions between your medications — enter two or more drugs to see Major, Moderate, and Minor interaction warnings instantly

Edinburgh Postnatal Depression Scale (EPDS)

Validated 10-question postpartum depression screening tool — get your EPDS score instantly, free and private

Epworth Sleepiness Scale (ESS)

Score the validated 8-question Epworth Sleepiness Scale instantly — screen for excessive daytime sleepiness and sleep apnea risk

GAD-7 Anxiety Screening Tool

Score your GAD-7 questionnaire instantly — the validated 7-question generalized anxiety disorder scale used by clinicians worldwide

GFR Calculator (CKD-EPI)

Calculate estimated GFR using the CKD-EPI equation for kidney function assessment and CKD staging

Glasgow Coma Scale Calculator

Score eye, verbal, and motor responses to assess consciousness level instantly — free, no signup required

GLP-1 Insurance Coverage Checker

Check if Ozempic, Wegovy, Mounjaro, or Zepbound is covered by your insurance type — estimated copays, coverage tips, and alternative options

GLP-1 Medication Cost Calculator

Compare monthly costs for Ozempic, Wegovy, Mounjaro, Zepbound, and compounded alternatives by insurance status

GLP-1 Medication Dosing Schedule

Visual week-by-week titration timeline for Ozempic, Wegovy, Mounjaro, and Zepbound — FDA-approved schedules, free and private

GLP-1 Medication Savings Calculator

Compare all ways to save on Ozempic, Wegovy, Mounjaro, and Zepbound in 2026 — manufacturer cards, compounding, patient assistance, and more

GLP-1 Protein Calculator

Calculate optimal daily protein intake for muscle preservation while on GLP-1 medications

GLP-1 Weight Loss Calculator

Predict your weight loss timeline on Ozempic, Wegovy, Mounjaro, or Zepbound based on clinical trial data — free and private

Insulin Dose Calculator

Calculate insulin-to-carb ratio and correction factor using the 500 Rule and 1800 Rule from Total Daily Dose

IV Drip Rate Calculator

Calculate drops per minute and mL/hr flow rate for IV infusions — free, instant, no signup required

Lab Results Reference Guide

Interactive searchable guide to normal blood test ranges for CBC, CMP, lipid panel, thyroid, and more

Medical Bill Estimator

Estimate your out-of-pocket medical costs based on your insurance plan

Medication Half-Life Calculator

Calculate drug elimination time, concentration decay curves, and steady-state levels for common medications — free and private

Medication Interaction Checker

Check common OTC and prescription drug interactions — select two or more medications to see severity levels and recommendations

MMSE Cognitive Screener

A simplified digital cognitive screening tool based on Mini-Mental State Examination domains — orientation, memory, attention, and language

Mood Disorder Questionnaire (MDQ)

The validated 13-question MDQ screens for bipolar spectrum disorders — 7+ yes answers plus functional impairment suggests possible bipolar disorder

Needle Gauge Chart

Reference chart for needle gauge sizes — outer diameter, inner diameter, common uses for IV lines, injections, and medical procedures

Nurse Patient Ratio Calculator

Calculate recommended nurse-to-patient ratios by unit type, acuity, and shift length

Parkland Formula Calculator

Calculate fluid resuscitation volume for burn patients using the Parkland formula

PCL-5 PTSD Checklist for DSM-5

The validated 20-item PCL-5 screens for PTSD symptoms as defined by DSM-5 criteria — scores 33 and above may indicate probable PTSD

Pediatric Dosage Calculator

Calculate weight-based medication doses for common pediatric medications

Pediatric Medication Dosage Calculator

Calculate safe medication doses for children by weight — mg/kg dosing with volume conversion, free and private

PHQ-9 Depression Screening Tool

Score your PHQ-9 questionnaire instantly — the validated 9-question depression severity scale used by clinicians worldwide

Pittsburgh Sleep Quality Index (PSQI)

The validated 19-question Pittsburgh Sleep Quality Index assesses sleep quality and disturbances over the past month — scores above 5 indicate poor sleep

Pregnancy Test Timing Guide

Calculate the best time to take a pregnancy test based on your cycle

Skin Cancer ABCDE Guide

Interactive ABCDE mole self-assessment — evaluate Asymmetry, Border, Color, Diameter, and Evolution with visual examples and risk scoring

Surgical Recovery Timeline

Estimate post-surgery recovery milestones and activity restrictions by procedure type

Vaccination Catch-Up Schedule Guide

Find out which vaccines you may have missed and when to catch up

Wells Score Calculator

Calculate Wells DVT Score and Wells PE Score to assess probability of deep vein thrombosis and pulmonary embolism

These tools are for informational purposes only and do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for medical decisions.

Find the Right Clinical Reference Tool for Your Situation

These tools serve healthcare professionals, students, and informed patients who need quick access to standardized clinical calculations and screening scores. They implement published, validated instruments that appear in clinical practice — the PHQ-9, GAD-7, Glasgow Coma Scale, GLP-1 dosing guidelines, and others. Use them as reference aids alongside clinical judgment, not as standalone diagnostic tools.

Mental Health Screening Tools

Standardized screening questionnaires are the starting point for mental health assessment in primary care and psychiatric settings. The PHQ-9 Depression Screener implements the 9-item Patient Health Questionnaire with standard severity scoring — minimal (0-4), mild (5-9), moderate (10-14), moderately severe (15-19), severe (20-27). For anxiety, the GAD-7 Anxiety Screener uses the 7-item Generalized Anxiety Disorder scale with the same validated cutoffs. The PCL-5 PTSD Screener implements the 20-item PTSD Checklist for DSM-5, with a provisional diagnosis threshold of 33 or higher. For attention concerns, the ADHD ASRS Screener uses the World Health Organization's Adult ADHD Self-Report Scale. These tools present each question exactly as it appears in the validated instrument and calculate scores using standard clinical cutoffs.

GLP-1 Medications and Weight Management

GLP-1 medications (semaglutide, tirzepatide, liraglutide) have specific titration schedules and dose-response patterns. The GLP-1 Dosing Schedule maps out the standard titration timeline for the major medications, showing weekly dose escalation from starting dose to maintenance. The GLP-1 Weight Loss Calculator estimates projected weight loss based on clinical trial average response rates at each medication and dose. The GLP-1 Cost Calculator compares brand name versus compounded options with insurance scenarios, and the GLP-1 Protein Calculator helps users on these medications maintain adequate protein intake during weight loss to preserve lean body mass.

Clinical Assessment Tools

Clinical scoring tools provide standardized communication between care providers and consistent documentation. The Glasgow Coma Scale calculator scores eye, verbal, and motor responses (GCS 3-15) with standard severity thresholds: severe (≤8), moderate (9-12), mild (13-15). The APGAR Score Calculator computes the standard newborn assessment at 1 and 5 minutes on the five components (appearance, pulse, grimace, activity, respiration). The Epworth Sleepiness Scale screens for excessive daytime sleepiness, and the MMSE Cognitive Screener implements the 30-point Mini-Mental State Examination for cognitive assessment.

Medication Dosing and Clinical Reference

The Medication Dosage Calculator handles weight-based dosing calculations — commonly needed for pediatric dosing or medications dosed in mg/kg. Enter patient weight, prescribed dose, and concentration to verify the correct volume to administer. The IV Drip Rate Calculator converts medication orders to drops per minute or mL per hour for manual and electronic infusion settings. The Medication Half-Life Calculator shows drug concentration at any time point after the last dose, useful for understanding wash-out periods. The Needle Gauge Chart is a quick reference matching gauge numbers to outer diameter, inner diameter, and common use cases.

How These Tools Are Intended to Be Used

Healthcare professionals can use these tools as rapid calculation verification aids during clinical workflows, reducing manual arithmetic errors for weight-based dosing and infusion rate calculations. Students in nursing, pharmacy, and medical programs will find the clinical scoring tools helpful for learning the validated questionnaires and scoring methods used in practice. Patients and caregivers researching treatment options or trying to understand clinical scores mentioned during appointments can use these tools for educational context, always with the understanding that interpretation requires clinical judgment. The mental health screening tools are sometimes used by individuals in areas with limited mental health access as a starting point to understand their symptoms before seeking professional evaluation. In all cases, a positive screen or concerning result should prompt professional consultation, not independent action based on a calculator result alone. All tools in this section run entirely in your browser — no responses, scores, or personal health data are transmitted to any server or stored anywhere. This design is intentional for health-related tools where data sensitivity is high. Every calculation stays on your device and disappears when you close the browser tab. For clinical reference use, these tools are designed to reduce arithmetic errors and provide quick score lookups — the kind of calculations that are simple in principle but easy to miscount when done manually under time pressure. They're built to be fast: one input field, one result, no menus or navigation required. Clinical calculators that require navigating multiple screens or entering unnecessary patient demographics slow down the lookup process and increase friction. These tools prioritize the minimum inputs needed for the calculation and return the result immediately. For healthcare educators, the standardized scoring tools can also serve as teaching aids for students learning to administer and interpret validated instruments for the first time.

FAQ

Are these tools free?

Yes, every tool is completely free to use with no signup, no account, and no hidden fees.

Is my data safe?

Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.

Do I need to create an account?

No. Every tool works instantly with no registration required. Just open and start using.

Are these tools suitable for clinical use?

These tools implement validated clinical instruments and are suitable as reference aids for healthcare professionals and students. They are not a substitute for clinical judgment, formal diagnostic evaluation, or consultation with a qualified clinician. Always verify calculations with your institution's protocols.

How accurate are the mental health screening scores?

The PHQ-9, GAD-7, PCL-5, and other screening tools implement the exact published questionnaire items and standard scoring algorithms. They produce the same scores a clinician would calculate manually. However, screening tools identify symptom severity ranges — they are not diagnostic instruments, and a positive screen always requires clinical follow-up.

Who are the GLP-1 calculators designed for?

The GLP-1 tools are for patients prescribed these medications (or considering them) who want to understand dosing schedules, project weight loss timelines, or compare costs between options. The dosing information reflects standard manufacturer titration schedules, but your prescribing physician's instructions take precedence.

Can I use the medication dosage calculator for pediatric patients?

The Medication Dosage Calculator supports weight-based dosing calculations, which is the standard approach for pediatric dosing. Always verify the dose, concentration, and route against the prescribing order and your formulary. For high-risk medications, independent double-check by a second clinician is standard practice.

What does the Glasgow Coma Scale score mean?

The GCS ranges from 3 (no response) to 15 (fully alert). Scores of 13-15 indicate mild injury, 9-12 moderate, and 8 or below severe neurological impairment. A score of 8 or below is the clinical threshold commonly used for airway management decisions. The GCS Calculator scores each of the three components (eyes, verbal, motor) separately before computing the total.

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