Incidence Rate & Prevalence Calculator
Calculate disease prevalence (existing cases) and incidence rate (new cases over time) in a population. Essential epidemiological metrics for public health and disease surveillance.
Incidence Rate & Prevalence
basicCalculate disease prevalence and incidence rate
Formula
Prev = existing/pop, Inc = new/(pop × time)
Scenario A
How It Works
Prevalence measures how many people in a population have a disease at a specific point in time.
Incidence Rate measures how many NEW cases develop over a specific time period.
Prevalence (%) = Existing Cases / Total Population × 100
Incidence Rate = New Cases / Population × 100,000 / Years
Example
A city of 10,000 people has 500 existing diabetes cases and 100 new cases diagnosed this year:
Prevalence = 500/10,000 × 100 = 5.00%
Incidence Rate = 100/10,000 × 100,000/1 = 1,000 per 100K/year
Frequently Asked Questions
What is the difference between prevalence and incidence?
Prevalence = ALL existing cases (like a snapshot). Incidence = NEW cases over time (like a video). Prevalence depends on both incidence AND disease duration.
Why use per 100,000 for incidence?
Standardizing to per 100,000 allows comparison across populations of different sizes. This is the standard convention in epidemiology and public health reporting.
Save Configuration Snapshot
Save current parameters to your dashboard for instant one-click reloading.
About This Calculator & Guide
About the Incidence Rate & Prevalence Calculator
The Incidence Rate & Prevalence Calculator is a specialized online utility designed to help you calculate disease prevalence and incidence rate from population health data. free online epidemiology calculator. It performs calculations in real-time to provide immediate, reliable estimates for study, work, or daily tasks.
How to Use
Simply enter your parameters in the input fields of the calculator widget above. The tool evaluates the inputs instantly and displays the results in real-time. You can modify any value to check alternate scenarios and compare figures dynamically.
Data Privacy & Safety
All calculations are executed locally within your web browser. No inputs are sent to our servers or stored externally, ensuring your personal and financial details remain completely private and secure.
FAQ
Frequently Asked Questions
What does the Incidence Rate & Prevalence Calculator do?+
Calculate disease prevalence and incidence rate from population health data. Free online epidemiology calculator. It is designed for quick everyday use and gives clear results without requiring a sign in.
Is the Incidence Rate & Prevalence Calculator free to use?+
Yes. The Incidence Rate & Prevalence Calculator is free to use online and works directly in your browser.
Can I use the Incidence Rate & Prevalence Calculator on mobile?+
Yes. The calculator layout is responsive, so you can use it on phones, tablets, laptops, and desktop screens.