Useful tools.
Visible reasoning.
Straightforward calculators for people who want to understand the number as well as obtain it.
Our purpose
Ariflone offers free health and clinical formula calculators for students, nurses, clinicians, and general readers. Each tool brings its equation, unit conventions, examples, and limitations together in one place.
Who is behind the site
Author and operator: [AUTHOR NAME]. Credentials: [CREDENTIALS]. Clinical reviewer: [REVIEWER NAME AND CREDENTIALS]. These fields are awaiting completion; no medical credentials or independent clinical review are claimed.
How the tools are checked
The code includes reproducible arithmetic tests for every calculator and checks units and input ranges. References explain where equations originate and where common conventions differ. Automated checks are not clinical validation. Read the Editorial Policy for the intended review process.
Privacy by design
Calculations run on your device. The tools do not send, save, or track the values you enter. This version has no analytics or advertising scripts. Hosting providers still process ordinary page requests as described in the Privacy Policy.
Help improve a calculator
If a formula, explanation, or unit conversion appears incorrect, email contact@ariflone.com with an anonymized, reproducible example.
Explore all five calculators →