Editorial policy
Last updated
We publish math, not medical advice. Every calculation is tested before it goes live, every page is written in plain English, and we fix mistakes as soon as we find them.
Accuracy comes first
- One source for the numbers. The calculators, charts and chart FAQ answers are all built from the same calculation code. Guides explain the math with worked examples, and we check their numbers against the calculator.
- Automated tests. Tests compare the results with hand-worked answers and with the same math done a different way. They also check rounding, unit conversions and syringe scales. These tests run every time the site is published, and a failing test stops the update from going live.
- Syringe scales. The syringe drawings follow the markings on common 0.3 mL, 0.5 mL and 1 mL insulin syringes.
No dose suggestions
We never suggest or preset a dose for any named product. Examples use neutral numbers, like “a 250 mcg dose”, only to show how the math works. The dose you enter is your own, and it should come from a qualified healthcare professional.
How we write
- Pages answer the question first, then explain.
- We aim for plain English that most readers can follow.
- Guides list their sources, and we prefer official and peer-reviewed ones.
- Each guide shows the date it was last updated.
Corrections
If you find a mistake, please tell us through the contact page. We check every report. When we fix an error in a guide, we update its “last updated” date.
Independence
The site may show ads in the future to cover its costs. Advertisers never choose or change what we write, and ads never appear between a calculator’s inputs and its result.