What this site is
PercentageCalculator.ie is a fast, no-clutter set of percentage tools: percent of a number, percentage change, increase and decrease, and reverse percentages. Type, get the answer, done.
It exists because working out a discount or a mark-up should not require scrolling past three screens of ads on some international mega-site.
Where the data comes from
There is no external data here, just arithmetic, which is checked by automated tests every time the site is updated.
How it stays accurate
The maths never goes stale. The site itself gets small improvements based on what visitors actually use.
Who runs it
PercentageCalculator.ie is a personal project, built and maintained by an independent web developer. It is free to use and not affiliated with any government body or official organisation. The tools here are provided for convenience; for decisions that matter, always confirm with the official source.
Contact
Spotted a mistake or have a suggestion? Email hello@percentagecalculator.ie. Corrections usually go live within a day or two.