About Lelifi

Lelifi is a growing collection of free online tools for everyday problems: fees, conversions, dates, text and money math.

Why this site exists

Most "free calculator" pages make you scroll past three ad blocks, sign up, or download an app just to divide two numbers. Lelifi is the opposite: open a page, get your answer, close the tab. Every tool is a single static page that loads fast and works on a phone.

How the tools work

All calculations run in your browser with JavaScript. Nothing you type is uploaded, stored or logged on our servers. We literally have no database to store it in. The pages are static files served through Cloudflare.

How we keep the lights on

Lelifi is free and will stay free. If we later run advertising or include affiliate links to products we mention, those will be clearly marked and will never change the numbers you get. The math is the math.

Accuracy

Fee schedules, tax rates and conversion factors change. We check each tool against the official source when we publish it and review them periodically, but you should always confirm important numbers with the official source (your marketplace, your bank, your tax authority) before you rely on them.

Found a bug or a wrong number?

Please tell us, see Contact. Corrections are usually live within a day.