About

Who built this

A software engineer. Frustrated by ad-laden, ugly calculators, I built a clean one I would actually use myself.

Principles

Fast: static pages, instant load.

Private: 100% client-side. Inputs are never sent or logged.

Free: no popups, no banner ads, no upsells.

Universal + local: standard formulas worldwide, plus region-specific tools where useful (e.g. HK tax code, HKMC rules).

Disclaimer

All results are for reference only. Actual figures depend on the relevant authority (bank, tax office, health department, etc.). The site assumes no liability for losses arising from use of these tools.

Contact

Want a new tool or have feedback? Email [email protected].