Semjigi is a free web service that brings together the calculators, converters and test tools you reach for in daily life and at work.
Every tool works right away with no sign-up or install. Even tools that handle files, like image and PDF converters, never upload your files to a server — they're processed only inside your browser. That makes them fast, and your personal files never leave your device.
How we run things
- Calculation rules (tax rates, insurance rates, minimum wage, etc.) are updated as laws change.
- Results are for reference only. For important decisions, check with the relevant agency or a professional.
- The site is funded by advertising.
Send bug reports or new tool ideas through the contact page.