About OnlineCalc
Our mission is to make everyday calculations fast, accurate, and delightful on any device.
Mission
We build high‑quality calculators and guides across health, finance, travel, school, and more—optimized for clarity, speed, and accessibility.
What we stand for
Accuracy
Formulas and assumptions are documented, tested, and periodically reviewed.
Usability
Clear inputs, instant results, and responsive layouts that work on any screen.
Accessibility
Semantic markup and keyboard‑friendly controls wherever possible.
What you’ll find
- Popular calculators like BMI, Mortgage, Tip, Taxes, Investment Growth, and more
- Guides that explain the math behind the numbers
- Lightweight pages with no sign‑up required