About

CalcBox is a small set of fast, free calculators for everyday questions — loans, GST, savings, dates, health and text.

Every tool updates as you type, works on any phone, and needs no sign-up. Your pinned and recent tools are saved only on your device.

Accuracy

We use standard, published formulas and test them carefully. Results are estimates for planning. For financial, tax or medical decisions, please check with a qualified professional.

Feedback

Found a bug or want a new calculator? Get in touch.