Calculator
The Calculator is a simple online calculator for everyday maths, with a scientific mode for more advanced sums. It is free to use, needs no login or signup, and runs right in your browser — nothing to install.
What it does
- Basic maths plus a scientific mode with trigonometry, logs, roots and powers.
- Calculation history so you can check your earlier sums.
- Memory functions to store and reuse a number.
- Quick actions for everyday sums — add 10%, add 18% GST, tips, half, double and more.
How to use
- Open the tool using the button above.
- Tap the numbers and operators to build your sum.
- Press = to see the answer.
- Switch to scientific mode for trigonometry, logs and powers, and check your history for earlier sums.
Frequently asked questions
Is the Calculator free?
Yes. The calculator is completely free, with no login, no signup and no payment.
Does it have scientific functions?
Yes. Switch to scientific mode for trigonometry, logarithms, square roots, powers, factorials and more.
Do I need to install anything?
No. The calculator runs in your browser on any phone, tablet or computer — just open the page and start calculating.