Basic Calculator
A clean, responsive basic calculator for quick arithmetic. Fast, mobile-friendly, and works entirely in your browser.
About This Calculator
This basic calculator supports addition, subtraction, multiplication, division, and percentage operations. It uses standard order of operations and handles decimals accurately.
Can I use keyboard shortcuts?
Yes — type digits and operators directly from your keyboard. Press Enter or = to calculate. Backspace removes the last character. Escape clears all.
Need more functions?
Try the Scientific Calculator for trigonometry, logarithms, and powers.
A fast, clean calculator for everyday arithmetic
This basic calculator handles addition, subtraction, multiplication, and division — the four operations covering most quick academic calculations: splitting assignment marks, totalling credits, checking percentage contributions, and verifying weighted grades.
Unlike a phone calculator, this one runs in your browser without any app and works on any device with no ads to interrupt your calculations.
When to use basic vs scientific
| Task | Basic | Scientific |
|---|---|---|
| GPA and percentage arithmetic | ✓ | ✓ |
| Weighted grade calculation | ✓ | ✓ |
| Trigonometry (sin, cos, tan) | ✗ | ✓ |
| Logarithms and exponents | ✗ | ✓ |
| Factorial and combinations | ✗ | ✓ |
Does this calculator remember my calculations?
Yes — within the current browser session your calculation history is available to review. History does not persist after you close the tab, so note down any important results you want to keep.
Can I use this calculator in exams?
This is a web-based calculator requiring an internet connection, so it is suitable only for open-book, device-permitted settings. Most formal exams require a physical calculator — check your exam rules before relying on any online tool.
What is order of operations in this calculator?
Standard mathematical order of operations (PEMDAS/BODMAS) applies: expressions in parentheses are evaluated first, then exponents, then multiplication and division left to right, then addition and subtraction left to right. Use parentheses to control evaluation order for complex expressions.