Free Online Calculator
A browser-based calculator with keyboard support, memory functions, and calculation history.
0
How to Use the Free Online Calculator
This free online calculator runs entirely in your browser — no download, no registration, and no ads interrupting your work. It works on PC, Mac, tablet, and smartphone (iPhone and Android). Simply click or tap the buttons, or use your keyboard for fast input.
Basic Operations
Enter a number, choose an operator (+, −, ×, ÷), enter the second number, then press = or Enter. The result appears instantly. Use CE to clear the current entry without losing your previous input.
What You Can Calculate
- Everyday arithmetic — shopping totals, bill splitting, tips
- Tax calculations (8% and 10% shortcuts built in)
- Percentage and discount calculations
- Square root (√) and squaring (x²)
- Work calculations and verification
Memory Functions
- MS — Store the current value in memory
- MR — Recall the stored value
- M+ — Add the current value to memory
- M− — Subtract the current value from memory
- MC — Clear memory
Related Calculators
- Scientific Calculator — Trigonometry, logarithms, and advanced math
- Percentage Calculator — Ratios, change rates, and proportions
- Tax Calculator — Calculate prices including and excluding tax
- Loan Calculator — Mortgage and loan repayment simulation
- Fraction Calculator — Add, subtract, multiply, and divide fractions
Frequently Asked Questions
Is this calculator free to use?
Yes, completely free. No registration, login, or app install needed — just open your browser and start calculating.
Does it work on smartphones?
Yes, it is optimised for iPhone and Android. The layout adapts to touch screens so you can calculate comfortably on mobile.
Can I use the keyboard?
Yes. Use number keys, operators (+, -, *, /), Enter to calculate, Esc to clear, and Backspace to delete.
What does the % button do?
It calculates a percentage of the current value. For example, 100 + 10% gives 110.
How does the memory function work?
MS stores the current value, MR recalls it, M+ adds to memory, M− subtracts, and MC clears memory.
Can I save my calculation history?
Yes. Results are saved automatically in the history panel. You can also export them as TXT or CSV.
Is the calculator accurate?
Yes, it uses high-precision arithmetic. Very large numbers or many decimal places may have minor rounding differences.