What are the memory functions (MC, MR, M+, M-)?

Memory functions let you store and recall numbers. MC (Memory Clear) erases the stored value. MR (Memory Recall) displays the stored value. M+ (Memory Add) adds the current display value to memory. M- (Memory Subtract) subtracts the current display value from memory. A memory indicator appears when a value is stored.

Is this calculator free to use?

Yes, this calculator is completely free with no limits. Use it for basic arithmetic, scientific calculations, or complex mathematical expressions. No registration or downloads required. Your calculation history is stored locally on your device for privacy.

Online Calculator

Perform basic and scientific calculations online. Free calculator with arithmetic, trigonometric, logarithmic, and scientific functions. Full keyboard support, calculation history, and memory functions.

Mode

Live

History

Calculations will appear here.

Your All-in-One Online Calculator

Whether you need to split a dinner bill, solve a homework problem, or compute complex scientific expressions, this calculator handles it all. Switch between Basic mode for everyday arithmetic and Scientific mode for advanced math including trigonometry, logarithms, and more. Full keyboard support means you can type expressions naturally, and your calculation history is saved locally so you can reference past results anytime.

How to Use

Choose Your Mode

Select Basic for standard arithmetic (+, −, ×, ÷) or Scientific for advanced functions (sin, cos, tan, log, ln, √, x², xⁿ, n!, π, e). Scientific mode also shows memory (MC, MR, M+, M−) and parentheses buttons.

Enter Your Calculation

Click buttons or type on your keyboard. Numbers, operators (+, −, ×, ÷), decimal points, and parentheses all work. The display shows your expression in real-time. Press = or Enter to evaluate.

View History & Reuse Results

Every calculation is saved to the history panel. Click any history entry to load its result back into the calculator. Export your history or clear it anytime.

Keyboard Shortcuts

Key	Action
0-9	Enter digits
.	Decimal point
*+ − /**	Arithmetic operators
Enter or =	Calculate result
Escape	Clear all (C)
Backspace	Delete last character
( )	Parentheses
%	Percentage

Frequently Asked Questions

How do I use the scientific calculator?

Switch to Scientific mode using the mode toggle at the top. This reveals additional function buttons including trigonometric functions (sin, cos, tan), logarithms (log, ln), square root (√), power (xⁿ), factorial (n!), and constants (π, e). Click the function button first, then enter the number, or enter an expression using parentheses for complex calculations.

Does this calculator support keyboard input?

Yes! Full keyboard support is included. Use number keys for digits, +, -, *, / for operations, Enter or = for equals, Escape for clear, Backspace for delete, and ( ) for parentheses. The period key enters a decimal point.

What are the memory functions?

MC (Memory Clear) erases the stored value. MR (Memory Recall) displays the stored value. M+ (Memory Add) adds the current result to memory. M- (Memory Subtract) subtracts the current result from memory. A memory indicator appears when a value is stored.

Is this calculator free?

Yes, completely free with no limits. No registration or downloads required. Your calculation history is stored locally on your device for privacy.