Free Online Calculator – Large – History – Memory

Calculator

JavaScript Needed

M+

M−

Clear

History

Math Constants

Archimedes' Constant Pi
3.1415926535Alt-P

Natural Logarithmic Base
2.7182818284Alt-E

Golden Ratio
1.6180339887Alt-G

Euler's Constant
0.5772156649Alt-Y

√2

Pythagoras' Constant
1.4142135623Alt-S

√3

Theodorus' Constant
1.7320508075Alt-T

√5

Golden Ratio's Friend
2.2360679774Alt-F

Speed of Light (m/s)
299792458Alt-C

Examples

Calculate	Button/Key Sequence
2 x 3	23=
(2 x 3) + 10	23+10=
2 x (3 + 10)	3+102=
√ 2	2
1/1024	1024
2 x √ 2	22=
-2³	2==
√ 3² + 4²	3+4=
π x 10²	10=Alt-P=
256 + 10%	256+10=
5% of 25	525=
5³ √ 2 + 6	2+6= 5===

Keyboard Shortcuts

Button	Key

0...9	0 ... 9	Digits

AC	Esc	All Clear
CE	Delete	Clear Entry
		Backspace
=	=orEnter	Equals
.	.	Decimal Point

	+	Add
	-	Subtract
	*orX	Multiply
	/	Divide

M+	A	Memory Add
MC	C	Memory Clear
MR	R	Memory Recall
M−	S	Memory Subtract

	I	Invert +/-

	F1	Square Root
	F2	Percent
	F3	Reciprocal 1/x
	F4	Squared x²

	Alt-P	π - Pi
	Alt-E	e - Natural Log
	Alt-G	ϕ - Golden Ratio
	Alt-Y	γ - Euler's Constant
	Alt-S	√2 - Square Root 2
	Alt-T	√3 - Square Root 3
	Alt-F	√5 - Square Root 5
	Alt-C	c - Light (m/s)

Reset

Settings

Display

Floating Point

Digit Grouping

Decimal Symbol

0.0

Negative Number

0.0

Rounding

Round calculated Fixed Point results
when they are displayed.

Fix Math Errors

Turns 1.3499999999... into 1.35
From accuracy limit of 64-bit values.

Show Math

Displays math expression while it is
entered:e.g. 20 + 5 × 5 − 15

Save Work

Loads history, memory, and settings
when calculator is restarted.

To Calculator

Bookmark this link for above settings . . .

Features

12-Digit display, 16-Digit math accuracy
Simple left to right math calculations
Fixed or floating point operation
4 Math operands (Add, Subtract, Multiply, Divide)
5 Math functions (Square Root, Squared, Reciprocal, Inverse, Percent)
4 Memory functions (Add, Subtract, Recall, Clear)
Clear all, clear entry, and backspace
Digit grouping 000's along with
international ',' and '.' use settings
Keyboard input with button feedback
Reusable math calculation history
(last 100 calculations)
Savable settings, history, memory, and display
Easy to repeat last operation
Displays math expression
Copy and paste values
Clear error messages
Resizable

About

Brand:Internet Calculator

Name:Calculator

Version:

Calculator excels in . . .

Accuracy
Robustness
Ease of Use
Speed

Perfect for use in meetings, classrooms,
and at home.

Free Large Online Calculator

Our free large online calculator has a 12-digit display, calculation history, and memory functions. It's fully resizable and fills the window/screen from desktops to smartphones.

Saves your work in browser storage so when reopened it picks up right where you left off, even mid-calculation. Supports keyboard input, international number formatting, and the last 100 calculations are saved in history and reusable with one click.

Built for daily use at home, in meetings, or in the classroom. No download, no install, no account required. Just open and calculate.

12-Digit Display — with 16-digit math precision
Calculation History — saves last 100 calculations for quick reuse
Memory Functions — store, recall, add, and subtract from memory
Saves Your Work — picks up where you left off after closing
Copy and Paste — copy result out, paste value in
Fully Resizable — fills window size on desktop or laptop
Keyboard Support — full keyboard input with highlight feedback
International Formats — choose digit grouping and decimal symbol
Nothing to Install — runs in any modern browser

A Few Quick Tips . . .

Click calculator title so calculator scrolls into view.
Click equation above result to jump to calculation history.
Press Escape key to jump back to calculator from anywhere.
Press Equal button again to repeat last math operation.

Frequently Asked Questions