Instacalc Online Calculator

Faster than Windows Calc
Results appear as you type. Edit in real-time. Easier than Excel Use readable numbers and equations. Painless Sharing Save a link or embed in your webpage. Readers can see your thoughts, update the numbers, and link to the new results. No logins, no hassles. Explore Try charts, programming and more.

Reference

Arithmetic	3 + 4 - 2	2 * (5 / 9)
	sqrt(25)	power(5:2)
Numbers	2 billion	3.4 million
	2b	3.4m
	1,230	1.23e3
Variables	x = 9	sqrt(x)
Random	random	0...1
	random(10)	1...10
Rounding	roundup(3.2)	rounddown(3.2)
	round(3.49)	abs(-3)
Rows	r1	r1 + r2
	sum(r1:r3)	average(r1:r3)
Charts	piechart(r1:r3)	barchart, linechart
Trig (rad)	sin(3)	cos, tan
	asin(0)	acos, atan
Logs and E	exp(1)	2.718...
	ln(2)	0.693...
Computers	2.3 MB	30 GB
	1.5 mbps	5MB / 192kbps
Time	time(90)	= 1m 30.00s
Binary	BIN(13)	00001101
	OCT(13)	15
	HEX(13)	0x000d
	FROMBIN(1101)	13
	FROMOCT(15)	13
	0x000d	13
Binary ops	a & b (and)	a \| b (or)
	a ^ b (xor)	~a (not)
Logic	3 > 2	= true
	if (a > b){"bigger"} else {"smaller or equal"}
Programming	x++	x += y
Comments	x = 3 //text
Insert Row	Click "r1"	Click "insert row"
Hide details	Click "r1"	Click "show/hide..."

InstaCalc makes charts! You can even pick a color scheme. Show me!

Switch to: Bar chart - Line chart - Pie chart