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

Basic Commands (Click to load example in new window)
Feature	Example	Result
Arithmetic + - * /	2 + 2 - 3 (3 * 5) / 2	1 7.5
Roots & powers	sqrt(9) 5^2	3 25
Percent	5% 100 * 17% 20 + 50%	0.05 117 30
Number shortcuts (k, m, b, t)	3.3k 200 million (or 200m) 6.6 billion (or 6.6b)	3,300 200,000,000 6,600,000,000
Exponent notation	1.234e3 1e-3	1,234 0.001
Variables & Rows
Using variables	x = 9 y = x + 3 sqrt(x) x + y	9 12 3 21
Using rows	r1 r2 r3 sum(r1:r3) average(r1:r3)	9 12 3 24 8
Formatting Cells
Currency formatting	$5 $5 / 3	$5.00 $1.67
Add comment (text to ignore)	30 + 40 // new total	70 new total
Hide row	Click result to hide row
Insert/remove row	Click "R1" to display row options
Making Charts
Enter data in rows	bob = 18 joe = 27 jim = 31	18 27 31
Type: bacrchart, piechart, linechart	barchart(r1:r3) (Variable names become labels)	Click for example
Other Number Commands
Random numbers	random random(10)	0.434... (from 0...1) 7 (from 1...10)
Rounding	round(3.51) roundup(3.01) rounddown(3.99)	4 4 3
Absolute value	abs(-2)	2
Factorial	3!	6
Trigonometry & Logarithms
Constants	PI E	3.14159... 2.71828...
Degrees & radians (degrees by default)	30 30 deg PI rad	30 30 180
sin, cos, tan asin, acos, atan	sin(30) sin(PI/4 rad)	0.707... 0.707...
e^x Natural Log (ln) Log base 10 (log)	exp(2) E^2 ln(2) log(2)	7.389... 7.389... 0.693.. 0.301...
Computer Units
File sizes (bytes) (kb, mb, gb, tb, pb)	1kb 10 gb / 5mb	1024 2048
Bandwidth (bits/sec) (kbps, mpbs, gbps)	1.5 mbps	196,608 (converted to bytes/sec)
Time	time(90) time(1gb / 1.5mbps)	1m 30.00s 1h 31m 1.333s
Base Conversion
Into decimal	0b1001 (binary) 0o567 (octal) 0xfeff (hex)	9 375 65,279
From decimal	bin(9) oct(375) hex(65,279)	0b00001001 0o567 0xfeff
Programming
Binary operators (and or xor not)	bin(a = 3) bin(b = 5) a and b bin(a and b) a or b a xor b not a	0b00000011 0b00000101 1 0b00000001 7 6 -4 (two's complement)
Logical operators (> >= == <= <)	2 * 2 > 3 x = 3 2 * 2 > x	true 3 true
Conditional statements	if (3 > 2){"bigger"} else {"smaller or equal"}	bigger
Shorthand	x = 3 ++x x += 3	3 4 7
Unit Converion The unit turns green if the conversion was done. Use words like "to", "in" or "into" for conversions.
Length: in, ft, yd, mile, knot nm, um, mm, cm, m, km, light year
Weight: oz, lb, ton ug, mg, g, kg
Volume: tsp, tbsp, cup, pint, quart, gallon ml, L
Time: ps, ns, us, ms, s, min, hour, day, week, month, year, decade, century, millenium
Speed: mph, kmph Create unit: meters/sec, miles/day, cm/year, etc.
Length in, ft, yd, mile, knot nm, mm, cm, m, km	5 ft to cm 5 * 3 m in cm 1 knot in feet	152.4 cm 1,500 cm 6,076.11549 feet
Weight oz, lb, ton g, kg	1 ton in lbs 150 lbs in kg 1 oz in g	2,000 lbs 68.0388555 kg 28.349523125 g
Liquid Volume cup, pint, quart, gallon ml, liter	1 gallon in liters 1 cup in cm^3 1 cup in tablespoons	3.78 liters 236.588237 cm^3 16 tablespoons

Charts [load example]

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

Switch to: Bar chart - Line chart - Pie chart