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Convert to New Units


From: ( Initial Units or Expression )
To: ( New Units )


Result: ( Initial Value with New Units )

Help Information

	Examples
	From	To	Result
foot		inch	12 inches
83 deg-F		deg-C	28.333333333 degrees-Celsius
(360 * 160) ft^2		acre	1.3223140496 acres
70.4 kg + 115 lb		lb	270.20543258 pounds-mass
(20ft + 2in) * (15ft - 8in)		yd^2	32.117283951 yards^2
-16.2 + sqrt(16.2^2 - 4 * 3.1 * 0.7)		1	-0.27015379861
(1/4) mile / 4.751 seconds		miles/hour	189.43380341 miles / hour
pi (4.7 cm)^2 sin(41 deg)		mm^2	4552.9041288 millimeters^2
50 meters * 25 meters * 10 ft		imperial gallons	8.3808283602 * 10^5 gallons-UK
(2000 V/m) * 35 cm * 2 elementary-charges		eV	1400 electron-volts

The "From" Entry

Enter the units or the mathematical expression with units that you want to convert. This can be as simple as a unit name or as complex as a formula involving additions, subtractions, multiplications, divisions, powers, square roots, and scientific functions (sin, cos, tan, arcsin, arccos, arctan, sinh, cosh, tanh, log, ln, and exp). The expression entry is very flexible; try typing an expression as you would normally write it.

Feature		Example	Interpretation
		Expression Features
Abbreviations are supported (see the name index).	ft		foot
Abbreviations are supported (see the name index).	m		meter
Standard metric power prefixes are supported.	millisecond		0.001 seconds
Standard metric power prefixes are supported.	kilometer		1000 meters
Scientific notation is supported	4.2 * 10^-3		0.0042
	4.2e-3		0.0042
	2 * 10^3		2000
	2e3		2000
"^" is the power operator.	4^2		16
	mile^2		mile mile
	second^-1		1 / second
sqrt is the square root function.	sqrt(4 m^2)		2 meters
sqrt is the square root function.	sqrt(-37)		(not supported)
sin, cos, tan, arcsin, arccos, arctan, sinh, cosh, tanh, log, ln, and exp represent their respective scientific functions. A trig function argument without units is considered to be in radians but you can also use units such as deg with function arguments.	cos(pi/3)		0.5
	cos((pi/3) rad)		0.5
	cos(60 deg)		0.5
	sin(100 grad)		1.0
	tan(800 mil)		1.0
"*" or a space between expressions represents the multiply operator. However, if the expressions are simple and have the same dimensions, a space is treated as an addition (which is common with written expressions).	(4 * 5) grams		20 grams
	3 newtons * 2 meters		6 newton meters
	5ft 45lbf		225 foot pounds-force
	6ft 4in		6 feet + 4 inches
	2hr 37min		2 hours + 37 minutes
Modifiers square, sq, squared, cubic, cu, cubed, and reciprocal have their normal meaning.	square meter		meter^2
	sq yard		yard^2
	second squared		second^2
	cubic inch		inch^3
	cu yd		yard^3
	cm cubed		centimeter^3
	reciprocal second		1 / second
In general, a "-" connecting names is treated the same as a space. If you need a subtraction operator or negative sign involving just unit names, put at least one space around the "-".	kilogram-meter/second^2		kilogram meter/second^2
	kg - lb		(subtraction)
	cubic-yard		yard^3
	cubic -yard		(-yard)^3
Sometimes a "-" is used to distinguish a unit name from an expression with the same words.	kilogram-calorie		the unit kilocalorie
	kilogram calorie		a mass times an energy

The "To" Entry

An expression for the "To" entry typically involves only units that are combined with multiplications, divisions, and powers. However, it is possible to use more general expressions like those for the "From" entry. Consider these special examples:

	Special "To" Entry Examples
	From	To	Result	Problem Solved
32 ft		15 in	25.6 * (15 inches)	How many 15 inch stones will fit along a 32 foot path? Answer: 25.6
17000 miles/hour		c	2.534980383 * 10^-5 speed-of-light-in-vacuum	What fraction of the speed of light is this space ship traveling? Answer: 2.534980383 * 10^-5

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Convert to New Units

Help Information

Examples

From

To

Result

The "From" Entry

Expression Features

Feature

Example

Interpretation

Abbreviations are supported (see the name index).

Standard metric power prefixes are supported.

Scientific notation is supported

"^" is the power operator.

sqrt is the square root function.

sin, cos, tan, arcsin, arccos, arctan, sinh, cosh, tanh, log, ln, and exp represent their respective scientific functions. A trig function argument without units is considered to be in radians but you can also use units such as deg with function arguments.

"*" or a space between expressions represents the multiply operator. However, if the expressions are simple and have the same dimensions, a space is treated as an addition (which is common with written expressions).

Modifiers square, sq, squared, cubic, cu, cubed, and reciprocal have their normal meaning.

In general, a "-" connecting names is treated the same as a space. If you need a subtraction operator or negative sign involving just unit names, put at least one space around the "-".

Sometimes a "-" is used to distinguish a unit name from an expression with the same words.

The "To" Entry

Special "To" Entry Examples

From

To

Result

Problem Solved