Convert to Metric Units

From:

( Initial Units or Expression )

Result:

( Initial Value with Metric Units )

 

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Help Information

Examples

From

Result

foot

0.3048 meters

83 deg-F

28.333333333 degrees-Celsius

(6 * 18) mile^2

279.71871592 kilometers^2

70.4 kg + 115 lb

122.56312255 kilograms

(20ft + 2in) * (15ft - 8in)

26.85413984 meters^2

-16.2 + sqrt(16.2^2 - 4 * 3.1 * 0.7)

-0.27015379861

(5 qt + 2 gal) / 4.751 seconds

2.5894734368 liters / second

pi (4.7 cm)^2 sin(41 deg)

45.529041288 centimeters^2

50 meters * 25 meters * 10 ft

3810 meters^3

(2000 V/m) * 35 cm * 2 elementary-charges

224.30470818 attojoules

This calculator converts the "From" entry to the International System of Units (SI units) which is commonly called the metric system. The algorithm tries base, derived, and accepted metric units when seeking a concise metric equivalent. There are multiple ways to express a value in metric units, so the units returned here may not be in the form that you need.

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.

Expression Features

Feature

Example

Interpretation

Abbreviations are supported (see the name index).

ft

foot

m

meter

Standard metric power prefixes are supported.

millisecond

0.001 seconds

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(-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

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