# Angle Conversion Calculators Convert one unit of angle to another. Start by selecting the angle unit to convert from.

## What is Angle?

a measure of an angle or of the amount of turning necessary to bring one line or plane into coincidence with or parallel to another. Put another way, angle is the amount that one line or plane is turned from another.

Angles are used in geometry and trigonometry, geography and mapping, and construction, so understanding how to work with angles can be very important. A protractor is a common tool to help calculate angle between two lines.

Two common measures of angle are degrees and radians. A full circle consists of 360 degrees, meaning a line is 360 degrees from itself, which is 2π in radians. Angles are measured using a protractor, learn how to use a protractor or download a printable protractor to use to measure an angle for your project.

Use our unit conversion tools above to convert between the different units of angle measures.

## Units of Angle Measurement

Units of angle include radians, milliradians, degrees, minutes of arc, seconds of arc, gradians, revolutions, circles, and mils (NATO).

## Common Angle Measurement Conversions

1 degree is equal to 0.017453 radians
1 degree is equal to 1.111111 gradians
1 radian is equal to 57.29578 degrees
1 gradian is equal to 0.9 degrees
Degrees to mils (NATO) angle conversion
1 degree is equal to 17.777778 mils (NATO)

## Angle Unit Conversion Table

Equivalent metric and imperial angle measurements