 Dyne
Get Dyne essential facts below. View Videos or join the Dyne discussion. Add Dyne to your PopFlock.com topic list for future reference or share this resource on social media.
Dyne
dyne
Unit systemCGS units
Unit ofForce
Symboldyn
Conversions
CGS base units1 g?cm/s2
SI units
British Gravitational System2.248089×10-6 lbf

The dyne (symbol dyn, from Ancient Greek: ?, romanizeddynamis, lit.'power, force') is a derived unit of force specified in the centimetre-gram-second (CGS) system of units, a predecessor of the modern SI.

## History

The name dyne was first proposed as a CGS unit of force in 1873 by a Committee of the British Association for the Advancement of Science.

## Definition

The dyne is defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared". An equivalent definition of the dyne is "that force which, acting for one second, will produce a change of velocity of one centimetre per second in a mass of one gram".

One dyne is equal to 10 micronewtons, 10-5 N or to 10 nsn (nanosthenes) in the old metre-tonne-second system of units.

1 dyn = 1 g?cm/s2 = 10-5 kg?m/s2 = 10-5 N
1 N = 1 kg?m/s2 = 105 g?cm/s2 = 105 dyn
Units of force
newton
(SI unit)
dyne kilogram-force,
kilopond
pound-force poundal
1 N ? 1kg?m/s2 = 105dyn ? 0.10197kp ? 0.22481lbf ? 7.2330pdl
1dyn =10-5N ?1g?cm/s2 ?kp ?lbf ?pdl
1kp =9.80665N =980665dyn ?gn×1kg ?2.2046lbf ?70.932pdl
1 lbf ?4.448222N ?444822dyn ?0.45359kp ?gn×1lb ?32.174pdl
1pdl ?0.138255N ?13825dyn ?0.014098kp ?0.031081lbf ?1lb?ft/s2
The value of gn as used in the official definition of the kilogram-force is used here for all gravitational units.

## Use

The dyne per centimetre is a unit traditionally used to measure surface tension. For example, the surface tension of distilled water is 71.99 dyn/cm at 25 °C (77 °F). (In SI units this is or .)