Wind Systems

Towers, turbines, gearboxes; processes for shaping and finishing component parts.

NASA Tech Briefs

Innovations developed by NASA and its industry partners in a wide array of fields.

Power Transmission

Gear drives, bearings, motors, clutches, couplings, machine controls, sensors and components.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

more free magazines
Glossary » Units » Fraction » Part Per Billion
Part Per Billion (ppb) is a unit in the category of Fraction. It is also known as parts per billion. This unit is commonly used in the INT unit system. Part Per Billion (ppb) has a dimension of nil (fraction) where L is length, T is time, N is amount of substance, and I is electric current. It can be converted to the corresponding standard SI unit by multiplying its value by a factor of 1E-009.
Note that the seven base dimensions are M (Mass), L (Length), T (Time), Q (Temperature), N (Aamount of Substance), I (Electric Current), and J (Luminous Intensity).

Other units in the category of Fraction include Carat (karat) (ct, Kt), Part Per Hundred (pph, %), Part Per Hundred Million (pphm), Part Per Hundred Thousand (ppht), Part Per Million (ppm), Part Per Quadrillion (ppq), Part Per Tera (ppt), and Part Per Thousand (ppt).

Additional Information
N/A
Related Pages
Glossary