Units of Measurement. For information on a specific unit, click on the first letter of its name: Commentary and Explanation The International System of Units (SI) The International System of Units Base and derived units; other units included (and some that are not included). Defining the Base Units Current and proposed definitions for the second, meter, kilogram, ampere, mole, kelvin, and candela. SI Derived and SI Compatible Units 22 derived units that are in the SI, and 10 more that aren't. Metric and SI Unit Prefixes From yotta- (septillion) to yocto- (septillionth). Using Numbers and Unit Symbols in Measurements SI rules for numbers (decimal markers, digit grouping, etc.) and the SI rules for handling unit symbols. The Long Road to the SI English Customary Weights and Measures A brief account of a long (but fascinating) history. The Metric System A new idea -- now more than 200 years old. CGS and MKS Units Two contending coherent unit systems.
The Metric System in the United States Names of Large Numbers Meter? Intensity Indicators: Terminology and Definitions. Engineering & Scientific Links - Calculators. Periodic Table of Elements: Los Alamos National Laboratory. Convert just about anything to anything else. Calculations and References | Clean Energy. This page describes the calculations used to convert greenhouse gas emission numbers into different types of equivalent units. Go to the equivalency calculator page for more information. A note on global warming potentials (GWPs): Some of the equivalencies in the calculator are reported as CO2 equivalents (CO2E). These are calculated using GWPs from the Intergovernmental Panel on Climate Change’s Fourth Assessment Report.
Electricity Reductions (kilowatt-hours) The Greenhouse Gas Equivalencies Calculator uses the Emissions & Generation Resource Integrated Database (eGRID) U.S. annual non-baseload CO2 output emission rate to convert reductions of kilowatt-hours into avoided units of carbon dioxide emissions. Most users of the Equivalencies Calculator who seek equivalencies for electricity-related emissions want to know equivalencies for emissions reductions from energy efficiency or renewable energy programs. Emission Factor Notes: Sources Gallons of gasoline consumed Calculation Calculation 1.