Unit Conversions and Calculators

Select a category from the list below to view the related resources.

General Financial Scientific XXIV = 24


This site has conversions and calculations for temperature, gas mileage, speed, time, engergy and even butter!
This site offers a comprehensive collection of online calculators for a variety of purposes: finance, business, science, and medicine. In addition, there are conversion programs for currency, time, and units of measure.
A Dictionary of Units
This site provides a summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the S.I.
A Dictionary of Weights, Measures, and Units
This comprehensive dictionary provides clear definitions of all the units, prefixes, and styling of the Syst�me International (SI), as well as industry-specific and traditional terms currently in use.
This aptly named site is a continuously expanding collection of converters, units and measures, and data tables for researchers, scientists, and engineers. Chemical and physical data tables are featured, along with links to related sites.
Measure 4 Measure
This site is a collection of pages on the WWW that estimate, calculate, evaluate, and translate--from one quantity into another. Categories covered include science, mathematics, health, and finance.
This extraordinarily comprehensive site of weights, measures, and units conversion/calcuation modules allows users to answer nearly any question about unit equivalencies. How many units are in a chaldron? How many nanometers make up an inch? The answers are all here.

AIER Cost-of-Living Calculator
Sponsored by the American Institute for Economic Research, this site provides comparative cost-of-living data from 1913 to the present (using the Consumer Price Index). Other sites providing both current and historical information about inflation, prices, and cost-of-living include: The Inflation Calculator, Consumer Price Indexes (Bureau of Labor Statistics), and Inflation Conversion Factors.
This site features calculators and other data comparison devices form personal investing, saving, and banking.
Forbes Toolbox
This site offers a wide variety of financial calculators for both personal and business applications. Categories include retirement, asset allocation, investing, savings, mortgages, and insurance. See also Kiplinger.com Calculators and The Hedgehog's Calculators for similar services.
This site provides calculators and other resources for anyone seeking to purchase a home or relocate, including information on comparative cost of living indexes by location.
OANDA: The Currency Site
Just about everything you might want to know about currency conversion and exchange rates is here, including historical data for a variety of currency and exchange trends.
Universal Currency Converter
This site permits interactive foreign exchange rate conversion.

Fundamental Physical Constants
Supported by the National Institute of Standards and Technology, this site provides a wealth information about physical constants, including correlation coefficients between any pair of constants.
Online Conversion
Convert just about anything to anything else. Over 5,000 units, and 30,000 conversions.

Roman Numeral Converters
Fundamental Physical Constants
This site is intended as a guide to deciphering Roman numeral year dates as they are commonly found in the imprints of both modern and early printed books.
Roman Numeral Converter
Just what the site title claims.