Use the standard calculator or calculate loans, temperature, currency, time and more.
Dictionary of Units of MeasureConvert inches to meters, pounds to grams or find out about hat sizes, the Apgar Test and almost anything else you can measure.
Math.com"Math.com is dedicated to providing revolutionary ways for students, parents, teachers, and everyone to learn math." Covering everything from basic math to calculus, users will find homework help, practice quizzes, study tips and more on this website.
Measurements ConverterHere you can easily perform online conversions (e.g. metric conversions) for many measurement systems both commonly used like metric and U.S. Avoirdupois and quite exotic like Ancient Greek and Roman.
QuickMath"QuickMath is an automated service for answering common math problems over the internet. ...When you submit an algebra or calculus question to QuickMath, it is quickly answered and sent back. Problems may include factoring, graphing, quadratics, inequalities, basic calculus, matrices, and more.