Free, Online Calculators

Take the Drudgery Out of Statistical Computations

Computing probabilities, combinations, permutations, and factorials has never been easier. Simply click on the item that you want to use. Each online tool features clear instructions and examples; so you won't lose time getting up to speed.

A Brief History of Statistical Tables

Back in the 20th century, researchers relied on dense, hard-to-read tables to find probabilities associated with different sampling distributions. Typically, these tables were hidden in appendices at the back of statistics texts, and obtaining information was tedious. It involved aligning rows and columns to find the particular cell of the table that held the information you wanted. In the worst case, you had to interpolate. Human error was rampant.

Today, in the 21st century, everything is better. No more thumbing through textbooks to find the statistical table you need. No more hard-to-read tables. No more interpolation. With Stat Trek's online statistical tables, the information you need is just a mouse click away.

All-Purpose Mortgage Calculator

This free mortgage calculator will help you find the right mortgage, with the terms you want. The calculator works with virtually every mortgage option currently available: fixed-rate mortgages, adjustable-rate mortgages, balloon loans, interest-only mortgages, convertible ARMs, and graduated payment mortgages.

Use it to find monthly mortgage payment, compute total mortgage cost (before and after tax), compare two mortgages, find savings from mortgage prepayment, assess refinancing costs and benefits, and generate amortization tables.

Despite its versatility, this mortgage calculator is user-friendly. Online help is just a mouse click away. The calculator features context-sensitive help buttons, frequently-asked questions, sample problems, and an on-line glossary of financial terms.