Why these tools
They fall into four groups people run into at different moments. Numbers to words, words to numbers, and currency to words solve the same underlying problem — turning digits into the exact words a document, bank, or contract requires. The loan, auto loan, mortgage, and debt payoff calculators handle borrowing and paying down debt. Discount, percentage, compound interest, and the savings goal calculator handle everyday money math and building savings. The salary calculator and both tax calculators handle the other side of money: what you actually take home, and the Financial Calendar tracks the deadlines those tax and contribution numbers have to be filed and paid by. Every tool runs entirely in your browser — nothing you type is sent anywhere.
New to some of these terms? The Financial Glossary defines every term used across these calculators in plain English, from APR to marginal tax rate. Not sure where to start? Which Calculator Do I Need? matches your actual situation to the right tool. And every number is sourced — the Methodology & Sources page lists exactly what backs each calculator.