About this tool

Quick Tools is a free collection of 70 single-purpose calculators that run on your own device. Open one, type the numbers, get the answer. No account, no email, nothing uploaded. The credit card payoff tool is a good example—plug in balance, APR, and a fixed payment and it tells you months to zero, the payoff date, and total interest. There's an optional extra-payment field if you want to see how much faster you'd finish. The rest of the finance side covers raises, loans, CDs, HELOCs, mortgages, margin, markup, discounts, and break-even. Day-to-day stuff includes work hours (with breaks and ov