Guides
Original articles on the decisions behind the calculators — not just the formulas.
Every tool on this site explains the formula it uses. These guides go a step further: they walk through a real decision — how much house to buy, whether a BMI number means what you think it means, whether a longer car loan term is actually a good idea — in more depth than a single calculator page can.
How Much House Can You Actually Afford?
A lender will approve you for more than you should spend. Here is how to find your own number.
Why Your BMI Number Might Be Misleading You
BMI measures a ratio, not your health. The difference matters more than most BMI calculators let on.
The Real Cost of a 72-Month Car Loan
The lower payment is real. So is the extra interest and the longer stretch of owing more than the car is worth.