Make confident money decisions
Buying a home, taking out a loan or negotiating a salary are among the largest financial decisions most people ever make — yet they usually hinge on a single number: the monthly payment. My Knowledge Dock exists to make that number transparent. Instead of relying on a lender’s headline figure, you can test scenarios yourself: what happens if rates rise by half a point, if you put 10% down instead of 20%, or if you refinance two years from now?
Our tools are designed for readers in the United States and the United Kingdom. Use the currency switcher on any calculator to view results in dollars or pounds. A few tools are country-specific — the salary calculator models US federal and state taxes, for example — and those pages say so clearly. Wherever figures are simplified or estimated, we label them as estimates.
How the calculators work
Each calculator is a small, self-contained program that runs entirely in your web browser. There is nothing to install and no account to create. Type in your numbers and the results update instantly, including detailed breakdowns such as year-by-year amortisation schedules and growth charts. Because nothing is sent over the internet, you can use the tools offline once the page has loaded — and your financial details stay on your device.
Home buying
Home buying
Paychecks