💱 Currency & Finance

Mortgages, loans, savings, salary, tax, property and crypto — the calculations that decide what something actually costs over its full term rather than what the monthly figure suggests.

The most useful thing most of these do is separate a headline number from a total. A monthly payment is a number a lender chooses to show you; the interest you pay across the whole term is the number that tells you what the borrowing cost. The amortization schedule generator prints that month by month.

Every tool here runs locally in your browser. Nothing about your salary, balance, or loan is transmitted or stored. Currency and crypto figures come from public APIs, and where a tool shows a stored figure instead of a live one it says so on the page.

Where to start

• Mortgage Calculator — Monthly payment plus the total interest across the term, which is the figure that actually matters.
• Loan & Mortgage Amortization Schedule — Prints every payment, showing how little of an early payment touches the principal.
• Compound Interest Calculator — Handles different compounding frequencies properly rather than assuming annual.
• Rent vs Buy Real Estate Calculator — Includes the costs of owning that a simple payment comparison leaves out.
• Salary & Tax Calculator — Works from gross to actual take-home rather than quoting a marginal rate.
• Rule of 72 Compound Interest Calculator — The fastest sanity check on any growth claim — and shows where the approximation breaks.

All currency & finance (57)

Frequently asked questions