Free financial calculators, with the math shown

Simple tools for everyday money questions. No signup, no tracking of your numbers — every calculation runs right here in your browser, and every formula is printed on the page.

Saving & Growth

Compound Interest Calculator See how your savings grow over time with compound interest and regular monthly contributions.

Home & Housing

Mortgage Payoff Calculator See your monthly payment, total interest, and payoff date - and how much time and interest an extra monthly payment saves.
Rent vs. Buy Calculator Compare the true 10-year cost of renting and buying - including the opportunity cost of your down payment that most calculators skip.

Everyday Money

Debt & Loans

Debt Payoff Planner Compare snowball and avalanche payoff plans for up to five debts: payoff order, total interest, and your debt-free date.

What this site is

ZizzoMoney is a set of free educational calculators. It never gives individualized financial advice, never asks for your accounts, and never stores what you type. If you want to know more about who runs it and how the numbers are checked, read the About page.