Personal Finance Calculators
Plan mortgages, savings goals, and investment returns.
230 free calculators
Your Money, Quantified
Every major financial decision comes down to numbers you can run before you commit. Whether you're figuring out how much house you can actually afford, splitting rent fairly with roommates, or working backward from a paycheck to understand your annual income, these tools turn vague money stress into concrete answers.
Where to Start
Most people land here with a specific question. If you're buying a home, the car affordability calculator and discount point calculator help you understand what fits your budget before you talk to a lender. For everyday spending, the reverse sales tax calculator shows you the pre-tax price of anything, and the rent split calculator handles the awkward roommate math so you don't have to.
Beyond the Basics
The personal finance calculators here go deeper than simple arithmetic. Retirement planning, debt payoff timelines, and investment compounding all involve formulas that are tedious to do by hand but easy to explore when you can tweak inputs and see results instantly. Pair these with our business finance tools if you're self-employed, or check the math & numbers section for percentage and ratio calculators that come up constantly in financial planning.