Finance Calculators

These finance calculators will help you plan your future.

Money decisions involve numbers that don't behave the way intuition expects. A small change in interest rate compounds into thousands of dollars over the life of a mortgage. A 1% bump in your savings rate shifts your retirement age. Paying only the minimum on a credit card balance can mean paying interest for over a decade.

These finance calculators answer the math precisely — so you can compare a 15-year against a 30-year mortgage, see exactly how compound interest builds savings, work out what your salary becomes after taxes, or run debt payoff scenarios side by side. Each tool runs instantly in your browser, is free to use, and shows full breakdowns including amortization schedules where relevant. Browse by category below, or start with one of the most-used tools above.

Income / Profit

Retirement & Investing

Expenses / Debt

Credit Cards

Tax & Payroll

Housing

Loans

Prices / Discounts

FAQs

APR (Annual Percentage Rate) is the simple interest rate charged or paid over a year. APY (Annual Percentage Yield) reflects what you actually earn or pay once compounding is factored in. APY is always equal to or higher than APR — for savings accounts that compound daily or monthly, the gap can be meaningful over time.

A 15-year mortgage costs significantly less in total interest but has higher monthly payments. A 30-year mortgage is more affordable per month but you pay considerably more interest overall. The right choice depends on monthly budget headroom, how long you plan to stay in the home, and what else you'd do with the savings difference.

A common starting point is 10-15% of gross income, but the precise figure depends on your target retirement age, expected expenses, and any existing savings or pensions. Modeling your specific situation with a retirement or FIRE calculator gives a more useful answer than rules of thumb.

Mathematically, paying the card with the highest interest rate first (the 'avalanche' method) saves the most money. Some people prefer paying the smallest balance first (the 'snowball' method) because the early wins keep motivation up. Either approach beats only paying the minimum, which can extend repayment past 20 years.

They use the same standard financial formulas that banks, mortgage brokers, and accountants use, so they're suitable for planning and comparison. For binding decisions like loan applications or tax filings, confirm the final numbers with your lender or a qualified professional — actual products may include fees, insurance, or terms not captured by a general calculator.