Financial Calculators
Every financial calculator on the site, in one place — mortgages, loans, interest, retirement, tax, and budgeting tools, grouped by what you're actually trying to figure out.
Money formulas are simple in theory and easy to get wrong by hand — forget to divide an annual rate by 12 before applying it monthly, and a mortgage estimate can be off by tens of thousands of dollars over 30 years. Every calculator below runs the real formula instantly as you type, shows its work, and never sends what you enter anywhere. Jump to a section, or scroll through all 32.
Mortgages & home buying
Everything for planning, comparing, and paying down a home loan.
- Mortgage Calculator — your monthly principal-and-interest payment from a home price, down payment, rate, and term.
- Home Affordability Calculator — works backward from your income and debts to estimate a realistic maximum home price.
- Down Payment Calculator — how much you need to save for a target home price, and how long it'll take.
- Refinance Calculator — compares your current loan to a new rate and finds the break-even point on closing costs.
- Mortgage Payoff Calculator — shows how much time and interest an extra monthly payment actually saves.
- Amortization Schedule Calculator — a full year-by-year table of principal, interest, and remaining balance.
- Rent vs. Buy Calculator — compares the long-term net worth impact of renting versus buying.
Loans & borrowing
Beyond mortgages — vehicle, education, and general-purpose loans.
- Loan Calculator — a general-purpose fixed-rate loan calculator that works for almost any personal loan.
- Auto Loan Calculator — monthly payment and total interest for financing a vehicle.
- Student Loan Calculator — standard fixed-repayment estimate for a student loan balance.
- APR Calculator — reveals the true annual cost of a loan once upfront fees are factored in, not just the stated rate.
Debt management
Tools for paying down what you already owe.
- Credit Card Payoff Calculator — how many months it'll take to clear a balance at a fixed monthly payment.
- Debt Payoff Calculator (Snowball) — enter multiple debts and see the fastest payoff order and timeline.
- Debt-to-Income Ratio Calculator — the percentage lenders use to judge how much more debt you can reasonably take on.
Saving & investing
Growing money over time, from a simple savings account to the market.
- Compound Interest Calculator — how a lump sum grows when interest earns interest on itself.
- Interest Rate Calculator — the rate needed to grow a starting amount into a target amount.
- Simple Interest Calculator — interest calculated only on the original principal, used by some short-term loans and bonds.
- Savings Calculator — works backward from a savings goal to tell you the monthly amount needed to reach it on time.
- CD Calculator — the maturity value of a fixed-term certificate of deposit.
- Investment Calculator — projects a starting amount plus regular contributions at an assumed rate of return.
- Rule of 72 Calculator — a quick mental-math shortcut for how many years it takes money to double.
- Emergency Fund Calculator — your target safety-net size, and how long it'll take to build it.
- Gold Calculator — the value of gold jewelry or bullion from its weight and purity.
Retirement
Planning for the decades after you stop working.
- Retirement Calculator — projects your nest egg from today's age to retirement age, based on savings and contributions.
- 401(k) Calculator — the same projection, framed around a workplace plan with an employer match.
Income, tax & budgeting
Understanding what you earn, what you keep, and where it goes.
- Income Tax Calculator — a 2026 US federal tax estimate based on your income and filing status.
- Salary Calculator — converts pay between hourly, weekly, monthly, and annual figures, with a rough take-home estimate.
- VAT Calculator — adds or extracts value-added tax from a price, with common European rates for reference.
- Budget Calculator (50/30/20) — splits your after-tax income into needs, wants, and savings.
- Net Worth Calculator — everything you own minus everything you owe, in one number.
- Inflation Calculator — what today's money will need to grow to in order to keep the same purchasing power.
- VA Disability Calculator — your combined VA disability rating from individual ratings, using the official method.
Frequently asked questions
Are these financial calculators actually free?
Yes — all 32 tools on this page are free, with no account, subscription, or usage limit.
Which calculator should I start with?
Start with the decision you're actually facing, not the tool name — buying a home points to the Mortgage and Home Affordability calculators; getting out of debt points to Credit Card Payoff or Debt Payoff. The section headings above group tools by the situation they solve.
Do you store any of the numbers I enter?
No. Every calculation runs directly in your browser — nothing you type is sent to a server or saved anywhere.
Are the results accurate enough to rely on?
Each tool uses the standard, published formula for its purpose, shown directly on the page so you can check it yourself. For decisions with real financial consequences, confirm the specifics with a bank, lender, accountant, or financial advisor before acting.
Looking for a different category? Browse all calculators on the homepage.
For in-depth guides, walkthroughs, and updates about these tools — including The Complete Guide to Financial Calculators — see all Financial Calculators articles and posts. This list updates automatically as new posts are published under this topic.