Free Financial Calculators That Just Work

Kingo gives you fast, accurate calculators for loans, mortgages, investing, retirement and everyday money decisions. Every calculator runs entirely in your browser — nothing is uploaded, no account is needed, and there are no paywalls. Pick a calculator below and get your answer in seconds.

Loans & Mortgages

Mortgage Payment Calculator
Monthly payment, total interest and payoff cost for any home loan.
Loan Payment Calculator
Payment, interest and amortization for personal or business loans.
Auto Loan Calculator
Work out the true monthly cost of a car loan before you sign.
Credit Card Payoff Calculator
See how long your balance will take to clear — and what it really costs.

Investing & Growth

Compound Interest Calculator
Watch your money grow with regular contributions and compounding.
CAGR Calculator
Annualized growth rate between two values over any number of years.
Stock Profit Calculator
Net profit, return percentage and break-even for a stock trade.

Savings & Goals

Retirement Savings Calculator
Estimate your nest egg at retirement based on your current plan.
Savings Goal Calculator
How long until you hit your savings target with monthly deposits.
Percentage Calculator
Percentages, increases, decreases and percent change in one place.

Why use Kingo?

Most finance calculator sites bury the tool under ads, pop-ups and sign-up walls. Kingo does the opposite: the calculator is the page. Each tool loads instantly, works offline once loaded, and shows not just a headline number but the breakdown behind it — monthly payment versus total interest, principal versus growth, years versus months.

Every calculator also comes with a plain-English explanation of the math it uses, so you can check the numbers yourself or rebuild them in a spreadsheet. If you want to go deeper, each page links to related calculators that answer the natural next question — for example, the mortgage payment calculator pairs naturally with the loan payment calculator when you are comparing a 15-year versus 30-year term.

Start with one of the tools above, or jump straight to the most popular ones: compound interest, mortgage payment, and retirement savings.