Free Online Finance Calculators
Plan your mortgage, compare refinance offers, project investment growth, and convert salaries — with fast, private tools that run entirely in your browser.
Mortgage Calculator
Monthly payment with property tax, insurance, PMI and HOA, plus a full amortization schedule.
Calculate →Refinance Calculator
Compare your current loan to a new offer. Find your break-even month and lifetime savings.
Calculate →Home Affordability Calculator
Using the 28/36 rule, see the maximum home price your income and debts can support.
Calculate →Loan Calculator
Auto and personal loans: monthly payment, total interest, and amortization breakdown.
Calculate →Compound Interest Calculator
Project investment growth with monthly contributions and a visual growth chart.
Calculate →Percentage Calculator
What is X% of Y? X is what percent of Y? Percentage increase and decrease.
Calculate →Tip Calculator
Figure out the tip, split the bill, and see exactly what everyone owes.
Calculate →Salary Converter
Convert between hourly, weekly, biweekly, monthly and annual pay instantly.
Calculate →Why use EveryCalc?
Big financial decisions deserve better than back-of-the-envelope math. Whether you are buying your first home, weighing a refinance offer, or deciding how much to invest each month, a small error in your assumptions can cost thousands of dollars over time. EveryCalc gives you the same core formulas lenders and advisors use, packaged in tools that answer in seconds.
Every calculator on this site runs 100% in your browser. That means two things: your numbers are private — nothing is uploaded, stored, or tracked — and the tools are fast, working even on slow connections. There is no account to create and no paywall.
Start with the mortgage calculator if you are house hunting — it is our most popular tool and includes property tax, homeowner's insurance, PMI, and HOA so the monthly figure you see is the real one, not just principal and interest. If you already own, the refinance calculator tells you exactly when a new loan starts saving you money.
Frequently asked questions
Are EveryCalc calculators really free?
Yes. Every calculator is completely free with no account, no signup, and no limits.
Is my financial data private?
Yes. All calculations happen locally in your browser via JavaScript. We never see, store, or transmit the numbers you enter.
How accurate are the results?
We use standard financial formulas — the same amortization math banks use. Results are estimates for planning; a lender's final numbers may differ slightly due to fees, rounding, and day-count conventions.