Currency Converter
Convert between 39 world currencies using daily central bank rates
Use Calculator →Financial Calculators
Financial calculators using standard formulas from established sources. Calculate loan payments, plan for retirement, and track investment growth—all processed locally in your browser for complete privacy. Your financial data never leaves your device.
With these tools you can compare mortgage scenarios to find optimal loan terms, project investment growth with compound interest, plan credit card payoff strategies using the avalanche or snowball methods, and budget with the 50/30/20 rule (popularized by Senator Elizabeth Warren in "All Your Worth," 2005). Whether you are buying a home, paying down debt, or saving for retirement, these calculators help you make informed decisions.
Our loan calculators use the standard amortization formula M = P[r(1+r)^n]/[(1+r)^n-1], the same formula used by banks and mortgage lenders. Investment calculators apply compound interest with configurable compounding frequencies (daily, monthly, quarterly, annually). All results match what you would get from a bank or financial advisor. Tax implications are not included as they vary by jurisdiction and individual circumstances.
Currency & Exchange
Currency conversion tools with live exchange rates
Loans & Debt
Mortgage, loan, and debt payoff calculators
Credit Card Payoff Calculator
Calculate how long it will take to pay off your credit card debt.
Use Calculator →Debt Payoff Planner
Compare the snowball and avalanche methods across all your debts to see which clears them faster and for less interest.
Use Calculator →Loan Payment Calculator
Calculate monthly loan payments, total interest, and amortization schedules.
Use Calculator →Mortgage Amortization Calculator
Generate complete amortization schedules with extra payment analysis.
Use Calculator →Mortgage Prepayment Calculator
Compare prepaying your mortgage vs investing the extra funds.
Use Calculator →Target Date Payment Calculator
Calculate the monthly payment needed to pay off your loan by a specific date.
Use Calculator →Investments & Retirement
Investment growth, ROI, and retirement planning tools
Compound Interest Calculator
Calculate how investments grow with compound interest over time.
Use Calculator →Investment ROI Calculator
Calculate your rate of return on any investment — ROI percentage, annualized returns (CAGR), and net profit analysis.
Use Calculator →Retirement Calculator
Plan your retirement savings and check if you're on track.
Use Calculator →Targeted Savings Calculator
Find your savings contribution, timeline, or achievable goal. Multiple frequencies, inflation adjustment, and quick presets.
Use Calculator →Budget & Planning
Budgeting tools and financial planning calculators
Home Maintenance ROI Calculator
Calculate how much proactive home maintenance saves in repair costs, insurance, asset life, and resale value.
Use Calculator →Rent vs. Buy Calculator
Compare the true cost of renting vs. buying a home.
Use Calculator →Business Documents
Create invoices, estimates, and business documents
Estimate & Invoice Generator
Create professional invoices and estimates with automatic calculations
Use Calculator →Frequently Asked Questions
How is loan interest calculated?
Most consumer loans use amortization, where each monthly payment covers both interest and principal. The monthly payment is calculated using the formula M = P[r(1+r)^n]/[(1+r)^n-1], where P is the principal, r is the monthly interest rate, and n is the number of payments. This is the standard formula used by banks and financial institutions.
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. The formula is A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounding frequency, and t is time in years. Albert Einstein reportedly called it the eighth wonder of the world due to its exponential growth effect on savings and investments.
Is my financial data kept private?
Yes, all financial calculations run entirely in your browser. No financial information—including income, debts, savings, or investment amounts—is ever transmitted to any server. No account is required and no data is collected.
What is the difference between APR and interest rate?
APR (Annual Percentage Rate) includes both the interest rate and certain fees such as origination fees and closing costs, giving a more complete picture of total borrowing costs. The Truth in Lending Act (TILA), a U.S. federal law, requires lenders to disclose APR so borrowers can compare offers on equal terms. A lower APR means a lower total cost of borrowing. Our loan calculators use the nominal interest rate for monthly payment calculations and display the total cost of borrowing over the life of the loan.
What are the debt snowball and avalanche methods?
The snowball method, popularized by financial author Dave Ramsey, pays off the smallest balance first regardless of interest rate, providing quick psychological wins that build momentum. The avalanche method targets the debt with the highest interest rate first, which saves more money in total interest over time. Both methods require making minimum payments on all debts while directing extra payments to the target debt. Our credit card payoff calculator compares both strategies side by side, showing total interest paid and payoff timeline for each approach so you can choose what works best for you.