Browser-based financial calculators for investors, homeowners, students, and business owners. Calculate loan payments, compound interest, retirement corpus, ROI, tax liability, and more. Every tool shows its formula.
Calculate monthly loan payments, total interest, and full amortization schedule. Uses the standard formula: M = P × [r(1+r)^n] / [(1+r)^n - 1]. Supports any loan type — personal, auto, student. Enter principal, annual rate, and term to see monthly payment, total cost, and a year-by-year breakdown of principal vs interest allocation. Includes early payoff savings calculator.
calculateMonthly mortgage payment including principal, interest, property tax, PMI, and insurance. Full amortization schedule.
calculateEquated Monthly Installment calculator. Principal, rate, tenure → monthly EMI with total interest and payable amount.
calculateAuto loan monthly payment calculator. Includes trade-in, down payment, sales tax, and interest rate inputs.
calculateCalculate time to pay off credit card balance. Shows interest saved by paying more than minimum. Avalanche and snowball methods.
calculateCalculate savings from refinancing a loan. Break-even point, closing costs recovery, and total interest saved over new term.
calculateCalculate Annual Percentage Rate including fees. True cost of borrowing — not just nominal interest rate. Truth in Lending compliant.
calculateCalculate DTI ratio for mortgage qualification. Front-end and back-end ratios per Fannie Mae and FHA lending guidelines.
calculateCalculate investment growth with compound interest using A = P(1 + r/n)^(nt). Enter principal, annual rate, compounding frequency (daily, monthly, quarterly, annual), and time horizon. Shows total value, interest earned, and year-by-year growth breakdown. $10,000 at 7% for 10 years = $19,672.
calculateCalculate simple interest: I = P × r × t. No compounding — interest earned only on original principal. Short-term loan reference.
calculateSystematic Investment Plan returns calculator. Monthly contribution, expected return, duration → maturity value with inflation adjustment.
calculateOne-time investment growth calculator. Enter amount, expected return, duration → future value with and without inflation.
calculateReturn on Investment calculator. (Gain - Cost) / Cost × 100. Annualized ROI for multi-year investments. Handles negative returns.
calculateNet Present Value calculator. Discount future cash flows at a given rate. NPV > 0 means profitable investment. Up to 20 periods.
calculatePresent Value of a future amount. PV = FV / (1+r)^n. Time value of money — what $10,000 in 10 years is worth today.
calculateFuture Value of current investment. FV = PV × (1+r)^n. What $5,000 grows to at 8% over 20 years: $23,305.
calculateCalculate retirement corpus needed using the 4% safe withdrawal rate rule. Enter current age, retirement age, monthly expenses, life expectancy, and pre/post-retirement return rates. Shows required monthly investment, projected corpus, and whether you're on track. Accounts for inflation at 3-6% during accumulation and distribution phases.
calculateProject 401(k) growth with employer match. Contribution limits, catch-up contributions, and tax-deferred growth calculation.
calculateHow long to reach a savings target. Enter goal amount, current savings, monthly contribution, and interest rate.
calculateCalculate monthly savings needed for a home down payment. Target home price, down payment %, timeline → monthly savings required.
calculateCalculate future purchasing power. $100 today at 3% inflation = $74 in 10 years. Historical CPI data from BLS.
calculateAnnual Percentage Yield from nominal rate and compounding frequency. APY = (1 + r/n)^n - 1. Compare savings accounts effectively.
calculateEstimate income tax liability. Federal brackets, standard deduction, marginal and effective rate. 2025-2026 tax year.
calculateAdd or remove GST/VAT from any amount. Supports 5%, 12%, 18%, 28% (India GST) and custom rates for any country.
calculateConvert between annual, monthly, biweekly, weekly, daily, and hourly. Accounts for unpaid time off and overtime.
calculateConvert hourly wage to annual salary. $25/hr × 2080 hours = $52,000/year. Includes overtime and double-time calculations.
calculateCalculate net worth: total assets minus total liabilities. Tracks cash, investments, property, debts, and loans in one view.
calculateCalculate the break-even point where total revenue equals total costs. Enter fixed costs, variable cost per unit, and selling price per unit. Shows break-even units, break-even revenue, and contribution margin ratio. Essential for pricing strategy, product launch decisions, and business plan financial projections.
calculateCalculate selling price from cost and markup percentage. Markup = (Price - Cost) / Cost. Retail and wholesale pricing tool.
calculateCalculate profit margin from revenue and cost. Margin = (Price - Cost) / Price. Note: margin ≠ markup. 30% margin ≠ 30% markup.
calculateCalculate sale price from original price and discount percentage. Supports stacked discounts (20% off + additional 15% off).
calculateCalculate percentage increase or decrease between two values. QoQ, YoY growth rates. ((New - Old) / Old) × 100.
calculateCalculate tip and split the bill. Presets at 15%, 18%, 20%. Splits among any number of diners with per-person total.
calculateCompare the total cost of renting vs buying over a time horizon. Includes mortgage, property tax, appreciation, and opportunity cost.
calculateConvert between 150+ currencies using live exchange rates. Historical rate lookup and multi-currency comparison table.
convertCalcHQ offers 35 free finance and investment calculators that run entirely in your browser. Every calculation happens locally — no financial data is sent to servers, no accounts are required, no tracking scripts monitor your inputs. Whether you're calculating a mortgage payment, projecting compound interest growth, estimating retirement corpus, or computing ROI on a real estate investment, these tools provide instant results with transparent formulas.
Finance calculators apply time-tested financial formulas to user-provided inputs like principal, interest rate, time period, and payment frequency. The compound interest calculator uses the formula A = P(1 + r/n)^(nt), where A is the future value, P is principal, r is annual rate, n is compounding frequency, and t is time in years. The loan calculator uses the amortization formula M = P × [r(1+r)^n] / [(1+r)^n - 1] to compute monthly payments. The NPV calculator discounts future cash flows at PV = FV / (1+r)^n to determine if an investment is profitable.
Each tool follows the same architecture: input fields capture values, a JavaScript function executes the financial formula, and results render with full step-by-step explanation. The mortgage calculator computes monthly payment using the standard amortization formula, then adds property tax, PMI, and insurance to show total monthly housing cost. The retirement calculator projects corpus growth during the accumulation phase using compound interest, then tests sustainability using the 4% safe withdrawal rate rule established by William Bengen in his 1994 Journal of Financial Planning paper.
The ROI calculator computes simple return as (Gain - Cost) / Cost × 100, then annualizes it for multi-year investments using Annualized ROI = (1 + ROI)^(1/years) - 1. The break-even calculator divides fixed costs by contribution margin per unit to find the sales volume where profit equals zero — the critical threshold for business viability analysis.
Every calculator on this site runs client-side. Your browser downloads the HTML, CSS, and JavaScript once, then all financial calculations happen locally. The mortgage calculator never transmits your loan amount. The retirement calculator never uploads your salary. The tax calculator never sends your income data to a server. Open DevTools (F12), switch to the Network tab, and use any calculator — zero outgoing requests fire during computation.
These calculators provide informational estimates based on standard financial formulas and assumptions. They are not financial advice, investment recommendations, or guarantees of future returns. Actual loan terms, investment performance, and tax liabilities depend on factors not captured by these tools, including credit score, market conditions, regulatory changes, and individual circumstances. Always consult a licensed financial advisor, CPA, or loan officer before making financial decisions.
Use the search bar above to find a specific calculator, or scroll through the categories: Loan & Credit, Investment & Growth, Retirement & Savings, Tax & Income, and Business & Commerce.