Finance calculators
Loan EMI and mortgage payments, compound interest, SIP and retirement plans, NPV and IRR, bond yields, option prices and income tax for India, the US and the UK, with full schedules and charts.
49 calculators, 291 checked worked examples.
Find the right calculation
Money
Loans
- Auto loan calculator
Auto loan calculator: monthly car payment with trade-in, amount owed, sales tax and fees, total interest, a payment schedule, or the price a budget buys.
- House affordability calculator
Find how much house you can afford: the highest home price whose payment, tax, insurance, HOA and PMI fit the 28% and 36% debt-to-income limits.
- Loan EMI calculator
Calculate the EMI on a home, car or personal loan, the total interest, and a month-by-month amortization schedule with prepayments.
- Mortgage calculator
Estimate your monthly mortgage payment with property tax, insurance, HOA and PMI, plus the amortization schedule and savings from extra payments.
- Amortization schedule calculator
Amortization calculator: payment, dated schedule and yearly totals for monthly, biweekly or weekly payments, with principal and interest in each.
- APR calculator
Calculate a loan's APR with fees by the Regulation Z actuarial method, the amount financed, the finance charge and the effective annual rate.
- Canadian mortgage calculator
Canadian mortgage payment with semi-annual compounding, accelerated bi-weekly or weekly options, the CMHC insurance premium and the balance at renewal.
- Car lease payment calculator
Calculate a monthly car lease payment from the price, residual value and money factor or APR, split into depreciation, finance charge and tax.
- Credit card payoff calculator
Calculate how long a credit card balance takes to pay off on minimum payments versus a fixed monthly payment, and the interest each costs.
- Debt consolidation calculator
Debt consolidation calculator: compare your debts with one loan — monthly payment, total interest, payoff time, APR with fees and the break-even rate.
- Debt snowball vs avalanche calculator
Compare the debt snowball (smallest balance first) and avalanche (highest rate first): months to debt-free, total interest and payoff order.
- Debt-to-income ratio calculator (DTI)
Calculate your debt-to-income ratio (DTI), front-end and back-end, against lender limits, and the debt cut or income rise that reaches your target.
- Down payment calculator
Down payment and closing costs you need, how long your savings take to reach them (or the monthly saving needed), and the PMI cost below 20% down.
- FHA loan calculator
FHA loan payment with the 1.75% upfront MIP, the annual MIP from HUD's current table, taxes and insurance, and a check against your county's 2026 loan limit.
- HELOC and home equity calculator
Home equity you can borrow at your lender's CLTV limit, and HELOC payments in the interest-only draw period and the repayment period, or a fixed home equity loan.
- Loan affordability calculator
Find how much you can borrow from the monthly payment you can afford at your rate and term, and the price your down payment then buys.
- Mortgage payoff calculator
Mortgage payoff calculator: new payoff date, months and interest saved by extra monthly, yearly or one-time payments, or the extra to finish by a date.
- Refinance calculator
Compare refinancing at your planned sale or payoff month. See payments, closing costs, remaining balances and savings with cash or financed fees.
- Student loan calculator
Student loan calculator: payment, total interest and payoff date on the federal standard, tiered or extended plan or a custom term, with extra payments.
- VA loan calculator
VA loan payment with the VA funding fee from the current table (first or later use, by down payment), the financed loan amount, taxes and insurance.
Interest & growth
- Compound interest calculator
Calculate compound interest: the future value of a deposit plus regular contributions at any compounding frequency, including daily and continuous.
- SIP calculator
Calculate SIP returns: the maturity value of a monthly mutual fund SIP with an optional yearly step-up, or the SIP needed to reach a goal.
- Time value of money calculator (future and present value)
Solve for the future value, present value, interest rate or time of a lump sum from the other three, with any compounding, including continuous.
- Annuity calculator (growth and payout)
Calculate an annuity's future value from regular payments, the payout a lump sum buys over N years, or how long it lasts at a set withdrawal.
- CD calculator
Calculate CD interest and maturity value from the APY or APR and compounding, convert APY to APR, and see what an early withdrawal penalty costs.
- Inflation calculator (future cost and purchasing power)
Calculate what a purchase will cost after inflation, what your money will still buy, and your real return after inflation.
- Savings goal calculator
Calculate how much to save each month to reach a savings goal by a date, or how long a monthly deposit takes to get there, with interest.
- Simple interest calculator
Calculate simple interest (I = P × r × t) and the maturity amount on a principal for a term in years, months or days.
Income
- Paycheck calculator
Calculate US take-home pay per paycheck and per year: 2026 federal withholding (IRS Pub. 15-T), Social Security, Medicare, state tax and deductions.
- Salary to hourly calculator
Convert an annual salary to an hourly wage or hourly pay to salary, plus daily, weekly, biweekly, semimonthly and monthly pay.
- Commission calculator
Calculate sales commission at a flat or tiered rate, total pay with base salary, the effective rate, and the sales needed to earn a target commission.
Investing
- NPV and IRR calculator (with MIRR and payback)
Calculate NPV, IRR, modified IRR, payback and discounted payback for a series of periodic cash flows, with the NPV profile across rates.
- ROI and CAGR calculator
Calculate ROI (total return) and CAGR (compound annual growth rate) from an investment's start and end values, over years or between two dates.
- Black-Scholes calculator (option price and Greeks)
Calculate European call and put prices and the Greeks (delta, gamma, theta, vega, rho) with the Black-Scholes-Merton model, including dividends.
- Bond price, yield and duration calculator
Calculate a bond's price from its yield to maturity, or the YTM from its price, with current yield, Macaulay and modified duration and convexity.
- Rental property calculator (cap rate and cash flow)
Calculate a rental property's cap rate, NOI, monthly cash flow, cash-on-cash return and IRR, with a year-by-year projection of rent, value and equity.
- Stock average cost calculator (P&L and position size)
Calculate your average cost per share across several buys, unrealized profit and return, and the position size for your risk and stop loss.
- XIRR calculator (irregular cash flows)
Calculate XIRR, the annualized return on cash flows made on irregular dates, and XNPV at your discount rate, matching Excel's actual/365 method.
Planning
- Retirement calculator
Calculate how much you need to retire on inflation-adjusted expenses, the monthly saving that gets you there, and how the money runs down.
- Rent vs buy calculator
Compare renting and buying a home: net worth from owning versus renting and investing the difference, year by year, and when buying pulls ahead.
Business
- Break-even calculator
Calculate the break-even point in units and sales revenue from fixed costs, price and variable cost, plus the volume needed for a target profit.
- DCF calculator (discounted cash flow valuation)
Calculate enterprise value, equity value and value per share with a DCF: projected free cash flows plus a Gordon-growth terminal value.
- Depreciation calculator
Calculate a depreciation schedule by straight-line, declining balance, double declining, sum-of-years' digits or units of production, with book value.
Tax
- GST, VAT and sales tax calculator
Add GST, VAT or sales tax to a price, or remove it from a tax-inclusive price, with stacked state and local rates or India's CGST/SGST split.
- Income tax calculator
Calculate income tax for India FY 2025-26 (new vs old regime), US federal 2025 and UK 2025-26, with take-home pay and marginal and effective rates.
Retirement
- 401k calculator
Calculate your 401(k) balance at retirement from salary, contribution rate and a two-tier employer match, with 2026 IRS limits and catch-up.
- Roth IRA calculator
Calculate your 2026 Roth IRA contribution limit after the income phase-out, its growth, and whether a Roth or traditional IRA leaves more after tax.
- RMD calculator (required minimum distribution)
Calculate your required minimum distribution from the IRS Uniform Lifetime or joint table, your RMD starting age (73 or 75), and future RMDs.
How to choose a finance calculator
Match the question to the cash flows
Use EMI for a loan's scheduled principal-and-interest payment. Use the mortgage calculator when taxes, insurance and other housing costs belong in the monthly budget. A refinance comparison answers a different question: whether changing loans helps over your planned holding period after fees and remaining balances. Compare scenarios with the same dates and assumptions. A lower monthly payment can come from extending the term and can increase total interest.
Loan payments · Mortgage budget and guide · Refinance timing
Separate assumptions from guarantees
Compounding frequency, contribution timing, fees and inflation all affect a growth projection. Enter an annual rate in the field intended for it, and check whether the result is nominal or adjusted for inflation. Tax and retirement tools identify the jurisdiction and year they model. Use a range of plausible inputs and read the limitations before comparing plans. These calculations illustrate a model; they do not predict returns or determine which product you should buy.