Estimate savings growth
Compound Interest Calculator
Use a simple annual compounding estimate when you have one starting balance, one fixed rate, and a whole-year time horizon.
Calculator library
Calculators
Browse free financial calculators by category, task, formula notes, and estimate limitations.
Calculator results are educational estimates based on the numbers entered. They are not financial, tax, legal, lending, investment, or regulated advice.
Start with the question
Common calculator paths
These entry points route common planning questions to a calculator, its formula notes, and a plain-English guide when one is available.
Compare a loan payment
Loan Payment Calculator
Start with amount borrowed, rate, term, and payment tradeoffs before comparing a real lender quote.
Estimate a mortgage payment
Mortgage Payment Calculator
Separate principal and interest from the wider housing costs that can change a home affordability estimate.
Normalize a budget
Budget Calculator
Convert monthly and yearly money numbers into one view before testing debt, savings, and irregular costs.
Test debt payoff timing
Fixed Payment Credit Card Payoff Calculator
See how a fixed payment changes payoff time and interest without treating the estimate as issuer-specific advice.
Explore retirement assumptions
Retirement Calculator
Compare long-term contribution and return assumptions while keeping uncertainty and inflation in view.
Browse by category
What each calculator category is for
Category pages collect related calculators and topic pages connect them to formula help. Use the notes on each calculator page to check included inputs and excluded assumptions.
Debt
Debt calculators
Debt calculators help compare payoff timing, interest cost, and debt-to-income pressure from the numbers you enter.
Start with the tool that matches the question: one credit card, several debts, a lender-facing DTI ratio, or a wider monthly budget.
Investment
Investment calculators
Investment calculators help compare time, return, contribution, fee, bond, and cash-flow assumptions without treating the result as a market forecast.
Start with the calculator that matches the input you know: a fixed growth rate, a target balance, a cash-flow series, a fund-fee estimate, a bond price, or a time-value variable.
Loan
Loan calculators
Loan calculators help route borrowing questions by payment, APR-style fee effects, amortization schedules, payoff time, vehicle finance, and lease assumptions.
Start with the unknown you need to estimate: scheduled payment, payoff time, APR-style cost, interest rate, amortization, vehicle offer, or lease payment.
Mortgage
Mortgage calculators
Mortgage calculators help separate principal-and-interest payments, full housing-cost estimates, payoff timing, refinance assumptions, down-payment cash, affordability pressure, and rent-versus-buy scenarios.
Start with the housing question you need to estimate: basic payment, total monthly cost, payoff effect, refinance comparison, upfront cash, affordability, rent range, or rent-versus-buy model.
Retirement
Retirement calculators
Retirement calculators help separate accumulation estimates, payout math, workplace-plan scenarios, required-minimum-distribution estimates, and broad retirement planning assumptions.
Start with the retirement question you need to estimate: annuity-style accumulation, payout timing, retirement savings or withdrawals, 401(k) contributions and match, or a US RMD calculation.
Savings
Savings calculators
Savings calculators help separate broad deposit-growth projections from focused fixed-monthly-deposit interest estimates.
Start with the savings question you need to estimate: a flexible growth model with increasing deposits and tax drag, or a simple regular-savings model with one monthly deposit and gross interest.
Tax
Tax calculators
Tax calculators help separate entered sales-tax or VAT rates from net price, tax amount, and tax-inclusive totals.
Start with the tax question you need to estimate: US-style sales tax added to a before-tax price, or VAT-inclusive and VAT-exclusive price conversion from a rate you already verified.
Full directory
All calculators by category
The full list below is grouped by category. Favorites and recent usage can personalize the order in your browser, but calculator inputs and saved scenarios are not used for ad targeting.
Business
Business calculators
Depreciation Calculator
Estimate book-value depreciation using straight-line, declining-balance, or sum-of-years-digits methods.
Margin Calculator
Calculate profit margin, stock trading margin requirement, or currency exchange margin from clear business and trading inputs.
Commission Calculator
Calculate simple, base-plus-commission, and tiered commission payouts from sales, rates, and tier bands.
Debt
Debt calculators
Budget Calculator
Plan monthly cash flow from before-tax income, tax rate, and detailed household spending categories.
Credit Card Payment Plan Calculator
Compare fixed-payment, minimum-percent, and target-date plans for one credit card balance.
Debt-to-Income Ratio Calculator
Estimate housing-cost and total-debt ratios from before-tax income, housing obligations, and recurring monthly debt payments.
Fixed Payment Credit Card Payoff Calculator
Estimate payoff time, total paid, and interest for one card using one fixed monthly payment.
Debt Payoff Calculator
Plan a debt avalanche payoff schedule across multiple debts with optional monthly, yearly, and one-time extra payments.
Investment
Investment calculators
Compound Interest Calculator
Estimate future value from principal, a fixed annual rate, and whole-year annual compounding.
Simple Interest Calculator
Estimate interest earned and final value using simple (non-compounding) interest.
Interest Calculator
Estimate ending balance, contributions, interest, tax drag, and inflation-adjusted buying power.
CD Calculator
Estimate certificate of deposit maturity value, interest earned, and tax drag from deposit, rate, term, and compounding.
ROI Calculator
Estimate return on investment, gain or loss, and annualized return from investment amounts and time held.
Payback Period Calculator
Estimate simple and discounted payback periods for an investment with recurring annual cash flow.
Average Return Calculator
Estimate annualized return from account cash flows or from several holding-period returns.
Mutual Fund Calculator
Estimate mutual fund ending value, net return, investor IRR, and the drag from sales charges and operating expenses.
IRR Calculator
Estimate internal rate of return from fixed recurring cash flows or irregular annual project cash flows.
Bond Calculator
Estimate fixed-rate bond price, yield, coupon sensitivity, clean price, dirty price, and accrued interest.
Finance Calculator
Solve one time-value-of-money variable from periods, rate, present value, periodic payment, and future value.
Present Value Calculator
Discount a future lump sum or a stream of equal periodic deposits back to today's value.
Future Value Calculator
Project a starting amount and equal periodic deposits forward to a future value.
Investment Calculator
Solve an investment goal from starting amount, end amount, return rate, contribution amount, and investment length.
Loan
Loan calculators
Loan Payment Calculator
Estimate monthly payment, total paid, and total interest for an amortizing loan at a fixed rate.
Personal Loan Calculator
Estimate personal loan payments, total cost, payoff date, and effective APR after fees and monthly insurance.
Student Loan Calculator
Estimate student loan repayment, extra-payment payoff savings, or projected balance after school and grace period.
Business Loan Calculator
Estimate business loan repayment, total interest, fees, and the real APR after loan costs.
APR Calculator
Estimate annual percentage rate from loan amount, note rate, term, and finance charges.
Payment Calculator
Solve either the monthly payment for a fixed-term loan or the payoff time for a fixed monthly payment.
Amortization Calculator
Estimate a fixed loan payment schedule, payoff timing, first-month split, and interest saved from extra payments.
Interest Rate Calculator
Find the fixed annual interest rate implied by a loan amount, loan term, and monthly payment.
Auto Loan Calculator
Estimate monthly vehicle loan payments from price, down payment, trade-in value, rate, and term.
Boat Loan Calculator
Estimate boat loan payments or back-solve an affordable boat price while accounting for down payment, trade-in, tax, and fees.
Cash Back or Low Interest Calculator
Compare a vehicle rebate with higher-rate financing against a lower-rate financing offer without the rebate.
Auto Lease Calculator
Estimate an auto lease monthly payment from capitalized cost, residual value, money factor, term, down payment, trade-in, and sales tax.
Lease Calculator
Estimate a lease payment from asset value, residual value, term, and interest rate, or solve the effective rate implied by a quoted monthly lease payment.
Mortgage
Mortgage calculators
Mortgage Payment Calculator
Estimate principal-and-interest mortgage payments from home price, down payment, rate, and term.
Mortgage Payoff Calculator
Estimate how extra mortgage payments, annual lump sums, one-time prepayments, or biweekly-style repayment can shorten a payoff timeline and reduce interest.
Refinance Calculator
Compare an existing loan with a refinanced loan using the current balance, original loan details, new rate, new term, points, fees, and cash-out amount.
Rent vs. Buy Calculator
Compare the long-term financial cost of buying a home with renting by modeling mortgage payments, transaction costs, ownership costs, rent growth, taxes, appreciation, and investment opportunity cost.
Rent Calculator
Estimate an affordable monthly rent range from gross income and recurring monthly debt payments.
Down Payment Calculator
Estimate home price, cash needed, or down payment percentage from upfront cash, home price, closing costs, interest rate, and loan term.
Mortgage Calculator
Estimate a full monthly mortgage payment including principal, interest, tax, insurance, PMI, HOA, and other recurring costs.
House Affordability Calculator
Estimate an affordable home price from household income, debt payments, a fixed housing budget, mortgage terms, and recurring homeownership costs.
Retirement
Retirement calculators
Annuity Calculator
Estimate deferred annuity accumulation from starting principal, regular additions, growth rate, and contribution timing.
Annuity Payout Calculator
Estimate a fixed-length annuity payout amount or how long an annuity can last with a fixed payout.
Retirement Calculator
Estimate retirement savings needs, savings required, monthly withdrawal capacity, and how long savings may last.
401K Calculator
Project a 401(k) balance, estimate early withdrawal costs, and find the salary contribution needed to capture an employer match.
RMD Calculator
Estimate a required minimum distribution from a tax-deferred retirement account and project next year's RMD.
Savings
Savings calculators
Savings Calculator
Estimate savings growth from an initial deposit, growing contributions, interest, compounding, and tax drag.
Regular Savings Interest Calculator
Estimate gross savings growth from a starting balance, fixed monthly deposits, and an annual interest rate.
Shopping
Shopping calculators
Discount Calculator
Calculate sale price, amount saved, discount rate, or original price for percent-off and fixed-amount discounts.
Tax
Tax calculators
Sales Tax Calculator
Calculate before-tax price, sales tax rate, after-tax price, and tax amount from any two known values.
VAT Calculator
Calculate VAT-inclusive price, VAT-exclusive price, VAT rate, or tax amount from two known values.