Finance Calculators
Loans, mortgages, saving, investing, retirement and business arithmetic. Every rate, tax and fee is an assumption you enter; nothing here is a quote, a lending decision, investment advice or tax advice.
Mortgage & Housing
Monthly payments, extra payments, refinancing, affordability and the rent-versus-buy decision.
- Mortgage Calculator
Monthly housing payment: principal and interest, property tax, insurance, HOA and PMI.
- Mortgage Extra Payment Calculator
Interest and time saved by extra monthly, yearly or one-time principal payments.
- Refinance Break-Even Calculator
When closing costs are recovered, and total cost over the time you expect to keep the loan.
- Rent vs. Buy Calculator
Compare the net cost of renting and buying over a horizon with your own assumptions.
- Home Affordability Calculator
Estimate a home price from income, debts, housing costs and debt-to-income limits you set.
Loans & Debt
Loan payments and schedules, APR, credit cards, debt payoff strategies and debt-to-income ratios.
- Loan Payment Calculator
Fixed-rate payment with a full amortization schedule you can download.
- Auto Loan Calculator
Car payment with down payment, trade-in, financed fees and your sales-tax treatment.
- Credit Card Payoff Calculator
Months to pay off a card balance and total interest, including payments that never finish it.
- Debt Snowball vs. Avalanche Calculator
Compare paying smallest balance first against highest rate first across several debts.
- Debt-to-Income Ratio Calculator
Front-end and back-end debt-to-income ratios from monthly income and payments.
- APR Calculator
Estimate the APR of a fixed-rate loan once fees are included.
Savings & Investing
Interest, compounding, yields, CDs, bonds, dividends and investment returns.
- Simple Interest Calculator
Interest on a principal at a flat rate, with the total and a year-by-year view.
- Compound Interest Calculator
Growth with regular contributions, contribution timing and any compounding frequency.
- Savings Goal Calculator
Find the monthly amount needed to reach a goal, or how long your current saving will take.
- ROI Calculator
Net return on investment and annualized return from a start value, end value and dates.
- APY Calculator
Convert a nominal rate to annual percentage yield for any compounding frequency, and back.
- CD Calculator
Certificate of deposit value at maturity, with an optional early-withdrawal penalty.
- Dividend Reinvestment Calculator
Dividend income and reinvestment growth with yield, price growth and tax assumptions.
- Dollar-Cost Averaging Calculator
Purchase ledger with average cost basis and return at a valuation price you enter.
- CAGR Calculator
Compound annual growth rate between two positive values over a period.
- Bond Price and Yield Calculator
Price, current yield and yield to maturity for a plain fixed-coupon bond.
Retirement
Accumulation, withdrawals, FIRE targets, employer matches, Roth versus traditional, and fees.
- Retirement Savings Calculator
Project savings at retirement in future dollars and in today’s dollars.
- Retirement Withdrawal Calculator
How long savings last under fixed withdrawals, returns and inflation.
- FIRE Calculator
Financial-independence target and time to reach it from your own spending and return assumptions.
- Roth vs. Traditional Calculator
Compare after-tax outcomes of Roth and traditional contributions at the same out-of-pocket cost.
- Employer 401(k) Match Calculator
Employer match from your pay, contribution rate and matching tiers, with a vesting assumption.
- Investment Fee Calculator
What percentage and fixed fees cost over time, compared side by side.
Business Finance
Margins, break-even, NPV and IRR, rental property returns and debt-service coverage.
- Profit Margin and Markup Calculator
Price, cost, margin and markup from any two, with the difference explained.
- Break-Even Calculator
Units and revenue needed to cover fixed costs, with contribution margin.
- NPV and IRR Calculator
Net present value and internal rate of return for periodic cash flows, with root checks.
- Rental Property Calculator
Cash flow, cap rate and cash-on-cash return from rent, vacancy, expenses and financing.
- Business Loan DSCR Calculator
Debt-service coverage ratio and the loan payment your cash flow supports at a target DSCR.
Everyday Money
Budgets, net worth, emergency funds, pay conversion, discounts, tax, tips and inflation.
- Inflation Calculator
Purchasing power over time at an inflation rate you enter.
- Discount Calculator
Sale price after one discount or several stacked discounts, and the true combined percent off.
- Sales Tax Calculator
Add sales tax to a price, or back tax out of a tax-inclusive total.
- Tip Calculator
Tip on a bill and each person’s share, with pre-tax tipping and rounding options.
- Salary to Hourly Calculator
Convert gross pay between hourly, weekly, monthly and annual using your hours and weeks.
- Emergency Fund Calculator
Target for an emergency fund from essential expenses and months of coverage.
- Budget Calculator with Savings Rate
Monthly and annual budget with savings rate; mix weekly, monthly and annual items.
- Net Worth Calculator
Assets minus liabilities by category, saved on this device only if you choose.
Related guides
- Nominal vs. real returns: adjusting savings for inflation
How to turn a nominal return into a real one, when subtracting inflation goes wrong, and how to show a 30-year savings projection in today’s dollars.
- APR vs. APY vs. interest rate: which number to compare
Which rate to compare when you borrow and when you save, what each one includes, and how to convert between them, with worked numbers you can rerun.
- How loan amortization works, with a worked schedule
The payment formula, how each payment splits between interest and principal, why the last payment is off by a few cents, when principal overtakes interest on a long loan, and what extra payments and negative amortization do to the schedule.
- How investment fees compound: 0.1% vs. 1% over 30 years
What a yearly percentage fee takes from a long-term balance, why most of the damage lands in the last decade, and how to compare fund, advisory and flat account fees.
- How to compare loan offers: APR, fees and total cost
Match the offers on cash received and term, then compare APR and total cost. A worked $15,000 example shows how fees, longer terms and early payoff can change which offer is cheaper.
- What’s included in a mortgage payment: PITI, PMI and escrow
The parts of a monthly housing payment, worked through for a $360,000 home with 5% down: what each part costs, which parts change, and the payment on which PMI drops off.