How to choose financial calculators for loans, pay, debt, and savings
Start with the result you need, then choose the calculator whose inputs match it. A loan balance and rate need a different calculation than a dated cash-flow series or savings deadline.
Choose a loan or mortgage calculator
- Loan Calculator calculates payment, interest, and total cost from amount, rate, term, and optional origination fee.
- Amortization Calculator lays out principal, interest, and balance by payment period.
- APR Calculator calculates loan APR from amount, stated rate, fees, term, payment frequency, and payment timing.
- Mortgage Calculator includes taxes, insurance, HOA, mortgage insurance, and extra principal in a fixed-rate mortgage.
- Mortgage Payoff Calculator estimates payoff date and interest saved from an extra monthly payment.
- Refinance Calculator compares current and proposed mortgages with closing costs, points, and cash-out.
- House Affordability Calculator estimates price and loan amount from income, debts, housing costs, and your DTI thresholds.
- Down Payment Calculator calculates a target down payment and monthly savings plan from savings and target date.
- Rent vs Buy Calculator compares cash flow, equity, estimated net position, and break-even horizon over your chosen period.
- Auto Loan Calculator separates cash due at signing from financed costs and shows an amortization schedule.
- Car Lease vs Buy Calculator compares lease and purchase cash outlay using mileage, fees, tax, maintenance, and resale assumptions.
- HELOC Calculator models available credit, interest-only and repayment payments, total cost, and rate sensitivity.
Compare debt payoff and financial position
- Debt Payoff Calculator compares avalanche and snowball strategies for multiple debts, with payment order, payoff date, interest saved, and monthly schedule.
- Credit Card Payoff Calculator uses balance, APR, minimum payment, and optional extra payment to calculate payoff time and interest.
- Debt-to-Income Ratio Calculator calculates front-end and back-end DTI from gross income and recurring monthly debts.
- Financial Health Calculator uses assets, liabilities, income, and recurring debts to calculate net worth and debt-to-income ratio.
- Net Worth Calculator builds a net worth statement from the assets and liabilities you enter.
Calculate interest, valuation, and investment returns
- Simple Interest Calculator calculates simple interest and maturity value from principal, annual rate, and term using I = P x r x t.
- Compound Interest Calculator calculates simple interest, compound interest, APY, and APR from principal, rate, fees, term, and frequencies.
- APY Calculator converts a nominal interest rate and compounding frequency into an effective annual yield.
- Future Value Calculator calculates the future value of a lump sum plus regular contributions using rate, term, and compounding frequency.
- Present Value Calculator calculates the present value of a future amount using a discount rate, term, and compounding frequency.
- CAGR Calculator calculates compound annual growth from a starting value, ending value, and two dates.
- ROI Calculator calculates ROI, cost basis, and net profit from investment cost, proceeds, income, and fees.
- Investment Return Calculator includes contributions, withdrawals, income, and fees in total return, ROI, CAGR, and IRR results.
- IRR Calculator calculates internal rate of return from a dated cash-flow series and shows cash-flow timing and convergence details.
- NPV Calculator calculates net present value for a cash-flow series entered by period or calendar date, with each discount factor shown.
- Cash Flow Valuation Calculator handles one-time, recurring, or dated cash flows and shows present value, future value, NPV, IRR, and a timeline.
Handle pay, tax, prices, and savings goals
- Pay Calculator combines pay conversions, overtime, commission, raises, bonuses, and deductions.
- Paycheck Calculator estimates net pay per paycheck and annually from gross pay, pay frequency, and manual deductions.
- Hourly to Salary Calculator converts an hourly rate into annual, monthly, and weekly equivalents using hours, weeks, and unpaid time off.
- Salary to Hourly Calculator converts annual salary into hourly, daily, weekly, and monthly equivalents using work hours, weeks, and paid time off.
- Overtime Pay Calculator calculates gross overtime pay from base hourly rate, regular hours, overtime hours, and overtime multiplier.
- Raise Calculator calculates new pay from a raise percentage or dollar amount.
- Commission Calculator calculates sales commission from total sales, quota, and tiered commission rules.
- Bonus After Tax Calculator (After-Withholding Estimate) estimates take-home bonus from bonus amount and withholding-rate assumptions.
- Discount Calculator calculates a final sale price with stacked discounts, optional sales tax, and quantity.
- Tip Calculator calculates tip and total, can leave tax out of the tip base, and splits the total between people.
- VAT / Sales Tax Calculator adds VAT or sales tax to a net price or extracts tax from a gross price.
- Inflation Calculator compares purchasing power between two dates using one annual rate or a year-by-year rate series you enter. It uses no live CPI data.
- Emergency Fund Calculator calculates a reserve target and contribution plan from monthly expenses, income stability, and target months.
- Savings Goal Calculator calculates the monthly contribution required for a target amount by a deadline.
- Savings & Retirement Calculator models savings goals, emergency-fund targets, FIRE-style independence, and withdrawals.
- Retirement Income Calculator projects retirement savings and sustainable annual retirement income from spending, contributions, return, and inflation assumptions.
- FIRE Calculator estimates a financial-independence target and FI year from savings, spending, contributions, return, and withdrawal rate. It applies each figure without automatic inflation adjustment.
Match a calculator to a money task
Home buyers can compare price and payment. Borrowers can compare payoff orders. Managers can calculate pay. Savers can plan a target date.
Match the inputs to the result
Choose the page whose inputs produce the result you need. The Calculators category covers other areas. This group covers borrowing, pay, debt, and savings.
Frequently asked questions
Which financial calculator should I use for a loan?
Use the Loan Calculator for payment, interest, and total cost. Choose the Mortgage Calculator for a fixed-rate mortgage with housing costs, or the Amortization Calculator when you need principal, interest, and balance by period.
What is the difference between debt payoff calculators?
The Debt Payoff Calculator handles multiple debts and compares avalanche and snowball strategies. The Credit Card Payoff Calculator uses one credit-card balance, APR, minimum payment, and optional extra payment.
Which calculator shows purchasing power over time?
The Inflation Calculator shows cumulative inflation, equivalent value, and real versus nominal change between two dates. You enter one annual rate or a year-by-year rate series, and the page uses no live CPI data.
How do I choose between ROI, CAGR, IRR, and NPV?
Use ROI for a return comparison, CAGR for annualized growth between two values and dates, IRR for a dated cash-flow series, and NPV for cash flows evaluated with a discount rate.