Finance Calculators— Guides & Articles

• How to Calculate Compound Interest on a BA II Plus Online

  Published 2026-07-26

  Calculate compound interest online without BA II Plus keystrokes. Enter principal, rate, frequency, and years to see the final balance instantly.

  

• Auto Loan Calculator: Estimate Your Monthly Car Payment

  Published 2026-07-26

  Use our free auto loan calculator to estimate your monthly car payment, total interest, and total loan cost. Enter your price, down payment, trade-in, APR,…

  

• How to Calculate Retirement Expenses and Monthly Income

  Published 2026-07-25

  Figure out what your retirement expenses will look like and what monthly income your savings can support. Use the 4% rule to plan ahead with confidence.

  

• Calculate Loan Payoff in Excel: NPER and Faster Options

  Published 2026-07-25

  Calculate loan payoff in Excel using the NPER function, or skip the spreadsheet with a free tool that returns the payoff time in months, total interest, and…

  

• How to Calculate Inflation Rate and Future Buying Power

  Published 2026-07-25

  Learn the inflation rate formula and project future cost and purchasing power. Enter amount, rate, and years to see how inflation affects your money.

  

• How to Calculate Your Housing Affordability Index

  Published 2026-07-25

  Calculate a housing affordability index from income, debts, and down payment using the 28/36 rule. Find your maximum home price with this free tool.

  

• How to Calculate Discount Rate for NPV in Excel

  Published 2026-07-25

  Calculate the discount rate for NPV in Excel using NPV, XNPV, IRR, and XIRR functions, with a worked example and a free discount calculator.

  

• How to Calculate Compound Interest in Excel (Step-by-Step)

  Published 2026-07-24

  Calculate compound interest in Excel using the FV function or the formula A = P(1 + r/n)^(nt). The same math runs in a free browser-based calculator.

  

• How to Calculate Car Loan Interest Per Month

  Published 2026-07-24

  Calculate car loan interest per month with the standard amortization formula. See your monthly payment, total interest, and total cost together.

  

• Calculate Car Loan Interest Paid in Minutes Without Formulas

  Published 2026-07-21

  Find out exactly how much interest you’ll pay on a car loan before you sign. Enter price, down payment, APR, and term to see monthly payment and total…