Finance Calculators — Guides & Articles

• How to Calculate Simple Interest on a Car Loan

  Published 2026-07-30

  Calculate simple interest on a car loan using I = P × r × t. Enter principal, rate, and term into the Simple Interest Calculator to get interest and total…

  

• How to Calculate Savings Between Two Deposit Scenarios

  Published 2026-07-30

  Project the savings between two deposit amounts using the future value formula for a starting balance plus recurring contributions. Includes a worked example.

  

• How to Calculate ROI in Years (CAGR Formula and Example)

  Published 2026-07-29

  Calculate ROI in years using the CAGR formula. See how annualized return compares gains across timeframes, with a worked example and free calculator.

  

• How to Calculate Retirement Income With Social Security

  Published 2026-07-29

  Calculate retirement income from Social Security and personal savings. Project your nest egg, apply the 4% rule, and see combined monthly income.

  

• Mortgage Interest Limitation: How to Calculate It

  Published 2026-07-29

  Calculate total mortgage interest using the standard amortization formula, then see what your calculator excludes — PMI, points, ARMs, and more.

  

• How to Calculate Loan Repayment With a Fixed Payment

  Published 2026-07-29

  Calculate loan repayment at your fixed monthly payment. See payoff months, total interest, and how faster payments cut years off your debt.

  

• GDP Deflator: Calculate Inflation Rate and Future Cost

  Published 2026-07-29

  Use the GDP deflator formula to derive the inflation rate, then project future cost and buying power with our free Inflation Calculator.

  

• How to Calculate Mortgage Affordability Step by Step

  Published 2026-07-29

  Calculate mortgage affordability from your income, monthly debts, and down payment using the 28/36 rule. Find the maximum home price you can carry.

  

• How to Calculate Discounted Payback Period on BA II Plus

  Published 2026-07-28

  Calculate the discounted payback period on a BA II Plus using the CF and NPV buttons. See the formula, a worked example, and shortcuts.

  

• How to Calculate Compound Interest Over Time at Any Rate

  Published 2026-07-28

  Calculate compound interest over time with the formula A = P(1 + r/n)^(nt). Compare annual, monthly, and daily compounding at any horizon in your browser.