Finance Calculators — Guides & Articles

• Average Monthly Benefit After COLA: How to Estimate Yours

  Published 2026-08-23

  Estimate your average monthly benefit after a Social Security COLA with official 2018–2026 rates or a projected 2027 scenario and whole-dollar truncation.

  

• Calculate Simple Interest for 5 Years: Formula and Example

  Published 2026-08-23

  Calculate simple interest for 5 years using I = P × r × t where r is the decimal rate. Includes a worked example and real-world 5-year loan scenarios.

  

• How Accurate Is an Inflation Calculator?

  Published 2026-08-23

  An accurate inflation calculator applies a fixed annual rate with compound math. See how to project future cost, understand purchasing power, and judge it.

  

• How a Savings Calculator Works: Formulas and Inputs

  Published 2026-08-23

  A savings calculator turns your starting balance, regular deposits, interest rate and time horizon into a future value. Here is the math it runs.

  

• Calculate ROI for Property: Total and Annualized Returns

  Published 2026-08-22

  Get the ROI formula for property, calculate total and annualized returns instantly, and learn what the result does and doesn't capture about your investment.

  

• Retirement Calculator Accuracy: How the Math Works

  Published 2026-08-22

  A retirement calculator is accurate when its compounding formula is transparent and the 4% rule is applied properly. See the exact formula here.

  

• Home Loan Calculator: Estimate Payments and Total Interest

  Published 2026-08-22

  Estimate your monthly mortgage payment, total interest, and amortization schedule with a free home loan calculator that runs locally in your browser.

  

• Home Affordability Calculator Example: A Full Walkthrough

  Published 2026-08-21

  See a home affordability calculator example with $80,000 income, $300 in debts, and $20,000 down. Step-by-step math using the 28/36 rule.

  

• Calculate Compound Interest for 6 Months: A Plan

  Published 2026-08-21

  Calculate compound interest for 6 months using A = P(1 + r/n)^(nt). Enter 0.5 for t, choose the compounding frequency, and read the final amount instantly.

  

• Car Loan Calculator Example: Numbers From a Real Loan

  Published 2026-08-21

  See a worked car loan calculator example with a $30,000 vehicle, 60-month term, and 6.5% APR. Walk through inputs, formula, and what each output means.