Finance Calculators — Guides & Articles

• Calculate Inflation Over Time: Future Cost and Power

  Published 2026-08-15

  Calculate inflation over time with the compound formula: amount × (1 + rate)^years. Project future cost and purchasing power for any amount and horizon.

  

• COLA Percentage vs Dollar Increase: The Formula

  Published 2026-08-14

  See how a Social Security COLA percentage becomes a dollar increase using one simple formula, plus official 2018-2026 rates and a 2027 projection.

  

• Home Affordability Calculator Alternative: Reverse Method

  Published 2026-08-13

  Looking for a home affordability calculator alternative? Start with income and debts; the 28/36 rule returns a realistic maximum home price.

  

• Accurate Car Loan Calculator: The Formula Behind It

  Published 2026-08-12

  An accurate car loan calculator uses the fixed-rate amortization formula. See how the five inputs work, what the monthly figure covers, and what it skips.

  

• How to Calculate Tip on a Bill: The Core Formula

  Published 2026-08-11

  Calculate the right tip on any bill with a simple formula. Enter the bill, pick a percentage, and split the total between people in one tap.

  

• Calculate Simple Interest Between Two Dates: A Quick Method

  Published 2026-08-11

  Calculate simple interest between two dates by converting the date range into years and applying I = P × r × t. Includes a worked example and edge cases.

  

• Calculate Inflation on an Amount: Future Cost and Power

  Published 2026-08-10

  Calculate inflation on an amount with the free Inflation Calculator. Enter dollars, a rate, and years to see future cost and purchasing power instantly.

  

• Best Savings Template for Recurring Deposits

  Published 2026-08-10

  Use the best savings template to project recurring deposits with a starting balance. See future value, contributions, and interest earned in real time, in…

  

• Calculate ROI for an Investment: The Core Formula

  Published 2026-08-10

  To calculate ROI for an investment, divide profit by initial cost and multiply by 100. Get the percentage and annualized return instantly.

  

• Calculate Retirement Growth Over Time With Compounding

  Published 2026-08-10

  See how your retirement nest egg grows from today to retirement. Enter savings, monthly contributions, and expected return for instant projections.