Finance Calculators— Guides & Articles

• Home Affordability Calculator Based on Income: How It Works

  Published 2026-08-17

  Run a home affordability calculator based on income to find your max home price. Enter income, debts, and down payment to see your 28/36 DTI budget.

  

• Discount Calculator Alternative: Find True Stacked Savings

  Published 2026-08-17

  Looking for a discount calculator alternative? See why stacked coupons (20% + 10%) equal 28% off, not 30%, and find the true sale price in seconds.

  

• Calculate ROI for Investment Property: A Simple Method

  Published 2026-08-15

  ROI for investment property is (final value − initial cost) ÷ initial cost × 100. Add a holding period to see the annualized return. Try the free ROI…

  

• Calculator for Retirement Savings: Your Age Is the Input

  Published 2026-08-15

  A calculator for retirement savings: project your nest egg and monthly income under the 4% rule from your age, savings, contributions, and expected return.

  

• Find Your Loan Payoff Date With Extra Payments

  Published 2026-08-15

  See how much sooner you'll be debt-free when you add extra payments. Find your payoff date, total interest saved, and months cut with a free, private…

  

• 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.