Finance Calculators — Guides & Articles

• How to Calculate Simple Interest for 1 Year

  Published 2026-08-18

  Calculate simple interest for 1 year using the I = P × r × t formula. Estimate interest on deposits, CDs, or short-term loans at any principal and rate.

  

• Calculate ROI for a Loan-Funded Investment

  Published 2026-08-17

  Calculate ROI for a loan-funded investment using ROI% = (final value − cost) ÷ cost × 100, then compare the return to your loan's interest rate.

  

• Calculate Loan to Value Ratio: The Core Formula

  Published 2026-08-17

  Loan-to-value ratio is loan amount divided by home value. See how to derive it from a down payment, what LTV thresholds mean, and why lenders care.

  

• Calculate Loan Payoff With Biweekly Payments

  Published 2026-08-17

  Calculate loan payoff with biweekly payments by converting 26 half-payments into a monthly equivalent, then see months to zero and dollars saved in interest.

  

• Calculate the Inflation Rate From CPI: A Four-Step Method

  Published 2026-08-17

  Derive the inflation rate from Consumer Price Index numbers with the percentage-change formula, then apply it to project future cost and buying power.

  

• 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…