Finance Calculators— Guides & Articles
How to Calculate Car Loan APR Step by Step
Published 2026-07-12
Calculate car loan APR using the standard formula. Find out what rate you are really paying and how it affects your monthly auto payment.
Tip Before or After Tax: How to Calculate It Right
Published 2026-07-12
Most etiquette experts say you should tip on the pre-tax subtotal, not the post-tax total. Here's why, plus how to split a bill fairly using a free tip…
Calculate Simple Interest Over Multiple Years in One Step
Published 2026-07-11
Simple interest over multiple years is calculated with the formula A = P(1 + rt). Enter your principal, rate, and time to see interest earned and total…
How to Calculate ROI in 30 Seconds with a Free Online Tool
Published 2026-07-10
Return on investment (ROI) tells you how much profit you earned relative to the cost. Use this free ROI Calculator to get your percentage and net profit…
How to Calculate Retirement Savings and Income
Published 2026-07-10
Calculate your retirement nest egg and project monthly income using the 4% rule. Determine how much to save today to meet your future goals.
Calculate Your Mortgage Payment and Total Interest in One Click
Published 2026-07-10
Enter your home price, down payment, interest rate, and loan term to instantly see your monthly mortgage payment, total interest, and full amortization…
Calculate Inflation in Seconds to See Future Costs and Purchasing Power
Published 2026-07-10
Use the exact inflation rate to see how much today’s $100 will buy in 10 years—enter the amount, rate, and years to get instant future cost and purchasing…
Determine Your Affordable Home Purchase Price in 3 Simple Steps
Published 2026-07-10
Use the 28/36 rule to find the maximum home price you can afford based on your income, debts, and down payment—no complex math required.
Calculate Discount in Excel and Compare Stacked Coupons Accurately
Published 2026-07-10
Find the exact sale price and true savings in Excel with simple formulas. See why stacked discounts (20% then 10%) equal 28% off, not 30%, and avoid common…
How to Calculate Compound Interest on a CD in Minutes
Published 2026-07-10
Calculate CD compound interest accurately using the formula A = P(1 + r/n)^(nt). See how frequency affects earnings with a free online calculator.