Finance Calculators — Guides & Articles
Free Inflation Calculator, No Sign-Up Required
Published 2026-09-09
Use a free inflation calculator with no sign-up. Enter an amount, rate, and years to see future cost and purchasing power instantly in your browser.
Home Affordability Calculator on Mac: No Install Needed
Published 2026-09-09
Run a home affordability calculator on Mac to see the maximum home price under the 28/36 DTI rule. Free, browser-based, no install needed.
Discount Calculator on Mac: Find Your True Savings
Published 2026-09-09
Calculate exact sale prices and stacked coupons on your Mac. Get instant, private results in Safari or Chrome without spreadsheets or installations.
Car Loan Calculator on Mac: Run It in Safari or Chrome
Published 2026-09-09
Estimate monthly car payment, total interest, and total cost on your Mac in any browser. No app or sign-up needed; your numbers stay on your device.
Tip Calculator Example: From Bill to Per-Person Total
Published 2026-09-08
See a real tip calculator example worked out step by step: how a $48 dinner split three ways at 20% turns into exact per-person amounts.
COLA Impact on Survivor Benefits: A Payment Estimate
Published 2026-09-08
Estimate the COLA impact on survivor benefits with official 2018–2026 rates or a separate 2027 projection, transparent formula, and SSA-style truncation.
How Accurate Is a Simple Interest Calculator? The Math
Published 2026-09-08
An accurate simple interest calculator applies I = P × r × t with a percentage rate and years, and shows linear growth you can verify by hand.
Retirement Calculator Formula: Future Value and 4% Rule
Published 2026-09-07
The retirement calculator formula combines the future value of your current savings with the future value of an ordinary annuity, then applies the 4% rule…
Mortgage Calculator Example: $400,000 at 6.5%
Published 2026-09-07
See a real mortgage calculator example: a $400,000 home at 6.5% over 30 years. Walk through every input, the formula, and the monthly payment result.
Is a Loan Payoff Calculator Accurate? The Math Explained
Published 2026-09-07
Is a loan payoff calculator accurate? See the closed-form math behind exact payoff months and how to verify your number against a lender.