Finance Calculators — Guides & Articles

• How to Calculate Discount Rate for NPV in Excel

  Published 2026-07-25

  Calculate the discount rate for NPV in Excel using NPV, XNPV, IRR, and XIRR functions, with a worked example and a free discount calculator.

  

• How to Calculate Compound Interest in Excel (Step-by-Step)

  Published 2026-07-24

  Calculate compound interest in Excel using the FV function or the formula A = P(1 + r/n)^(nt). The same math runs in a free browser-based calculator.

  

• How to Calculate Car Loan Interest Per Month

  Published 2026-07-24

  Calculate car loan interest per month with the standard amortization formula. See your monthly payment, total interest, and total cost together.

  

• Calculate Car Loan Interest Paid in Minutes Without Formulas

  Published 2026-07-21

  Find out exactly how much interest you’ll pay on a car loan before you sign. Enter price, down payment, APR, and term to see monthly payment and total…

  

• How to Calculate Tip at a Restaurant the Right Way

  Published 2026-07-21

  Calculate the right restaurant tip in seconds: enter the bill, pick a tip percentage, set the party size, and read tip, total, and per-person shares instantly.

  

• How to Calculate Simple Interest Monthly Payment

  Published 2026-07-21

  Calculate a simple interest monthly payment in three steps: principal, rate, time. Use the free Simple Interest Calculator for instant, accurate results.

  

• How to Calculate Savings Account Interest with Regular Deposits

  Published 2026-07-20

  Find out exactly how much interest your savings will earn with regular deposits. Use this guide to calculate savings account interest rates and project…

  

• How to Calculate ROI in Real Estate (Quick Formula)

  Published 2026-07-20

  Find out how to calculate ROI in real estate using a simple formula and an ROI Calculator. Get net profit and annualized return in seconds.

  

• How to Calculate Retirement Benefits Step by Step

  Published 2026-07-20

  Calculate retirement benefits with a free retirement calculator. Project your nest egg, monthly income, and total contributions in seconds using the 4% rule.

  

• Calculate Your Mortgage Interest Deduction Step by Step

  Published 2026-07-20

  Figure out how much mortgage interest you can deduct on your taxes, what limits apply for 2025, and how to estimate it using a free Mortgage Calculator.