Guides & Articles

Practical, plain-English guides to go with our calculators — 78 articles and counting.

• Financial Calculators

  Pension Calculator Guide

  Compare a defined-benefit pension against a 401(k): who bears the investment risk, how each grows, and what that means for your retirement plan.

• Financial Calculators

  Social Security Calculator Guide

  Compare the permanent cut for claiming at 62 against the permanent boost for waiting until 70, and see when the smaller-longer check actually wins.

• Financial Calculators

  Annuity Calculator Guide

  How to use an accumulation annuity to turn steady deposits into a target balance, with a worked example and mistakes that quietly shrink your total.

• Financial Calculators

  Annuity Payout Calculator Guide

  How annuity payout income works as longevity insurance, what a $250,000 payout actually buys, and how to weigh guaranteed income against self-managed withdrawals.

• Financial Calculators

  Credit Card Calculator Guide

  Why your card statement doesn't match a simple monthly estimate: daily periodic rates, average daily balance, and how compounding differs from a loan.

• Financial Calculators

  Credit Cards Payoff Calculator Guide

  Compare the debt avalanche and snowball payoff methods, and see why minimum payments alone can keep you in debt for decades.

• Financial Calculators

  Debt Payoff Calculator Guide

  How to build one coordinated payoff plan when you owe a mix of credit cards, personal loans, and medical bills — not just one type of debt.

• Financial Calculators

  Debt Consolidation Calculator Guide

  How to check if a consolidation loan's blended rate actually beats your weighted-average debt rate once origination fees are counted in.

• Financial Calculators

  Repayment Calculator Guide

  Learn the core repayment formula that underlies auto, student, and personal loan calculators, and when to solve for payment vs. payoff time.

• Financial Calculators

  Student Loan Calculator Guide

  Why interest accrual during school turns two loans with the same rate into very different balances at graduation.

• Financial Calculators

  College Cost Calculator Guide

  Tuition has outpaced general inflation for decades. See why an 18-year college savings plan needs a higher assumed cost-growth rate than a CPI calculator uses.

• Financial Calculators

  Simple Interest Calculator Guide

  Most loans don't use simple interest, despite the name. See which real products actually do — and which ones only pretend to.