Calculator library

Free calculators for everyday money decisions.

Start with a focused tool, then use the plain-English notes to understand what the numbers mean. All calculators run in your browser — no sign-up, no data collected.

Debt

Debt Payoff Calculator

Estimate payoff time, total interest, and the effect of extra monthly payments.

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Borrowing

Debt-to-Income Ratio Calculator

Estimate current DTI and test how a proposed housing payment could change it.

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Credit cards

Credit Card Payoff Calculator

Estimate payoff time and interest cost for a credit card balance.

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Savings

Emergency Fund Calculator

Calculate a practical emergency fund range from your essential monthly expenses.

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Goals

Savings Goal Calculator

Find the monthly savings needed to reach a target amount by a deadline.

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Budget

Monthly Budget Calculator

Allocate income across bills, savings, debt, and flexible spending.

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Home

Extra Payment Mortgage Calculator

Compare mortgage payoff dates and interest savings from extra mortgage payments.

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Tracking

Net Worth Calculator

Add assets and liabilities to estimate your current financial snapshot.

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Retirement

401(k) Contribution Calculator

Estimate annual contributions, catch-up limits, and employer match.

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Retirement

Roth vs Traditional IRA Calculator

Compare simplified after-tax values using tax rate and return assumptions.

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Housing

Rent vs Buy Calculator

Compare simplified renting and homebuying costs over a time period.

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Health benefits

HSA Contribution Calculator

Estimate HSA limits, employer contributions, catch-up room, and possible tax savings.

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Auto debt

Auto Loan Payoff Calculator

Estimate car loan payoff time, total interest, and savings from extra payments.

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Student debt

Student Loan Payoff Calculator

Estimate student loan payoff time, interest cost, and savings from extra payments.

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Retirement

Retirement Savings Goal Calculator

Estimate a retirement nest egg target, projected savings, and monthly contribution needed.

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Retirement income

Retirement Income Withdrawal Calculator

Estimate how long retirement savings may last with withdrawals and inflation.

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Investing

Taxable Investment Growth Calculator

Estimate taxable account growth, tax drag, capital gains tax, and after-tax value.

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Business

AI ROI Calculator

Estimate AI workflow time savings, monthly costs, payback period, and first-year ROI.

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Social Security

Social Security Break-Even Calculator

Compare claiming ages, cumulative benefits, and a simple break-even age.

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Inflation

Inflation and COLA Impact Calculator

Estimate future costs, COLA-adjusted value, and purchasing power gaps.

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Retirement healthcare

Healthcare Cost in Retirement Calculator

Estimate premiums, prescriptions, out-of-pocket care, inflation, and income share.

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Long-term care

LTC Calculator

Estimate care costs, inflation, insurance benefits, income offsets, and funding gaps.

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Pair with guides

Every tool comes with a plain-English explanation.

Prefer to understand the concept before running numbers? Browse the guide library.