Free Online Calculators

Fast, clear calculators for construction, money, home projects and more. Every calculator shows its formula, a worked example and its assumptions.

Finance

401(k) Calculator

Estimate how your 401(k) balance could grow based on contributions, employer matching, salary growth, and investment returns.

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Loan Amortization Calculator

Calculate monthly loan payments, total interest, total amount paid, and view a complete amortization schedule.

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