Home · Calculators
Calculators that show the math.
Every tool here is free, needs no login, and is built to make the math visible — so you understand the answer, not just read it. New calculators are added regularly.
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Compound Interest
See how a starting amount and a monthly habit grow over time — and how much of the total is growth you never had to earn.
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Mortgage Payment
Your real monthly payment — principal, interest, taxes, insurance, and PMI — plus what extra payments would save you.
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Retirement Projection
How much you'll have at retirement, based on your age, savings, and contributions. Currently featured on the home page.
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Mortgage Rate Comparison
Today's rates from eight major lenders, side by side, with an embedded payment calculator and editorial verdicts.
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