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SumWize turns big financial questions into clear answers, for people planning their own money, and for the advisors who guide them.

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Monthly mortgage payment

$2,275
principal & interest
Home price$450,000
Down payment20%
Interest rate6.5%
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Home & Mortgage

Mortgage payment

Principal, interest, taxes & insurance, plus the lifetime cost of the loan.

$2,850/mo
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Retirement

Are you on track?

Compare what you'll have saved to what your retirement will actually cost.

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Debt

Card payoff

Your debt-free date and the interest you'll save.

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Savings

Compound growth

Watch a lump sum or monthly savings grow over time.

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Auto

Auto loan

Monthly payment and total cost for any car loan.

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Retirement

FIRE number

The nest egg that lets you retire early.

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Cash Flow

Net worth

Add up what you own, minus what you owe.

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Every answer, fully shown its work.

Most calculators hand you a number and hope you trust it. SumWize shows the exact formula, the assumptions, and a worked example you can check by hand.

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Mortgage payment · the math
payment = P × r / ( 1 − (1 + r)^−n ) P = 360,000 · r = 0.0054167 · n = 360 = $2,275.44 principal & interest

Add $450 tax and $125 insurance a month → $2,850 total. Verify it on any calculator.

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Monthly payment
$2,850
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One toolkit

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From your first mortgage to your last required distribution, organized the way you actually think about money.

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Every financial question has a calculator

Fourteen categories, organized around real decisions, not jargon.

Learn the why

Guides that make the math make sense

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Retirement

The Complete Guide to Retirement Planning

How much you'll really need, and the steps that get you there.

8 min read
Investing

Investing Basics: Returns, Risk, and Allocation

Put your money to work without guessing or gambling.

7 min read
Savings

How to Grow Your Savings

Where to keep cash, how much to hold, and how it compounds.

6 min read
Browse all guides →

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