Capibrain

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Make sense of money.

Free, interactive tools and plain-language explanations to help you understand how money actually works — without the jargon, the upselling, or the asterisks.

Try the mortgage tool
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The toolkit

Tools to make different financial questions concrete.

Each tool turns an abstract financial decision into something you can poke at, see, and feel. Pull a slider, watch the numbers move, learn what's actually happening.

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Mortgage tool

Live

See what offset accounts, extra repayments, and rate changes really do over the life of a home loan. Includes Australian stamp duty and first-home-buyer concessions.

Try it →
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Salary explainer

Soon

See exactly where each dollar of pay goes — tax, super, take-home — and what a pay rise actually changes month-to-month.

Coming soon
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Savings target

Soon

Pick a goal and a timeline. See what compounding really does to your money — and what changes if you start a year earlier or later.

Coming soon
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Kids' fund

Soon

How much could a small monthly contribution grow into by the time your child turns 18? See it for different starting ages and amounts.

Coming soon
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Learn

Soon

Short, plain-language explainers on the things money people don't always volunteer. From offset accounts to inflation to how interest really compounds.

Coming soon
Why Capibrain

A space to think, not a place to buy.

Knowledge is leverage.

The people profiting from your money decisions know how this stuff works. Capibrain helps you understand it too — so the conversations you have feel different.

Built for learning, not advice.

Capibrain isn't selling a loan, a fund, or a recommendation. It's a sandbox to poke at numbers and see what happens. Real decisions deserve real conversations with real professionals.

Free, no signup, no tracking.

Nothing you type is saved anywhere — not on your device, not on a server, not in cookies. Your inputs vanish when you close the tab. The site fetches public data, that's it.