Run the numbers.
Twenty-one small machines for honest money math. Everything computes in your browser — no signup, no email gate, your numbers never leave the page. The same arithmetic ClariFi runs on your real accounts, minus the accounts. Tools, not advice.
Budget
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Flex Budget Calculator
ClariFi's four-bucket split.
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50/30/20 Calculator
The classic rule, one keystroke.
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Salary ↔ Hourly
Hourly to annual, every paycheck cadence.
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Home
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Mortgage
The whole monthly payment, taxes included.
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Home Affordability
What the 28/36 rule says you can sign for.
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Rent Affordability
What take-home pay says you can sign for.
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Debt & Loans
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Credit Card Payoff
The minimum-payment trap, drawn to scale.
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Debt Payoff
Months, interest, and an actual date.
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Student Loan
The standard plan vs +$100 a month.
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Auto Loan
Payment, interest, and what the car really costs.
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Loan Payment
Any loan → payment, interest, done-by date.
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Debt-to-Income (DTI)
The percentage lenders check first.
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Save
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Emergency Fund
Your cushion: target, gap, done-by month.
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Savings Goal
Pick a number, get a date.
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Net Worth
Own minus owe, one number.
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Invest
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Compound Interest
What time does to money.
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Investment Fees
What 1.86% quietly takes over 30 years.
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Inflation
What 3% quietly does to a dollar.
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Retire
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FIRE Calculator
Pick an age. See if the math agrees.
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Savings Rate
The one percentage that sets your timeline.
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How Long Will My Money Last?
A nest egg meets a monthly withdrawal.
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Every calculator here is deterministic and disclosed — the assumption is printed under the result, not buried in a footnote. When you want this math running against your real accounts: ClariFi, free in TestFlight early access — request an invite.
Prefer the long version? The math behind these tools gets full essays on the blog.