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💲 Money math, made easy

Your money,
calculated →

12 free calculators for real-life money decisions. From your salary after tax to your FIRE number — no jargon, just the numbers you need.

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Private — runs locally
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Instant — no loading
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5 countries supported
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Mobile-friendly — works anywhere
FIRE Calculator·Salary After Tax·Compound Interest·Investment Returns·Retirement Savings·Rent vs Buy·How Much to Invest·Emergency Fund·Debt Payoff·Savings Goal·Solar Panels ROI·Startup Valuation· FIRE Calculator·Salary After Tax·Compound Interest·Investment Returns·Retirement Savings·Rent vs Buy·How Much to Invest·Emergency Fund·Debt Payoff·Savings Goal·Solar Panels ROI·Startup Valuation·

All calculators

12 tools
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FIRE Calculator
Find your Financial Independence number and retirement date using the 4% rule.
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Salary After Tax
Your real take-home pay after taxes and deductions. Auto-detects your country.
🇳🇿 🇦🇺 🇬🇧 🇺🇸 🇨🇦 5 countries →
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Compound Interest
See how your investments grow over time with the power of compounding.
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Investment Returns
Calculate ROI, CAGR, and total returns on any investment.
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Retirement Savings
How much do you need to save each month to retire comfortably?
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Rent vs Buy
Should you rent or buy? The honest financial comparison for your situation.
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How Much to Invest
Calculate how much to invest monthly to reach your financial goal.
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Emergency Fund
Calculate your ideal emergency fund size based on expenses and risk.
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Debt Payoff
Snowball vs avalanche — find the fastest way to get out of debt.
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Savings Goal
How long until you reach your savings target? Plan your timeline.
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Solar Panels ROI
Calculate the payback period and lifetime savings for solar panels.
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Startup Valuation
Estimate your startup's pre-money valuation using proven methods.
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Why MyFinCalc?

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No fluff, just math
Every calculator uses real formulas and current tax rates. No vague estimates — you get the actual numbers.
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Your data stays with you
All calculations run in your browser. We never see your numbers, never store your data, never sell anything.
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Built for the real world
Salary calculator with real tax brackets for NZ, AU, UK, US and Canada. KiwiSaver, 401k, HECS — we've got it.
⚠️ MyFinCalc provides educational calculators only. Results are estimates and not financial advice. Always consult a qualified financial advisor before making investment decisions.