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Smart Finance
Calculators

Free, instant calculators for your biggest financial decisions. No ads on results, no email required.

✓ Instant Results ✓ Mobile Friendly ✓ No Registration ✓ 100% Free
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Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and full amortization schedule for any home loan.
Home LoanAmortization
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Auto Loan Calculator
Find your monthly car payment and see how trade-in value and down payment affect your total cost.
Car LoanVehicle
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Personal Loan Calculator
Estimate monthly payments for any personal loan amount and term. Includes origination fee calculator.
Personal LoanAPR
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Debt Payoff Calculator
See how extra payments save you thousands in interest. Compare minimum payments vs. accelerated payoff.
Debt FreeCredit Card
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Rent vs Buy Calculator
Is it smarter to rent or buy? Enter your numbers and get a clear financial comparison over any time horizon.
Real EstateDecision
Why use our calculators
Built for clarity, not confusion
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Instant Results
No loading screens. Results appear as you type.
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Private
All calculations happen in your browser. We never see your numbers.
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Mobile Ready
Works perfectly on any screen — phone, tablet, or desktop.
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Always Free
No subscriptions, no sign-ups, no hidden costs. Ever.
Finance Guides
Learn before you decide
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How Much House Can I Afford?
The 28/36 rule, DTI ratio, and exact numbers for 2025.
Read guide →
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Rent vs Buy in 2025
What actually makes sense with rates above 6%?
Read guide →
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How to Pay Off Debt Fast
Avalanche vs snowball — and how much extra payments save.
Read guide →