Finance Calculators Online Free
Money questions, answered instantly
Free finance calculators: US take-home pay after taxes, rent vs buy, loan payments, amortization, and compound interest projections.
20 free tools · 100% browser-based · no sign-up
Take-Home Pay
Salary details
See your US after-tax income — federal, FICA & state withheld
Open toolRent vs Buy
Home & rent details
Compare renting vs buying a home over any time horizon
Open toolLoan Calculator
Loan details
Monthly payments, total interest & full amortization schedule
Open toolCompound Interest
Investment details
Project growth with compound interest and regular contributions
Open toolSimple Interest
Loan or investment details
Interest on the principal only — quick and predictable
Open toolSavings Goal
Goal details
Find the monthly deposit needed to hit your goal
Open toolTip Calculator
Bill details
Tip amount, total, and per-person split in one tap
Open toolDiscount Calculator
Price and discount
Final price and savings after any percent off
Open toolPercent Change
Two values
Percent increase or decrease between two values
Open toolCurrency Converter
Amount and currencies
Convert between 25+ currencies with live rates
Open toolInflation Calculator
Amount and years
What $100 in 1980 is worth today — US CPI based
Open toolRetirement Calculator
Your profile
Project your nest egg with inflation-adjusted buying power
Open toolDebt Payoff
Debt details
Months to payoff, interest paid, and what extra payments save
Open toolSalary ↔ Hourly
Salary details
Convert hourly rate to salary (and back) in seconds
Open toolBill Splitter
Bill details
Split the bill fairly with tax and tip included
Open toolROI Calculator
Investment details
Return on investment, total and annualized
Open toolRule of 72
Rate or years
How fast does money double? 72 ÷ rate, instantly
Open toolAPY Calculator
APR and frequency
APR to APY — the real rate with compounding
Open toolFuture Value
Investment inputs
What a lump sum plus contributions becomes
Open toolRefinance Calculator
Current and new loan
Is refinancing worth it? Break-even point and savings
Open toolWhy use finance calculators at Super Utility Hub?
Every finance calculators on Super Utility Hub runs 100% in your browser. Nothing is uploaded, nothing is stored, and nothing is installed — the results are generated instantly on your own device. There is no account to create, no file size limit, and no watermark on your output.
All tools are free forever, work on desktop and mobile, and are updated continuously. If a tool isn't listed yet, it's likely on the roadmap — check back soon.
Frequently asked questions
Are the finance tools really free?
Yes. Every finance tool is free with no limits, no trials, and no premium paywall. The site is supported entirely by advertising.
Do I need to create an account?
No account, no email, and no sign-up is required. Open a tool, use it, and you're done — that's it.
Is my data sent to a server?
No. All tools run locally in your browser. Your files and input never leave your device.
Do the tools work on mobile?
Yes. Every tool is responsive and works in any modern browser on Android and iOS.