Free online tools, no sign-up
Calculators, converters and generators that run right in your browser — nothing to install, no login, and your data never leaves your device. Pick a tool below and get started in seconds.
Finance
- Compound Interest CalculatorSimulate investments and savings with compound interest. Find out how much your money can grow over time.
- Percentage CalculatorCalculate discounts, increases, percentages of values, and percentage changes between numbers.
- Simple Interest CalculatorQuickly calculate simple interest on loans, investments or financing. Find out the interest amount and the final total with an easy-to-use tool.
- Investment CalculatorSimulate your investments and find out how much your money can grow over the years, factoring in monthly contributions and different rates of return.
- Fuel CalculatorCalculate trip cost, your vehicle's average fuel consumption, and total fuel expenses.
- Electricity Cost CalculatorEstimate your appliances' energy consumption and find out the approximate cost on your power bill.
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Links & QR Codes
Math
- Number Base ConverterConvert numbers between decimal, binary, hexadecimal and octal — handy for students and programmers.
- Unit ConverterQuickly convert measurements like length, weight, temperature, area and volume.
- Area CalculatorCalculate the area of different shapes like squares, rectangles, circles and triangles.
- Volume CalculatorCalculate the volume of boxes, tanks and spaces using simple measurements.
Security
Health
Labor Calculators
- Brazilian Net Salary CalculatorEstimate your net take-home pay after Brazilian payroll deductions like INSS and income tax (IRRF).
- Brazilian Vacation Pay CalculatorCalculate Brazilian vacation pay with the constitutional one-third bonus, based on salary and rest days.
- Brazilian Severance Pay CalculatorEstimate Brazilian severance pay: salary balance, notice pay, proportional 13th salary and vacation, unused vacation, and the FGTS termination fine.
Developer Tools
Why use Util Hub?
- 100% freeEvery tool is free and unlimited. No plans, no paywall, no trial period.
- No sign-upNo account to create, no email to confirm, no app to install. Just open the page and use it.
- Privacy firstCalculations run inside your own browser. Your numbers and text are never sent to any server.
- Fast and responsiveLightweight pages that load instantly and work well on phone, tablet and desktop.
Everything you need in one place
Util Hub brings together online calculators, converters and generators for everyday tasks — from a percentage calculator, compound interest and net salary calculators to a password generator, WhatsApp link generator, JSON formatter and unit converter. Each tool is built to solve one specific task quickly, with no hassle.
Everything runs right in your browser, with no software to download and no account to create. Because the processing happens on your device, you can use the tools with peace of mind, knowing the data you type never leaves your computer or phone. It's the online toolbox you open once and come back to whenever you need it.
Frequently asked questions
Are Util Hub's tools free?
Yes. Every tool on the site is 100% free and can be used as many times as you like, with no limits and no cost.
Do I need to create an account?
No. None of the tools require sign-up, login or installation. Just open the page for the tool you want and start using it right away.
Is my data safe?
Yes. Most tools process everything directly in your browser, which means the values and text you enter aren't sent to our servers. See the Privacy Policy for details.
Does it work on mobile?
Yes. The site is fully responsive and works on phones, tablets and desktops, in any modern browser, with no app to install.