ToolQuarter

Free tools for everyday calculations

Fast, private, no-signup calculators and converters that run right in your browser.

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Percentage CalculatorCalculate percentages, increases, decreases, and differences instantly.CalculatorsAge CalculatorFind your exact age in years, months, days, and more from your date of birth.CalculatorsWord CounterCount words, characters, sentences, and estimate reading time in real time.Text ToolsCM to Inches ConverterConvert centimeters to inches and back with precise, instant results.ConvertersKG to LBS ConverterConvert kilograms to pounds and back with precise, instant results.ConvertersPassword GeneratorGenerate strong, random passwords locally in your browser โ€” never transmitted.Security Tools

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Tip CalculatorCalculatorsBinary / Decimal / Hex ConverterDeveloper ToolsTime Zone ConverterDate & TimeGrade CalculatorEducation Tools

  • Free

    Every tool is free to use, with no limits or hidden fees.

  • Fast

    Results appear instantly as you type, with no page reloads.

  • Private

    Most calculations run locally in your browser and are never uploaded.

  • No Signup

    Use every tool immediately. No account or email required.

  • Mobile Friendly

    Designed to work well on phones, tablets, and desktops alike.

  • Multilingual

    Available in multiple languages, with more on the way.