Free Online Tools for Developers and Electronics Projects

Age Calculator

Calculate age online for free by birth date and target date. Get exact age in years, months, days, total months, and total days instantly.

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Amps to Watts Calculator

Convert amps to watts online for free. Enter current and voltage to calculate electrical power instantly with common unit options.

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Base64 Encode and Decode Tool

Encode and decode Base64 online for free. Convert text to Base64 or decode Base64 back to readable text directly in your browser.

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Battery Life Calculator for Runtime Estimates

Estimate battery runtime online for free using battery capacity, load current, and efficiency. Great for electronics projects and portable devices.

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BMI Calculator

Calculate BMI online for free using metric or imperial units. Enter height and weight to get your body mass index and standard BMI category instantly.

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Calorie Calculator

Calculate calories online for free. Estimate BMR, maintenance calories, and daily calorie targets for weight loss or weight gain.

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Case Converter

Convert text case online for free. Change text to uppercase, lowercase, title case, or sentence case directly in your browser.

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Character Counter with Live Text Stats

Count characters online for free with live stats for letters, spaces, words, lines, and paragraphs. Paste or type text in your browser and get instant results.

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Compound Interest Calculator

Calculate compound interest online for free. Enter starting amount, rate, years, and monthly contributions to estimate future value and interest earned.

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