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Category
Utilities
17 calculators
🧮 About Us Learn about WebCalcSys — our mission, features, and the team behind the calculator ecosystem.
🧮 Contact Us Get in touch with the WebCalcSys team. Send us your questions, feedback, or suggestions about our free online calculator ecosystem.
🧮 Base64 Encoder & Decoder Free online Base64 encoder and decoder. Instantly convert plain text to Base64 or decode Base64 back to readable text with real-time conversion.
🧮 Color Converter Free online color converter. Convert colors between HEX, RGB, and HSL formats instantly with live color preview swatch and complementary color suggestions.
🧮 JSON Formatter & Validator Free online JSON formatter, validator, and beautifier. Format, minify, and validate JSON data instantly.
🧮 Regex Tester Free online regex tester. Test regular expression patterns in real-time with highlighted matches, capture group details, and support for global, case-insensitive, and multiline flags.
🧮 UUID Generator Free online UUID v4 generator. Generate cryptographically secure UUIDs using crypto.randomUUID(). Copy individual UUIDs or bulk copy all with one click.
🧮 Capacitor Charge Calculator — Electronics Calculate RC time constant, charge time, and voltage for capacitor circuits. Free online electronics calculator.
🧮 LED Resistor Calculator — Electronics Calculate the current-limiting resistor value and power dissipation for LEDs. Free online electronics calculator.
🧮 Air Fryer Converter Convert conventional oven temperatures and cooking times to air fryer settings. Apply the universal -25°F and -20% time reduction rule instantly.
🧮 Recipe Scaler — WebCalcSys Scale your recipe ingredients to any number of servings. Free online recipe scaler tool.
🧮 Sourdough Baker's Calculator Calculate the exact water and salt weights for your sourdough using baker's percentages. Adjust hydration from 60-85% and salt from 1.5-3%.
🧮 Earthquake Energy (TNT Equivalent) Calculator — Geology Convert Richter magnitude (M) to energy in Joules and equivalent tons of TNT explosives. Free online geology calculator.
🧮 Rock & Mineral Density Calculator — Geology Calculate rock and mineral density with water displacement method. Compare against reference table. Free online geology calculator.
🧮 Privacy Policy WebCalcSys Privacy Policy — how we collect, use, and protect your information.
🧮 Running Pace Calculator — WebCalcSys Calculate your running pace, speed, distance, and predicted race times. Free online running calculator.
🧮 Terms of Service WebCalcSys Terms of Service — rules and guidelines for using our calculator platform.