Free Online Unit Converter
Convert between 1000+ measurement units with our fast, fast, and easy-to-use conversion tools
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Enjoyed by professionals worldwide with useful calculations based on standard conversion rates.
Wide Range
From cooking measurements to scientific units, we've got all your conversion needs covered.
Popular Conversion Tools
Understanding Unit Conversion
Unit conversion is essential in various fields including science, engineering, cooking, and daily life. Our free online converter helps you switch between different measurement systems like metric and imperial units with ease. Whether you're a student, professional, or just need to convert measurements for a recipe, our tools provide fast results instantly.
Did you know? The metric system, used by most countries worldwide, was first introduced during the French Revolution. Learn more about the history of the metric system on Wikipedia.
Why Choose Our Unit Converter?
Fast, fast, and easy-to-use conversion tools for all your needs
Lightning Fast
Get instant conversions with our optimized calculation engine. No waiting, just results.
Really Useful
Useful calculations you can go to for both everyday and professional use.
Mobile Friendly
Works perfectly on all devices, from smartphones to desktops.
Popular Conversion Tools
Quick access to our most used unit converters
How to Use Our Unit Converter
1
Select Your Converter
Choose from our wide range of conversion tools in the sidebar.
2
Enter Your Value
Type in the number you want to convert in the input field.
3
Get Instant Results
View converted values in multiple units simultaneously.
Used by Thousands
What our users say about our converter tools
Sarah Johnson
"I use this converter daily for my international cooking blog. It's incredibly fast and saves me so much time!"
Michael Chen
"As an engineer, I need useful conversions. This tool never lets me down, and I love the clean interface."
Emily Rodriguez
"Perfect for my students who need to convert between metric and imperial units for their science projects."
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Try It NowFrequently Asked Questions About Our Conversion Tools
Measurement Conversion Tools
The Length Converter helps you convert between units like meter, kilometer, centimeter, millimeter, inch, foot, yard, and mile. Perfect for measurements in construction, travel, or education.
The Area Converter transforms measurements between square meter, square kilometer, square centimeter, square millimeter, square inch, square foot, square yard, square mile, acre, and hectare. Ideal for real estate and land planning.
The Weight Converter allows conversions between kilogram, gram, milligram, pound, ounce, ton, and metric ton. Useful for cooking, shipping, or fitness tracking.
The Temperature Converter switches between Celsius, Fahrenheit, and Kelvin. Great for weather analysis, scientific experiments, or travel.
The Data Converter handles conversions between bit, byte, kilobyte, megabyte, gigabyte, terabyte, and petabyte. Essential for IT professionals and data storage calculations.
The Pressure Converter converts between pascal, kilopascal, bar, psi, and atmosphere. Useful for engineering, meteorology, and industrial applications.
The Volume Converter transforms units like cubic meter, liter, milliliter, gallon, quart, pint, cup, and fluid ounce. Perfect for cooking, manufacturing, or liquid measurements.
The Speed Converter switches between meter per second, kilometer per hour, mile per hour, knot, and foot per second. Ideal for automotive, aviation, or sports analytics.
The Density Converter handles conversions between kilogram per cubic meter, gram per cubic centimeter, and pound per cubic foot. Useful for material science and engineering.
Math Conversion Tools
The Percentage Converter transforms between percent, decimal, and fraction formats. Ideal for financial calculations, education, or data analysis.
The Roman Numerals Converter switches between Roman and Arabic numerals. Perfect for historical studies, design, or educational purposes.
The Angle Converter transforms between degree, radian, and gradian units. Useful for geometry, physics, and engineering calculations.
The Binary Converter converts between binary, decimal, hexadecimal, and octal formats. Essential for programming and computer science.
The Scientific Notation Converter switches between decimal, scientific (e), scientific (x), and engineering notations. Great for scientific calculations and engineering.
Automotive Conversion Tools
The Fuel Efficiency Converter transforms between miles per gallon, liters per 100 kilometers, and kilometers per liter. Ideal for vehicle performance and trip planning.
Clothing Conversion Tools
The Bra Size Converter converts between US, UK, EU, FR, IT, AU, and NZ sizing standards. Perfect for online shopping and international purchases.
The Clothing Size Converter switches between US, UK, EU, and International sizes. Ideal for fashion and online retail.
The Shoe Size Converter transforms between US, UK, EU, and International shoe sizes. Great for buying footwear online or internationally.
The Hat Size Converter converts between US, UK, EU, and International hat sizes. Perfect for finding the right fit for headwear.
Food Conversion Tools
The Cooking Converter transforms units like teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon, milliliter, liter, gram, ounce, and pound. Ideal for recipes and culinary tasks.
Time Conversion Tools
The Timezone Converter switches between UTC, GMT, EST, PST, CST, and MST. Perfect for scheduling across different time zones.
The Age Converter calculates age in years, months, weeks, days, hours, minutes, and seconds. Useful for planning events or tracking milestones.
The Date Duration Calculator computes the duration between two dates in days, weeks, months, or years, with options for weekend exclusion. Ideal for project planning and scheduling.
The Timer tool offers countdown, stopwatch, and alarm modes with customizable durations and alerts. Perfect for productivity and time management.
Paper Conversion Tools
The Paper Converter handles conversions between A4, Letter, Legal, Tabloid, A3, A5, and B5 paper sizes. Useful for printing and document preparation.
Design Conversion Tools
The Color Converter switches between HEX, RGB, HSL, and CMYK formats. Ideal for graphic design and web development.
The Aspect Ratio Calculator computes ratios in pixels, inches, centimeters, or millimeters. Perfect for video editing and image design.
The Pixel to Rem Converter transforms between CSS pixel and rem units. Essential for responsive web design and accessibility.
The Accessibility Checker ensures typography compliance with WCAG 2.1 guidelines for font size, contrast ratio, and line height. Ideal for web accessibility.
The Color Picker lets you select colors from a palette or enter HEX, RGB, HSL, or CMYK codes. Great for design and branding.
Engineering Conversion Tools
The Flow Rate Converter transforms between cubic meter per second, liter per second, and gallon per minute. Useful for plumbing and engineering.
The Power & Energy Converter switches between watt, kilowatt, megawatt, horsepower, joule, kilojoule, calorie, and kilocalorie. Ideal for energy calculations.
The Frequency Converter converts between hertz, kilohertz, megahertz, and gigahertz. Essential for electronics and telecommunications.
The Torque Converter transforms between newton meter, pound force foot, and kilogram force meter. Useful for mechanical engineering and automotive tasks.
Utility Conversion Tools
The Electric Plug & Voltage Checker provides information on voltage, frequency, and plug types. Perfect for travelers and electrical planning.
The Meme Generator creates memes using templates like Drake, Doge, Grumpy, and more. Great for social media and creative projects.
The Excel Converter transforms Excel files to JSON or CSV and vice versa, with in-browser data preview. Ideal for data analysis and spreadsheet management.
Electronics Conversion Tools
The RF & Electronics Power Conversion Tool converts between watt, dBm, dBw, and other units. Essential for RF engineering and electronics.
Financial Conversion Tools
The Loan Calculator computes principal, interest rate, term, monthly payment, and total payment. Perfect for financial planning and loan analysis.
The Currency Converter transforms between USD, EUR, GBP, JPY, AUD, CAD, CHF, and CNY. Ideal for travel and international transactions.
The Tip Calculator computes tip percentage, amount, and total bill. Great for dining and service industries.
The Discount Calculator computes percentage, amount, and final price after discounts. Perfect for shopping and budgeting.
The Unit Price Calculator computes price per unit, total price, and quantity. Ideal for comparing product costs.
The Mortgage Calculator computes loan amount, interest rate, term, monthly payment, and amortization schedules. Essential for home buying.
The Salary to Hourly Converter transforms between annual, monthly, biweekly, weekly, and hourly wages. Great for job comparisons and budgeting.
The Sales Tax Calculator computes pre-tax and total-with-tax amounts. Ideal for shopping and financial planning.
Media Conversion Tools
The Audio Extractor from Video converts video files (MP4, MKV, WebM, MOV, AVI) to MP3 or AAC audio. Perfect for creating audio tracks from videos.
The Video Format Converter transforms video files between MP4, WebM, AVI, MKV, MOV, and FLV formats. Ideal for video editing and compatibility.
The Video to GIF Converter turns video clips into animated GIFs, allowing customization of start time, duration, FPS, and width. Great for social media.
The Video Resolution Converter changes video resolution (e.g., 4K to 1080p, 720p, 480p, 360p) and outputs to MP4. Perfect for device optimization.
The Video Frame Extractor extracts individual frames from videos as PNG or JPG images, downloadable as a ZIP archive. Ideal for analysis and animation.
The Image Sequence to Video tool converts PNG or JPG image sequences into MP4, WebM, or GIF videos. Perfect for stop motion and animation.
The Video Trimmer cuts video clips by selecting start and end times, preserving the original format. Ideal for video editing.
The Audio Format Converter transforms audio files between MP3, WAV, OGG, FLAC, AAC, and M4A formats. Great for music production and compatibility.
The Audio Bitrate Converter adjusts audio files to bitrates like 128k, 192k, 256k, or 320k. Ideal for optimizing file size and quality.
The Video Compressor reduces video file sizes (MP4, WebM, MKV, MOV, AVI) by adjusting bitrate and resolution. Perfect for sharing and uploading.
PDF Conversion Tools
The Merge PDF tool combines multiple PDF files into a single document. Ideal for document organization and sharing.
The Split PDF tool divides a PDF into multiple files or pages. Perfect for extracting specific sections of documents.
The Compress PDF tool reduces PDF file sizes for easier sharing and storage. Maintains document quality.
The PDF to Image tool converts PDF pages to JPEG or PNG images. Ideal for presentations and web use.
The Reorder PDF Pages tool rearranges pages within a PDF document. Perfect for document organization.
The Rotate PDF Pages tool adjusts the orientation of PDF pages. Useful for correcting scanned documents.
The Delete PDF Pages tool removes specific pages from a PDF. Ideal for editing and streamlining documents.
The Add Text to PDF tool inserts text into PDF documents. Perfect for annotations and form completion.
The Fill PDF Forms tool allows you to complete interactive PDF forms. Ideal for official documents and applications.
The Extract Text from PDF tool retrieves text from PDF files. Great for data extraction and analysis.
The Add Image to PDF tool inserts images into PDF documents. Perfect for adding logos or visuals.
The OCR PDF to Text tool converts scanned PDFs to editable text using OCR technology. Supports multiple languages and preserves layout.
Image Conversion Tools
The Image Resizer adjusts image dimensions by pixels, percentage, or aspect ratio. Ideal for web optimization and social media.
The Image Compressor reduces JPEG, PNG, and WebP file sizes while maintaining quality. Perfect for website performance.
The Image Format Converter transforms images between JPEG, PNG, WebP, BMP, TIFF, and GIF formats. Great for compatibility and design.
The Image Cropper trims images to free, square, portrait, landscape, or social media aspect ratios. Ideal for photo editing.
Health Conversion Tools
The BMI Calculator computes Body Mass Index, body fat percentage, and waist-to-hip ratio. Includes health tips for wellness.
Web Development Tools
The HTML Format Converter transforms HTML to Markdown, PDF, DOCX, JSON, or images. Ideal for web content repurposing.
Chemistry Conversion Tools
The pH Converter transforms between pH, hydrogen ion concentration, and hydroxide ion concentration with temperature correction. Great for chemistry research.
Productivity Tools
The Pomodoro Timer offers customizable focus sessions, breaks, and progress tracking. Perfect for students and professionals.
Document Conversion Tools
The PDF to Office tool converts PDFs to Word, Excel, PowerPoint, or text formats. Preserves content and formatting.
The Office to PDF tool converts Word, Excel, PowerPoint, and text files to PDF. Maintains document formatting.