Calculate screen width and height from diagonal size and aspect ratio. Convert between inches and centimeters for displays, TVs, and monitors with instant dimension calculations.

Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.

Convert between international paper sizes (A4, Letter, Legal) with dimensions in mm, cm, and inches. Compare ISO A/B series and North American paper standards.

Convert between MPG (miles per gallon), L/100km (liters per 100 kilometers), and other fuel efficiency units. Compare car fuel economy across different measurement systems.

Split large CSV files into smaller files by number of rows. Process large datasets in manageable chunks instantly.

Generate JSON-LD Product schema markup for SEO. Add product details like name, price, brand, rating, and availability to create structured data for rich search results.

View and search large text files up to 200MB in your browser. Features virtual scrolling, line numbers, search functionality, and file statistics. Perfect for log files, CSV, JSON, and code files.

Generate secure, cryptographically random API keys for authentication and authorization. Create custom API keys with various formats including hex, base64, and prefixed keys.

Full-featured scientific calculator with trigonometric, logarithmic, exponential functions, memory operations, and calculation history

Calculate percentage of any number, find what percent one number is of another, percentage increase/decrease, and percentage difference with real-time results

Calculate grade point average from grades. Support multiple GPA scales (4.0, 5.0, 10.0), letter grade to GPA conversion, weighted/unweighted GPA, semester GPA and cumulative GPA tracking

Calculate final grade based on assignments and weights. Support multiple assignment categories (homework, quizzes, tests, final exam) with custom weights, show current grade and what's needed on remaining assignments

Calculate with fractions - add subtract multiply divide. Support all operations with automatic simplification to lowest terms, mixed number support, decimal conversion, and step-by-step solution display

Calculate standard deviation and variance. Support both population and sample statistics, paste data from Excel/CSV, show mean, median, variance, standard deviation, and complete statistical analysis

Calculate cumulative college GPA across multiple semesters. Track overall GPA, major GPA, and institutional GPA separately. Supports transfer credits, honors eligibility checking, and semester-by-semester breakdown

Calculate what score you need on your final exam to achieve your target grade. Enter your current grade, final exam weight, and desired grade to instantly see the required final exam score with achievability status