All Tools

Calculate precise age in years, months, days, hours, and minutes between any two dates with automatic leap year handling and time zone support. Perfect for determining exact age for legal documents, retirement planning, eligibility verification, and personal milestones.

Convert between 15+ area units including square feet, square meters, acres, hectares, and specialized land measurements with precision up to 6 decimal places. Ideal for real estate transactions, construction planning, property assessment, landscaping, and agricultural calculations.

Calculate your Body Mass Index instantly with our comprehensive BMI calculator that provides health category classification, personalized guidance, and visual weight range indicators. Supports both metric and imperial units with specialized calculations for adults, children, and athletes based on latest health guidelines.

Calculate the optimal tire pressure for your vehicle based on weight, load distribution, tire specifications, and driving conditions. Improve fuel efficiency, tire longevity, handling performance, and safety with accurate PSI recommendations for any car, truck, or SUV.

Instantly minify and optimize JavaScript, CSS, and HTML code by removing unnecessary characters, whitespace, and comments without changing functionality. Reduce file sizes by up to 70%, improve page load times, and enhance website performance with our secure browser-based compression tool.

Free currency converter with real-time exchange rates for 170+ world currencies. Instantly convert any amount between USD, EUR, GBP, JPY, and more. Updated rates for accurate international money conversion, travel planning, and business calculations.

Calculate personalized daily calorie needs based on age, gender, weight, height, and activity level using industry-standard formulas (Mifflin-St Jeor and Harris-Benedict). Provides detailed breakdowns of basal metabolic rate (BMR), total daily energy expenditure (TDEE), and goal-specific calorie targets for weight maintenance, loss, or gain with support for both metric and imperial units.

Calculate the precise time between any two dates with detailed breakdowns in years, months, weeks, days, hours, and minutes. Features automatic leap year handling, business day calculations with customizable holiday exclusions, and specialized modes for project timelines, contract durations, and age calculations.

Instantly find the exact day of the week (Monday-Sunday) for any past, present, or future date with historical calendar support. Perfect for event planning, birthday analysis, historical research, and determining business days with international date format compatibility.

Roll virtual dice with customizable sides, count, and modifiers for tabletop gaming, probability exercises, or random decision-making. Features include multiple dice notation formats (XdY±Z), dice pools with success thresholds, exploding dice mechanics, and statistical analysis of roll distributions for RPGs, board games, and educational purposes.

Precisely calculate differential gear ratios from ring and pinion tooth counts for optimal vehicle performance. Essential for mechanics, off-road enthusiasts, and performance tuners planning gear swaps to improve acceleration, towing capacity, or fuel economy in any vehicle.

Determine the perfect daily feeding amount for your dog with our veterinarian-approved calculator that considers weight, age, breed size, activity level, and food calorie density. Ensure optimal nutrition and maintain a healthy weight for puppies, adults, and senior dogs of all breeds.

Accurately calculate engine displacement in cubic centimeters (cc) or liters using bore diameter, stroke length, and cylinder count. Essential for automotive enthusiasts, mechanics, and engine builders planning modifications, rebuilds, or understanding performance specifications.

Convert between all major fuel efficiency measurements (MPG, L/100km, km/L) and calculate precise trip costs based on fuel prices, distance, and vehicle efficiency. Perfect for comparing vehicles, planning road trips, budgeting travel expenses, and understanding international fuel economy standards.

Precisely calculate vehicle top speed, engine RPM at any speed, and optimal gear ratios based on transmission gearing, final drive ratio, and tire dimensions. Essential for automotive enthusiasts, racers, and mechanics optimizing drivetrain setups for performance, fuel economy, or towing.

Instantly convert between horsepower and torque at any engine RPM with precision using our advanced calculator. Essential for automotive enthusiasts, mechanics, engineers, and tuners analyzing engine performance, comparing modifications, or verifying dynamometer results across multiple measurement standards.

Calculate personalized daily water intake requirements based on weight, activity level, climate conditions, and health factors. Provides hourly intake recommendations, hydration timeline planning, and customizable reminders to maintain optimal hydration throughout the day for improved health and performance.

Free image compressor that reduces file size by up to 90% without visible quality loss. Optimize JPEG, PNG, and WebP images for faster website loading, email attachments, and social media uploads while maintaining professional appearance.

Free JSON formatter and validator that instantly beautifies, minifies, and validates JSON code. Fix syntax errors, improve readability with proper indentation, and prepare JSON for APIs, databases, and configuration files. Perfect for developers and data analysts.

Instantly convert between over 20 length units including metric (meters, centimeters), imperial (feet, inches), and specialized measurements (nautical miles, astronomical units) with precision up to 6 decimal places. Perfect for construction, engineering, and everyday measurements.

Generate customizable Lorem Ipsum placeholder text in multiple formats (paragraphs, words, sentences) for web design, graphic layouts, and mockups. Perfect for designers, developers, and content creators needing professional-looking filler text that maintains natural reading rhythm and text density.

Free mortgage calculator that estimates monthly payments, total interest, and amortization schedules. Compare different loan terms, interest rates, and down payments to find affordable home financing options and determine how much house you can afford.

Calculate the exact amount of paint needed for any interior or exterior project based on wall dimensions, number of coats, and paint coverage rates. Save money and reduce waste by determining precise quantities for rooms, houses, fences, or furniture with adjustments for doors, windows, and surface texture.

Free password generator that creates strong, secure, random passwords to protect your online accounts. Customize length and character types (uppercase, lowercase, numbers, symbols) to meet specific security requirements and prevent hacking attempts.

Compress PDF files to reduce file size while maintaining readability

Free PDF merger that combines multiple PDF files into a single document online. No installation required. Easily rearrange pages, merge large documents, and create professional compilations while maintaining original formatting and quality.

Compare lifetime costs and coverage benefits across multiple pet insurance plans with customizable deductibles, premiums, and breed-specific considerations. Essential for pet owners making informed decisions about healthcare coverage, with detailed breakdowns of annual costs, coverage limits, and exclusion analysis.

Free QR code generator that creates custom QR codes for websites, text, contact information, Wi-Fi networks, and more. Generate scannable codes for business cards, product packaging, marketing materials, and contactless information sharing.

Create beautiful color combinations with our random color generator that produces colors in HEX, RGB, and HSL formats with advanced customization options. Perfect for web designers, graphic artists, and developers needing inspiration for websites, apps, branding, and creative projects.

Generate random numbers with customizable ranges, formats, and distribution options. Perfect for lotteries, games, statistical sampling, password generation, and decision making with options for duplicates, sorting, and saving results.

Create customized raw feeding meal plans for dogs and cats with precise protein, organ, bone, and plant matter ratios based on weight, age, and activity level. Perfect for pet owners, breeders, and veterinary professionals seeking nutritionally balanced homemade pet diets with supplement recommendations.

Maximize solar energy production by calculating the optimal tilt angle for your solar panels based on geographic location, season, and mounting constraints. Essential for homeowners, solar installers, and DIY enthusiasts planning fixed or adjustable solar panel installations for maximum efficiency year-round.

Calculate your potential solar energy production, electricity bill savings, and investment payback period with our comprehensive solar savings estimator. Perfect for homeowners considering solar installation.

Quickly convert between mph, km/h, m/s, knots, Mach numbers, and other velocity measurements with precision up to 6 decimal places. Essential for automotive calculations, aviation planning, weather analysis, and scientific applications with specialized units for every field.

Instantly convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur scales with adjustable precision. Perfect for cooking, weather comparisons, scientific calculations, and international temperature references with helpful conversion formulas and reference points.

Instantly convert between plain text and ASCII/Unicode codes in decimal, hexadecimal, and binary formats. Essential for programmers, web developers, and IT professionals working with character encoding, data transmission, and debugging special characters.

Seamlessly convert between human-readable dates and Unix timestamps (seconds since January 1, 1970) with millisecond precision and global time zone support. Essential for developers, system administrators, and data analysts working with logs, databases, and API integrations.

Effortlessly convert between 20+ volume units including liters, gallons, cups, tablespoons, and cubic measurements with precision up to 6 decimal places. Essential for cooking, baking, laboratory work, shipping, and fluid measurements across US, UK, and metric systems.

Ensure your website meets accessibility standards with our WCAG color contrast checker. Test foreground and background color combinations against WCAG 2.1 AA and AAA requirements for improved user experience and legal compliance.

Accurately convert between 15+ weight and mass units including grams, kilograms, pounds, ounces, stones, and tons with NIST-certified conversion factors. Ideal for cooking, fitness tracking, shipping calculations, and scientific applications.