UD5 Toolkit
Live Currency Converter – 170+ Currencies & Cryptocurrencies
Convert between 170+ fiat currencies and top cryptocurrencies with live mid‑market exchange rates. No historical charts, just clean conversion.
Tag: Converter - Format & Unit Conversion
99+ toolsWater Hardness Converter – Grains, ppm, mg/L & dH
Convert water hardness readings between grains per gallon, parts per million, milligrams per liter, and German degrees. Perfect for aquarium keepers and espresso lovers.
PX to REM & EM Converter – Scalable CSS Units
Convert pixel values to rem or em based on the root font size. Also batch‑convert an entire CSS snippet, replacing px with rem for accessibility.
Markdown to Plain Text Converter – Strip Formatting
Paste Markdown and receive clean, readable plain text with formatting removed. Useful for repurposing blog content for email or plain‑text editors.
JSON to CSV Table – Flatten Nested Objects Online
Convert a JSON array into a CSV table that you can view, sort, and download. Automatically flattens simple nested objects into dot‑notation columns.
ASCII Text to SVG Converter – Monospaced Diagram Art
Paste ASCII art or text‑based diagrams and convert them into a crisp SVG image. Preserves spacing and can be styled with CSS for documentation.
Active ↔ Passive Voice Converter – Rewrite Sentences
Convert a sentence from active voice to passive voice and vice versa. Helps you understand and practice the grammatical structure for clearer writing.
Goldfish Age Converter – Common & Fancy to Human Years
Estimate the human age equivalent of your goldfish. Learn about goldfish longevity and why proper care helps them live decades rather than months.
Lizard Age to Human Years – Bearded Dragon, Gecko & Iguana
Convert your lizard's age to a comparable human age. Covers popular pet species like bearded dragons, leopard geckos, and iguanas with life stage notes.
Snake Age Converter – Python, Corn Snake & Boa to Human Years
Translate your pet snake's age into human years. Select common species like ball python or corn snake for a rough human-age equivalent and life expectancy.
Rabbit Age to Human Years Converter – Bunny Life Stage
Find out how old your rabbit is in human years. Understand the difference between a 6-month-old bunny and a senior rabbit in terms of human life stage.
EU to US Clothing Size Converter – Dresses, Shirts & Pants
Convert European clothing sizes to US equivalents. Includes women's dresses, men's shirts, pants waist, and general tops with measurement guidance.
UK to US Shoe Size Converter – Men, Women & Kids
Easily convert UK shoe sizes to US sizes (and vice versa) for men, women, and children. Avoid ordering the wrong size when shopping internationally.
Frequency to Wavelength Converter – c = λf Calculator
Convert between frequency and wavelength for electromagnetic and sound waves. Use the speed of light or custom wave speed to get precise results instantly.
Minutes to Decimal Hours Converter – Payroll & Timesheet
Convert minutes to decimal hours for easy timesheet and payroll calculations. See a quick reference chart for common conversions like 15 min = 0.25 hours.
Decimal to Mixed Number Converter – Simple Fraction Form
Turn a decimal number into a mixed number or improper fraction. Shows step-by-step simplification to help understand the conversion process better.
Percentage to Fraction Converter – Simplify Math Instantly
Convert any percentage to a simplified fraction and decimal. Great for students learning math, teachers preparing materials, or anyone who needs a quick conversion.
Tablespoons to ml Converter – Cooking Measurement Quick Tool
Convert tablespoons to milliliters and other common cooking volume units. Also covers teaspoons, cups, fluid ounces, and milliliters for precise liquid measuring.
Cups to Grams Converter – Baking Ingredients Weight
Convert US cups to grams for common baking ingredients including flour, sugar, butter, and more. Get accurate measurements for consistent baking results.
Fahrenheit to Celsius Quick Converter – Oven Temps & Weather
Convert Fahrenheit to Celsius (and vice versa) with a clean, fast interface. Includes common oven temperatures and weather reference points for everyday use.
MPH to KPH Converter – Speed Conversion for Travel
Instantly convert miles per hour to kilometers per hour. Handy for driving abroad, understanding international speed limits, or comparing vehicle performance.
Running Pace Converter – min/mile to min/km
Convert your running pace between minutes per mile and minutes per kilometer. Also see equivalent finish times for 5K, 10K, half marathon, and marathon distances.
kg to lbs & Stone Converter – Weight Conversion Online
Convert kilograms to pounds and stones accurately. Also works for lbs to kg and stone to kg. Perfect for tracking weight loss or cooking with international recipes.
cm to Feet & Inches Converter – Height & Length Quick Tool
Quickly convert centimeters to feet and inches, and vice versa. Essential for international height comparison, furniture dimensions, and understanding metric vs imperial.
Microwave Wattage Converter – Adjust Cooking Time
Your microwave wattage differs from the recipe? Use this tool to adjust the cooking time accurately. Avoid undercooked or overcooked meals by matching the correct wattage.
Instant Pot Time Converter – Stovetop & Slow Cooker to Pressure
Convert recipe cooking times from stovetop, oven, or slow cooker to Instant Pot pressure cooking times. Also includes liquid adjustment tips for best results.
Air Fryer Conversion Calculator – Oven to Air Fryer Time & Temp
Quickly convert conventional oven recipes for your air fryer. Adjust temperature and cooking time so your food comes out crispy and perfectly cooked every time.
Baking Pan Size Converter – Round to Square & Volume
Adapt any recipe to the pan you own. Convert between round, square, and rectangular pans by volume, and see how to adjust baking time and temperature.
Seam Allowance Converter – Imperial & Metric Quick Reference
Convert common seam allowances between inches and centimeters. See visual guides for 1/4″, 3/8″, 1/2″, 5/8″, and more, to avoid cutting errors in your sewing projects.
Knitting Needle Size Converter – US, UK, Metric & Japan
Instantly convert knitting needle sizes between US, UK, metric (mm), and Japanese systems. Never be confused by international patterns again.
Cat Age to Human Years Converter – Updated Formula
Convert your cat's age into equivalent human years using the latest veterinary guidelines. Understand the difference between a 1-year-old and a 15-year-old feline.
Ordinal Date Converter – Day of Year to Calendar Date
Convert an ordinal date (day 1–365/366) to a standard calendar date and vice versa. Useful for agriculture, project planning, and understanding day-of-year notations.
APY to APR Converter – Calculate Effective Annual Rate Online
Quickly convert between Annual Percentage Yield (APY) and Annual Percentage Rate (APR) with compounding frequency. Understand the true cost of loans or real return on savings in a simple online tool.
Thread Weight Converter – Online Tex, Denier, Wt, Nm
Convert between thread weight systems: Tex, denier, Nm, and cotton count. Accurate sewing.
Crochet Hook Size Converter – Online US, UK, Metric, JP
Enter a hook size in any system and instantly see the equivalent in all other standards.
Sax/Clarinet Reed Strength Converter – Online Vandoren to Rico etc.
Convert reed strength between different brands (Vandoren, Rico, D'Addario). Cross‑reference chart.
Herb Drying Method Converter – Online Dehydrator ↔ Oven ↔ Air
If a recipe calls for a dehydrator, convert the time and temperature to a low‑oven method.
Baking Pan Size Converter – Online Round, Square, Rectangle Volume
Enter an original pan size and find an alternative pan with the same batter volume. Never overflow or underfill.
Number to Ordinal (1st, 2nd, 3rd) – Online Multi‑Language
Enter a number and see its ordinal representation in English, Spanish, French, etc. Localized rules.
Ring Size Converter – Online Circumference/Diameter to US, UK, EU
Measure a ring's inside diameter or circumference and convert to US, UK, European, and Japanese sizes.
Hat Size Finder – Online Head Circumference to US/UK Size
Enter your head circumference in cm or inches and get the corresponding hat size in US, UK, and EU scales.
International Bra Size Converter – Online US, UK, EU, FR, AUS
Convert band and cup sizes between US, UK, European, French, and Australian systems. Accurate shopping abroad.
Slow Cooker Time Converter – Online High to Low & Stovetop
Convert a recipe from oven or stovetop to slow cooker (high/low) and vice versa. Perfect doneness.
Hijri to Gregorian Converter – Online Umm al‑Qura Estimate
Convert dates between Hijri and Gregorian using the Umm al‑Qura algorithm. Approximate local moon sighting may vary.
Climbing Grade Converter – Online V‑Scale to Font & YDS
Convert climbing difficulty between V‑scale, Fontainebleau, and Yosemite Decimal System. Quick reference for gym climbers.
Air Fryer Conversion Calculator – Online Oven to Air Fryer
Convert oven recipe temperature and time to air fryer settings. Quick reference.
Instant Pot Time Converter – Online Stove to Pressure
Convert traditional cooking time to electric pressure cooker time. Reference chart.
Leather Thickness Conversion – Online oz to mm Chart
Convert between ounces and millimeters for leather. Visual guide to common project thicknesses.
Number to English Words (Decimal) – Online Check Writer
Convert a number like 1234.56 to English words 'one thousand two hundred thirty-four and 56/100'. For checks.
Advanced Case Converter – Online snake_case camelCase kebab-case
Convert text between various programming case styles. Includes SCREAMING_SNAKE, PascalCase, etc.
Salary to Hourly Rate Converter – Online with Vacation Factor
Convert annual salary to effective hourly rate considering holidays, vacation, and work hours per week.
URL Query String to JSON – Online Parse & Format
Paste a full URL or query string and instantly get a pretty JSON object. Parse arrays and nested keys.
UwU / OwO Text Converter – Online Furry Speak Generator
Transform normal sentences into cutesy UwU speak. Customizable intensity. Internet fun.
Nautical Mile & Knot Converter – Online Marine Units Tool
Convert between nautical miles, statute miles, kilometers, and knots to mph/kmh. Essential for navigation.
CSS Color Converter All-in-One: Hex, RGB, HSL, OKLCH
Enter color in any CSS format and see all other representations. Live preview. Swatch history.
Text to Unicode HTML Entities – Online Convert All Chars
Type text and get every character converted to &#xxxx; entities. Useful for encoding.
Embroidery Thread Converter - Online DMC to Anchor to Madeira
Find equivalent colors across DMC, Anchor, and Madeira embroidery floss brands. Enter a code to see matches. Local reference database.
Scientific Notation Converter - Online Exponential & Decimal Swap
Convert between scientific notation (a × 10^n) and decimal form. Also supports engineering notation. Instant, local.
dBm to Watts Converter - Online RF Power Unit Calculator
Convert between dBm, milliwatts, and watts. Simple calculator for RF engineers and WiFi signal analysis. Instant local calculation.
Bird Age Converter - Online Parakeet & Cockatiel to Human
Convert popular pet bird ages (budgie, cockatiel, macaw) to human years. Lifespan reference included. Fun educational tool.