Run Pace Calculator - Online Min/Mile & Min/Km Splits
Calculate your running pace per mile/km, finish time for a race, and split times. Essential for runners.
UD5 Toolkit
Convert between min/km and min/mile, calculate pace, time, or distance instantly.
Calculate your running pace per mile/km, finish time for a race, and split times. Essential for runners.
Use wrapâperâinch (WPI) to identify mystery yarn and see equivalent standard weights (fingering, worsted). Compensate gauge.
Match gap size around doors/windows to the correct type of weather stripping (foam, V-strip, door sweep). Save energy.
Create the perfect brine for refrigerator pickles. Adjust ratios by weight. Quick and safe recipe tool.
Virtual flip coins thousands of times and see the heads/tails ratio converge to 50%. Interactive law of large numbers.
Calculate number of charcoal briquets for Dutch oven cooking temp. Also includes multi-stage cooking time.
Select colors in the OKLCH space with lightness, chroma, and hue. Convert to hex, RGB, and CSS oklch(). Perceptually uniform gradients.
Randomly given state names, type the 2âletter postal code. Track accuracy.
Calculate developed length for a bend. Enter thickness, angle, inside radius, and K-factor. Essential for metalworking.
Searchable list of Q-codes with meanings. Also includes RST system. Prepare for license.
Paste an HTML `<table>` snippet and instantly get a clean Markdown table. Supports colspan and alignment hints. Local.
Choose fabric type and weight to see the ideal needle size and point style. Prevent skipped stitches and snags.
Fill out a clean budget worksheet with income and expense categories. See totals and print. No data stored.
Select shoe size and riding style to get recommended deck width. Visual comparison.
Select playing style (rhythm, lead, strumming) and string gauge to get the recommended pick thickness in mm.
Convert screen RGB colors to print-ready CMYK values. Understand color shifts before printing. Ideal for graphic designers preparing artwork for press.
Enter your bag dimensions and compare against major airline carry-on and checked limits. Visual pass/fail gauge. Avoid gate fees.
Style the <progress> and <meter> elements with crossâbrowser CSS. Adjust colors and sizes. Copy the final styles.
A sound-enabled spinning wheel with your custom options. Exciting animation and result reveal. Local only.
Choose a base color and see its complementary, splitâcomplementary, triadic, and tetradic harmonies. Copy palettes. Local.
Convert RGB and RGBA color values to their HEX or HEX+alpha representation. Live preview and copy CSS color strings instantly.
Enter color in any CSS format and see all other representations. Live preview. Swatch history.
Paste a cURL command and convert it into a minimal Postman collection JSON. Import and run. Local only.
Use <input type='color'> and see its change events and value in hex. Understand the native color picker. Quick demo.
Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.
Paste body text and test different font/background combos. See an actual passage rendered, not just a ratio. True feel for legibility.
Test yourself on international calling codes. Random country, type the code. Or reverse. Perfect for travelers.
Add grid items beyond defined tracks and see how implicit rows/columns expand. Set sizes interactively. Master the grid.
Generate a dummy RSA or EC public/private key pair for educational visualization. Shows key structure and ASN.1 dump. Not for production use.
See the Pantone Colors of the Year and popular palettes from past years. Get hex codes. Design inspiration.