Dice Notation Roller - Online 2d20, 4d6 Drop Lowest RPG Tool
Enter standard dice notation (e.g., 2d8+3, 4d6k3) and see the roll result and individual dice. Must for tabletop RPG.
UD5 Toolkit
3D Animated Dice — Roll up to 10 dice at once!
Enter standard dice notation (e.g., 2d8+3, 4d6k3) and see the roll result and individual dice. Must for tabletop RPG.
Select multiple languages and tools (Node, Python, Mac, Windows) and generate a combined .gitignore.
Tap when you see lightning, tap again when you hear thunder. Calculates how far away the storm is in miles/km. Important outdoor safety tool.
Watch the planets orbit the Sun in a top‑down 2D view. Adjust speed and zoom. Distances not realistic; beautiful model.
Enter desired pom-pom diameter to estimate yards needed and number of wraps. Quick craft math.
Enter your exit weight and canopy size to calculate wing loading. Helps determine if you're within the safe recommended range.
Estimate how much rope you need to restring a djembe and the number of verticals. Get traditional Mali weave instructions.
Compute the Euclidean distance between two points in 2D or 3D space. Also shows midpoint. Quick geometry helper.
Calculate probability of k successes when sampling without replacement. Useful for quality control and card games.
Select month and hour to see a simple star map with major constellations labeled. Educational astronomy fun.
Calculate grout needed (lbs or kg) based on tile size, grout joint, and area. Also recommend spacer size. Local estimator.
Type a line and see syllable count as you write. Generate nature-themed prompts. Poetry aid.
Quick reference for frequently used Git commands with examples. Searchable and categorized. A handy resource for all developers.
Enter a package name and version range to see all satisfying versions from the registry. Understand ^ and ~.
Enter row length and seed spacing to calculate how many seeds/packets to buy. Reduce waste.
Calculate how many vegetable plants fit in a given area using square foot gardening or row spacing. Visual plant grid. Plan your spring garden.
See planets and orbits at true scale (or logarithmic). Scroll from the Sun to Pluto. Understand space distances. Canvas.
Generate a realistic‑sounding exoplanet designation (e.g., Kepler‑442b) and a sci‑fi planet description. For worldbuilding.
Enter area to calculate how many epoxy floor kits you need. Consider priming coat.
Enter container height and get recommended depths for each layer (drainage rock, charcoal, moss, soil). Build a healthy miniature ecosystem.
Get a practical, random houseplant care tip. Improve your green thumb. All static data.
Enter tank volume and recommended dose to find exact ml or capfuls needed. Avoid overdosing fish.
Calculate how much liquid fertilizer concentrate to add per gallon of water based on desired N concentration.
Enter pond volume and product concentration to determine safe ml or teaspoon of algaecide.
Build perfect Open Graph meta tags for rich social media previews. Preview how your link will look on Facebook and LinkedIn. Structured data tools for better CTR.
Calculate water volume for flushing soil based on pot size. Includes recovery timeline reminders.
Enter a date and location to see moonrise/set times and azimuths. Essential for planning moonlit landscapes.
Calculate how much water to change weekly to keep nitrates under control. Based on current nitrate level, desired level, and tank volume.
Enter any two variables (speed, distance, time) and get the third. Supports mph, km/h, m/s and multiple units. Practical for runners and drivers.
Select a vegetable and see its best companion plants and which to avoid. Visual grid with quick reference. Improve garden yield and health naturally.