Easter Date Finder - Online Computus Algorithm for Any Year
Find the date of Easter Sunday for any given year. Learn about the computus algorithm. Simple and accurate.
UD5 Toolkit
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Find the date of Easter Sunday for any given year. Learn about the computus algorithm. Simple and accurate.
Log your daily mood and view trends on a calendar. Encourages mindfulness. Data stored only in your browser's localStorage for complete privacy.
Estimate due date from last menstrual period or conception date. Uses Naegele's rule and shows week-by-week milestones. Local calculator for informational use.
Log medications daily with dose, time. See missed doses. Reminder for refill date. Data local.
Learn to identify the 10 basic cloud types from photos. Self‑test quiz mode. Useful for pilots and hikers.
Full-featured scientific calculator with trigonometric, logarithmic, and exponential functions. Clean interface and keyboard support. No installation required.
Enter your altitude to see corrected temperatures for thread, soft ball, hard crack, etc. Essential for high‑altitude candy.
Select a date, time zone, and locale to see how it appears in various formats (long, short, etc.). Ensure correct i18n.
Paste a URL and see the og:title, description, image, and twitter card that will be used when shared. No server needed.
Accurate online stopwatch with lap and split time capabilities. Start, pause, and reset. Ideal for sports and presentations. Runs natively in the browser.
Click through the rock cycle to see how each rock type transforms into another. Animated arrows and descriptions.
Simulate an earthquake alarm with a countdown and visual instructions for Drop, Cover, and Hold On.
Estimate monthly mortgage payments with amortization schedule. Input loan amount, interest rate, and term. All calculations performed securely on your device.
Select a latitude to see a 2D sun path chart for solstices and equinoxes. Passive design tool.
Enter a chemical formula (e.g., H2O, C6H12O6) and calculate its molar mass. Handles parentheses and hydrates. Pure frontend.
Pick a color for each day's mood and see a month‑at‑a‑glance heatmap. Data stored locally. A private emotional log.
Record shedding intensity and grooming sessions. Predict heavy molt periods. Reduce risk of wool block.
Enter total drive time or playlist length to figure out how many songs you need. Convert time to estimated tracks.
Convert angles between degrees, radians, and grads. Quick reference for mathematics and engineering. Simple and ad-free.
Enter the initial amount, half‑life, and time to find remaining quantity. Nuclear science helper.
List assignments with estimated minutes. See total time and break into Pomodoro sessions. Stay motivated.
Calculate your weekly, monthly, or annual pay based on hourly wage and hours. Include overtime rates. Accurate and private.
Display a dynamic list of keyboard shortcuts for the current browser and operating system. Filter by category. Keep it open for reference.
Calculate semester or cumulative GPA on a 4.0 scale. Add courses, credit hours, and letter grades. Instant calculation. No data storage.
Extract the thumbnail image for any YouTube video by pasting its URL. Download in multiple resolutions (HD, SD). Simple and fast.
Calculate the time needed to deposit a certain mass of metal using current. Chemistry lab tool.
Follow an interactive temperature curve for dark, milk, or white chocolate. Set timers for each phase to achieve perfect temper without a machine.
Answer yes/no questions about color, hardness, streak, luster to narrow down common rocks and minerals.
Enter a URL and see a preview of how it will appear when shared on Facebook, Twitter, LinkedIn. Detect missing tags.
Select species (Syrian, Dwarf) to get optimal sand bath frequency and duration. Keep your hamster's coat clean.