Online Stopwatch - Free Lap & Split Timer Tool
Accurate online stopwatch with lap and split time capabilities. Start, pause, and reset. Ideal for sports and presentations. Runs natively in the browser.
UD5 Toolkit
Accurate online stopwatch with lap and split time capabilities. Start, pause, and reset. Ideal for sports and presentations. Runs natively in the browser.
Countdown timer for applying a heating pad. Includes recommended max session. Prevent burns.
Look up pilot hole and clearance hole sizes for wood screws. Conversion between gauge and mm.
Enter material thickness and get the recommended pop rivet diameter and grip range.
List of major annual meteor showers with next peak date and moon phase prediction. Stargazing planner.
Select the material you're drilling into and see the recommended point angle and lip clearance. Sharpen bits correctly.
Answer yes/no questions about color, hardness, streak, luster to narrow down common rocks and minerals.
Look up manufacturer torque specs for lug nuts. Avoid warped rotors. Printable chart.
Select your OS, IDE, and programming language to generate a complete .gitignore file. No typing required.
Log medications daily with dose, time. See missed doses. Reminder for refill date. Data local.
Select a bone and see typical healing duration in weeks. Educational information only.
Log your daily mood and view trends on a calendar. Encourages mindfulness. Data stored only in your browser's localStorage for complete privacy.
Enter drum diameter, depth, and material to find the shell's approximate fundamental note. For tuning reference.
Calculate the time needed to deposit a certain mass of metal using current. Chemistry lab tool.
Track which stage of tumbling your rocks are in, record grit amounts, and get reminders for when to advance to the next grit.
Follow an interactive temperature curve for dark, milk, or white chocolate. Set timers for each phase to achieve perfect temper without a machine.
Full-featured scientific calculator with trigonometric, logarithmic, and exponential functions. Clean interface and keyboard support. No installation required.
Convert angles between degrees, radians, and grads. Quick reference for mathematics and engineering. Simple and ad-free.
Paste text, highlight important parts, and extract only highlights. Great for research and studying. Entirely client-side.
Select a date, time zone, and locale to see how it appears in various formats (long, short, etc.). Ensure correct i18n.
Enter your altitude to see corrected temperatures for thread, soft ball, hard crack, etc. Essential for highβaltitude candy.
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.
Adjust recommended tire pressure for extra load or high speed. Simple reference chart.
Calculate your weekly, monthly, or annual pay based on hourly wage and hours. Include overtime rates. Accurate and private.
List assignments with estimated minutes. See total time and break into Pomodoro sessions. Stay motivated.
Paste a simple drum tab or select a pattern and hear it played. Learn drum set notation interactively.
Advanced metronome with eighth, triplet, and sixteenth note subdivisions. Accent controls. Web Audio scheduling.
Enter release height and speed to compute the optimal launch angle for maximum distance. Simple projectile model.
Enter log pile dimensions to calculate cords and face cords. Also estimate heat content in BTUs by wood species. Local reference.
Answer questions about fit and follow visual tests to ensure your boots are the correct size.