Elapsed Time Calculator - Online Duration Between Dates/Times
Enter two date‑time values and get the exact years, months, days, hours, minutes difference. Word output also.
UD5 Toolkit
Set your custom event date and track every second until the big moment arrives. Free online event countdown timer with real-time updates.
Counting down to January 1, 2025 at 12:00 AM
The countdown has reached zero. Set a new date to start another countdown.
Use our free online countdown timer to track days, hours, minutes, and seconds until any future event. Perfect for counting down to holidays, birthdays, anniversaries, vacations, product launches, project deadlines, and more. Features include preset holiday events, custom date selection, real-time second-by-second updates, and a fullscreen display mode.
Enter two date‑time values and get the exact years, months, days, hours, minutes difference. Word output also.
Convert minutes to decimal hours and vice versa. Essential for billing and payroll. Instant conversion with a handy chart.
Add or subtract days, weeks, and months to find a future or past date. Also compute duration between two dates. Essential for project planning.
Enter a URL and click to check if it's reachable from your browser (CORS-limited, uses no-cors fetch). Quick manual test. Local only.
Send HEAD requests to popular websites and measure the round‑trip time. Quick network health check. Client‑side.
Calculate with binary numbers: addition, subtraction, multiplication, and division. Also bitwise AND, OR, XOR. Programmer's tool, fully client-side.
Calculate your Basal Metabolic Rate using the Mifflin‑St Jeor equation. Know how many calories you burn at rest. All data private.
Set media metadata and play/pause controls for the OS media widget. Test action handlers. Perfect for web audio apps.
Log your coin collection with year, mint, and grade. Filter and sort. Data stored in localStorage. For numismatists.
Reference diagrams for USB‑A, USB‑C, micro‑USB pinouts. See wire colors and signal descriptions. Hardware hacking helper.
Calculate the buying power of US dollars between any two years using official CPI data (updated annually). See how inflation erodes purchasing power. Local.
Convert between common cooking units: cups → grams, teaspoons → ml, Fahrenheit → Celsius. Essential baking tool.
Paste a recipe ingredient list and double, triple, or scale to any serving size. Rounds fractions intelligently. Save your scaled recipes locally.
Convert a stereo audio file to mono. Also swap or extract left/right channels. Quick podcast preparation. Browser-based.
Select original key and capo position to see the resulting chord shapes. Keep playing in the original key without barre chords.
Convert network and data transfer speeds: bps, Kbps, Mbps, Gbps, KiB/s, MiB/s. A must when comparing internet plans. Fast and local.
Play reference pitches for standard ukulele tuning. Also works for baritone and other variations. Simple and local.
Use priming sugar calculator adapted for kombucha. Prevent bottle bombs. Enter volume and desired fizz.
Select component type and solder to see recommended iron temperature and tip shape. Avoid cold joints.
Find the correct wire gauge for speaker cables based on length and speaker impedance to avoid signal loss. Quick audio reference. Local.
Calculate the salt percentage by weight for your vegetable ferments. Avoid mushy or unsafe ferments. Supports both dry salting and brine methods.
Play left‑only, right‑only, and frequency sweeps to test your speakers or headphones. Quick audio check.
Reference for standard blanket and afghan sizes in inches and cm. Perfect for knitters and crocheters.
Paste your speech, set time limit, and practice with a pacing indicator (words per minute). Refine delivery.
Press any key to see the complete KeyboardEvent properties: key, code, keyCode, modifiers. Indispensable for game & shortcut developers.
Find out what day number of the year any date is (1‑366). Also shows days remaining. Simple reference.
Paste a human‑readable date (like 'next Friday' or 'March 5, 2023') and convert it to ISO 8601 format. Quick and tolerant.
Create a pure CSS countdown timer with a flipping number effect. Adjust duration and style. No JavaScript needed for display.
Calculate the exact number of days, weeks, months, and workdays between two dates. Visual calendar highlights. Perfect for projects.
An animated hourglass that you can set for any time. Watch the sand flow. Beautiful and calming timer.