Stopwatch & Timer

Whether you are tracking workout intervals, cooking the perfect egg, or managing a Pomodoro work session, having a reliable timer is essential. Our tool combines a millisecond-precise stopwatch with a customizable countdown timer.

In the early days of the web, JavaScript timers (like `setTimeout` and `setInterval`) were notoriously unreliable. They would drift significantly over time because the browser's main thread would get blocked by other tasks (like rendering images or handling scrolling).

The Solution: Delta Timing

This tool uses a technique called "Delta Timing." Instead of relying on the interval to fire exactly every 10 milliseconds, we capture a timestamp (`Date.now()`) when you click "Start." Then, on every frame update, we calculate the exact difference between the current time and the start time. This ensures that even if your computer lags, the timer remains scientifically accurate.

The need to measure short intervals of time dates back to the 18th century. The first "chronograph" was invented by Louis Moinet in 1816 for tracking astronomical objects. It was so precise it could measure time down to 1/60th of a second—a feat unmatched for decades.

Digital stopwatches revolutionized sports in the 1970s. By replacing mechanical gears with quartz crystals, accuracy jumped to 1/1000th of a second, changing the way Olympic records were recorded forever.