Index / Time
Asymptotic Stopwatch
Set a target. The clock runs at true speed for the first part of it, then slows continuously so that it approaches the target without ever reaching it. Real elapsed time is shown alongside.
Settings
Target time
hours
minutes
seconds
Percent of the target run at 1.000×. After that the clock
decays exponentially with a time constant equal to the remainder.
Lower values start slowing sooner.
What it does
Below the handover the displayed time is the real time. Above it,
shown = target − (target − handover) ×
e−(real − handover) / (target − handover).
The curve is continuous and smooth at the handover, so there is no
visible jump. It is bounded below the target by construction.
Ready
0:00.0
Target 10:00.0
Real elapsed
0:00.0
Clock speed
1.000×
Popout covers the page with the clock and nothing else. Press Escape to leave it.