This {Remaining Time} Calculator calculates tend using linear extrapolation.
t0 is the time at which measurement started. Fill the
corresponding progress into p0. When more progress has
been made, fill out the middle column. The tend value
is now automatically calculated.
t0
t1
tend
Time:
Progress:
p0
p1
pend
Result
start =
= t0
elapsed =
= t1 - t0
rate =
= (p1 - p0) / elapsed
remaining =
= tend - t1
total =
= rate × (pend - p0)
finish =
= t0 + total
Visually truncate to decimal(s).
Colon notation always truncates.
Usage notes
Inputs are evaluated as JavaScript to support entering e.g. 23*3600.
Only [0-9 :./*+-] is allowed to prevent self-xss.
A start time in the past works fine if you know what the progress was back then.
You can enter it as negative value, or use the wall clock time from 2 hours ago.
Colon notation
For convenience, the first colon is replaced with +1/60* and the
second with +1/3600*, such that hh:mm and hh:mm:ss will parse. The
output unit will be that of the largest position (hours in the case of hh:mm
or hh:mm:ss, minutes in the case of mm:ss).
Entering 0:5 is the same as 0:05 or 1/60*5.
Days (dd:hh:mm:ss) are not supported.
Old screenshots of this tool
This first set was used to explain how to use it:
