Or use ,5 or .5 or 30 minutes

A half hour.

Or use 1,5 or 1.5 or 1 hour 30 minutes

One and a half hour.

Or use from 8 to 16 or 8 4pm

Eight hours.

Or use from 8 or since 8am

From eight until now.

Or use 0:00 or [blank field] or + at the end

Quickstart: To create a time entry with a running timer.

Or use 8 to 4pm minus 0:30 or 8 16 -0,5 +

Time frame: Eight hours minus 30 minutes (e.g. lunch).

Or use 0.5 + 1,0

Sum: For one and a half hours.

Or use 2 - 0,5

Difference: For one and a half hours.

Or use 2*4 or 1*2*4

Product: For eight hours.

Or use 3/0.5

Quotient: For six hours.

Or use (8 to 4pm -0,5) * 2.0 or (8 to 4pm -0,5*2) / (1 + 1)

Some Combined Examples.