ClockCalc Runner 0.2
Now you can calculate times!
So if you want to calc 23s + 1m 23s you can simple type ti :23+1:23 in Krunner and get the result.
If you work with ':' you can let the leading 'ti' simply away.
To install the runner script just type in the terminal:
plasmapkg -i clockcalc.zip
After that you have to restart KDE or only krunner.