Yup you can meaure out, and measure in.
Or Most oil tubs have rough markings on the side.
So once I've drained the oil and changed the filter, using a funnel I'll pour in the oil till I've put a good couple litres in, then bit by bit till I cover the bottom marker in the window. Start bike and run for half a minute to fill the filter. Quickly top up bit by bit till I've clearly covered that bottom mark again. The bike now has enougth oil to run safely.
However it's now got cold oil all round the engine, that'll take time to all drain into the sump. So whether I take it for a run or not straight after the oil change, I'll let it sit overnight on the centre stand, all oil will be in the sump come morning, and then I'll top up to the max mark - particulary so as the gen1 thous like it up to the upper mark.