How to get MacBook battery back up to 100% for calibration

I want to calibrate my MacBook's battery, but the MacBook is already connected to the charger and only displays a 95% charge.
What should I do to bring it back up to 100% (the first step in calibrating)?
Should I just disconnect the MacBook from the charger and let the battery run down for a while, then reconnect it?
If not clear, although already connected to the charger (which is how I use the MacBook nearly all the time) the battery is not increasing its charge, but rather the charge has been slowly declining. So leaving the MacBook on the charger won't, as far as I know, get the charge back up to 100%. It seems I have to do something else to make that happen. I assume that means putting it on battery power for a while, then reconnecting it to 'force' it to charge back up to 100%, but I'm not sure.
Is there a way to get it up to 100% without using the battery?
Thanks.

To initiate the charging cycle you need to get the percentage below 93% as stated in the article. It may not specifically mention disconnecting it to accomplish this, but I can think of no other way.
When I shut down yesterday, my MacBook was at 95%. When I powered on this morning, the battery level was up at 100%. Presumably while powered off the battery hit 93% and then went back up to full charge.
I had not disconnected from the charger, so I guess that's not required unless one for some reason specifically wants to force the battery level down to 93% before it gets there 'on its own.'
That the recharging to full capacity can occur with the charger connected seems to make sense since even while the MacBook is connected to the charger the battery is slowly losing charge, and will keep going down until it hits the level (i.e., 93%) that Apple has apparently determined to be the one to trigger recharging.
Thanks for your replies.

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How to get MacBook battery back up to 100% for calibration

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