How to Verify Successful Battery Calibration

Hello. I just installed a new battery in my 2015 MacBook Air 11”. It seems to be holding a charge fairly well. My question is- how do I verify if I calibrated the battery correctly? Without performing any tasks, at first it was showing about 6 hours remaining, then 3, then 1.5. Now it shows 8 hours & 19 minutes. Sometimes it’s just stuck on calculating. What should I expect to see? And should that number remain fairly consistent? 

Thanks for your help!