With this calculator, you can calculate the daily earnings from mining.

For example, in April 20th, 2020, if you use the Whatsminer M20S++ 112T (112 TH/s @ 3472W) with an electricity cost of $0.05/Kw you can mine 0.001931 bitcoin (which is worth 13.81USD) in one day.  You will see the details as the picture showns below.

 

However this calculation might be outdated as Bitcoin’s difficulty changes every two weeks. It’s best to run a new calculation before starting to mine with updated stats.