Bitcoin Forum

How to calculate how much money a mining machine can earn per day?
Can you recommend me some mining computing websites?

Try whattomine or nicehash, or just google it for more. It is easy to find them, just search with "mining calculator". Spend some time on the mining board and look around, there are also tons of threads talking about them. Just need a little bit of your time to scroll and read.

Almost all online calculators are somehow accurate, viabtc has a nice little tool https://www.viabtc.com/tools/calculator?symbol=BTC which I prefer to use, the good thing about it is the fact that you can change all variables such as fees, difficulty, and price (most online calculators don't let you do that).

It's important to be able to change those variables, as I type, the difficulty is adjusting in about 14 hours (https://www.viabtc.com/tools/calculator?symbol=BTC), with at least 13% to the upside, the current difficulty on all those online calculators is 31360548173144 but in 14 hours it will be 35645328467032 which is roughly 13% less profit.

Well, there are actually quite a lot of mining calculators, you just need to choose the one that you find convenient and informative, for example, here are a few of them, just choose what you are going to do with mining:
https://cryptorival.com/calcs/
https://www.cryptocompare.com/mining/calculator/btc?HashingPower=40&HashingUnit=TH%2Fs&PowerConsumption=1500&CostPerkWh=0.12&MiningPoolFee=1
https://whattomine.com/coins
https://www.coinwarz.com/
https://insights.braiins.com/en/profitability-calculator

Is there a mining calculator for efficiency ghs-watts = joules and sols to watts = joules ?

I have been building a database for antminer z9 and Canaan A851's trying to tune and find most energy efficient settings but have been questioning myself on wether my math is correct.