How do you calculate mining difficulty?

Difficulty Adjustments At the beginning of every epoch the Bitcoin network recalculates the Current Target. The network does this by summing the total minutes it took to mine the last 2,016 blocks . It then compares this total to a desired rate of 20,160 minutes (10 minutes times 2,016 blocks).

Cryptocurrency difficulty is a measure of how difficult it is to mine a block in a blockchain for a particular cryptocurrency . A high cryptocurrency difficulty means it takes additional computing power to verify transactions entered on a blockchain—a process called mining.

Ethereum difficulty (or network difficulty) is a key value for every cryptocurrency. Ethereum Network difficulty is the difficulty of a problem that miners must solve to find a block. The more miners are mining Ethereum the more difficult it is to find the block to be rewarded .