Did you find a block?
Best Share Checker
Check if your best share was enough to mine a Bitcoin block
Bitcoin (BTC) Best Share Checker
Compare your best Bitcoin share difficulty against the live BTC network difficulty. Bitcoin's SHA-256 mining difficulty currently exceeds 100 trillion, so even a share in the trillions represents a fraction of a percent. ASIC miners like the Antminer S21 and Whatsminer M60 produce billions of hashes per second, but the vast majority of shares fall far short of network difficulty.
What Counts as a Good BTC Share?
Any share above 1T is already remarkable for a single ASIC. The expected best share grows roughly with total hashes searched, so a 200 TH/s miner would on average take months of continuous hashing to surface a 1T share. Anything approaching network difficulty would be a once-in-a-lifetime event. Use the block odds calculator to estimate how long it would take your hashrate to actually find a block.
Bitcoin Cash (BCH) Best Share Checker
Compare your best Bitcoin Cash share against the live BCH network difficulty. Bitcoin Cash uses the same SHA-256 hardware as Bitcoin but with roughly 100x less network difficulty, so the same ASIC produces shares that cover a much larger percentage of the BCH difficulty threshold.
BCH vs BTC Share Difficulty
If your best share on BTC reached 0.01% of network difficulty, that same share might reach 1% or more on Bitcoin Cash. This is why some solo miners point their ASICs at BCH instead — the same hardware has better odds per block. Use the BCH block odds calculator to see your probability over time.
What Is Share Difficulty in Solo Mining?
When you solo mine, your mining hardware repeatedly attempts to find a valid block hash. Each attempt produces a "share" with a certain difficulty level. Share difficulty measures how hard it was to find that particular hash. The higher the share difficulty, the closer you were to finding a real block.
When Does a Share Become a Block?
A share becomes a valid block when its difficulty meets or exceeds the current network difficulty. If your best share has a difficulty of 4.2T and the network difficulty is 90T, your share reached about 4.67% of what was needed — impressive, but not a block. If your share difficulty equals or exceeds the network difficulty, congratulations — you found a block.
How to Read the Percentage
The percentage shown represents how close your share came to meeting the block difficulty threshold. 100% or above means the share was a valid block. Below 100% means it was a near miss. Even small percentages against Bitcoin's difficulty represent remarkable luck — most individual shares have difficulty many orders of magnitude below the network difficulty.