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Bitcoin Solo Mining Calculators

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Block Finding Probability

Calculate your odds of finding at least one block given hashrate and duration

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Hashrate must be greater than 0
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Duration must be greater than 0
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Difficulty must be at least 1
Probability of ≥1 Block 9.45%
Expected Blocks (λ) 0.099
Probability of 0 Blocks 90.55%
Probability of Exactly 1 Block 9.00%
Probability of 2+ Blocks 0.49%
Using difficulty: 141.67T
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Time to Block

Calculate expected time to find your first block

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Hashrate must be greater than 0
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Difficulty must be at least 1
Expected Time to Block 74 days
Probability within 1 day 1.34% 1 in 75
Probability within 1 week 9.04% 1 in 11
Probability within 1 month 33.47% 1 in 3
Probability within 1 year 99.25% 1 in 1
Using difficulty: 141.67T
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Target Share Calculator

Calculate expected time to solve a block at network difficulty

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Hashrate must be greater than 0
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Difficulty must be at least 1
Expected Time to Block 74 days
Probability within Expected Time 63.21%
Median Time (50% probability) 51 days
Using difficulty: 141.67T
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Best Share Calculator

Calculate probability of finding a share above target difficulty

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Hashrate must be greater than 0
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Duration must be greater than 0
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Difficulty must be at least 1
Probability of ≥1 Share 3.20%
Expected Shares 0.033
Median Expected Best Share -
Best Share Percentile -
Using difficulty: 141.67T
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Glossary

Hashrate
The computational power of mining hardware, measured in hashes per second (H/s). Represents how many attempts your miner makes per second to find a valid block. Common units: TH/s (terahash), PH/s (petahash), EH/s (exahash).
Difficulty
A measure of how hard it is to find a Bitcoin block. The network automatically adjusts difficulty every 2016 blocks (~2 weeks) to maintain a 10-minute average block time. Higher difficulty means more computational work is required.
Lambda (λ)
The expected number of blocks you'll find in a given time period. Calculated as (your hashrate / network hashrate) × (time / 600 seconds). Used in Poisson distribution to calculate probabilities.
Poisson Distribution
A probability distribution that models the number of events (blocks found) in a fixed time period. Perfect for Bitcoin mining because block discovery is a random process with a known average rate.
Expected Value
The average outcome you can expect over many trials. For mining, it's the mean time to find a block. Note: actual results vary significantly - you might find a block much sooner or much later than expected.
Exponential Distribution
A probability distribution that models the time between events in a Poisson process. Used to calculate the probability of finding a block within a specific timeframe. The median time is always 69.3% of the expected time.
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