Difficulty
Bitcoin mining difficultydifficultyA protocol setting that adjusts every ~2 weeks to keep blocks arriving about every 10 minutes, rising and falling with hashrate.See it on the site → — the self-adjusting target that holds block times near ten minutes — with all-time-high context and history.
Difficulty stands at 140.6 T, 9.9% below its all-time high. It re-adjusts about every two weeks and marks a floor on the honest mining effort behind each block — not the dollar cost to attack the chain.
History
Exact protocol value from mempool.space (public/btc-difficulty.json), as of 2026-10-19. It only moves once per ~2-week adjustment; not live.
How it's computed
Difficulty is an exact protocol value carried in every block header. It re-adjusts every 2,016 blocks (~two weeks) so that, at the epoch's hashratehashrateThe total computing power securing the Bitcoin network, in hashes per second — a measure of how much work backs the chain.See it on the site →, blocks are found about every ten minutes. We read the latest value and the history from mempool.space (a weekly snapshot). Shown in T — the raw difficulty divided by one trillion.
Why there's no band
No cheap-or-expensive zone here. Difficulty, hashrate, hashpricehashpriceWhat a miner earns per unit of hashpower per day — revenue divided by hashrate. It falls as competition rises or price drops.See it on the site → and production costcost of productionAn estimate of the electricity cost to mine one bitcoin, from difficulty and rig efficiency. A soft, reflexive floor — not a hard one.See it on the site → describe the state of the network, not whether bitcoin's price is high or low, so each shows a value and a date but no colour-coded range.