# Difficulty Adjustment

Source URL: https://help.blockstream.com/education/glossary/difficulty-adjustment
Updated: 2026-05-26T17:23:39.000Z
Letter: D

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Bitcoin’s mechanism to automatically adjust the computational effort required for mining every \~2,016 blocks to maintain a \~10-minute block time.

**Key Takeaways**

- Ensures Bitcoin’s [blockchain](https://help.blockstream.com/education/glossary/blockchain) maintains consistent block production.
- Adjusts every \~2,016 blocks (\~2 weeks) based on total network [hashrate](https://help.blockstream.com/education/glossary/hashrate).
- Reinforces Bitcoin’s decentralized security and resistance to manipulation.
- A cornerstone of Bitcoiners trust in [proof-of-work](https://help.blockstream.com/education/glossary/proof-of-work).

**In-Depth Explanation**

The difficulty adjustment is a critical feature of Bitcoin’s proof-of-work consensus mechanism, ensuring that new [blocks](https://help.blockstream.com/education/glossary/block) are added to the blockchain approximately every 10 minutes, regardless of changes in the network’s hashrate. Every \~2,016 blocks (roughly two weeks), the Bitcoin protocol recalculates the difficulty target based on the time taken to mine the previous blocks, increasing it if blocks were mined too quickly or decreasing it if too slowly. This self-regulating system maintains Bitcoin’s predictable issuance schedule and security, distinguishing it from centralized or other networks.

Navigation: Blockstream Help Center > Education > Glossary > Difficulty Adjustment

## Related Terms in This Letter
- [Decentralization](https://help.blockstream.com/education/glossary/decentralization)
- [Diceware](https://help.blockstream.com/education/glossary/diceware)
- [Difficulty Adjustment](https://help.blockstream.com/education/glossary/difficulty-adjustment) (current)
- [Digital securities](https://help.blockstream.com/education/glossary/digital-securities)
- [Dynamic Federations (DynaFed)](https://help.blockstream.com/education/glossary/dynamic-federations-dynafed)