Firsthand Bitcoin · Data · Bitcoin miners
Data / Mining difficulty / 2021
Bitcoin mining difficulty since 2013, stepping at every retarget.
Mining difficulty opened 2021 at 18.60T (January 1, 2021) and closed at 24.27T (December 31, 2021), up 30.5%. The high was 25.05T on May 13, 2021 and the low 13.67T on July 17, 2021.
| Month | Month end |
|---|---|
| January 2021 | 20.82T |
| February 2021 | 21.72T |
| March 2021 | 21.87T |
| April 2021 | 23.58T |
| May 2021 | 21.05T |
| June 2021 | 19.93T |
| July 2021 | 14.50T |
| August 2021 | 17.62T |
| September 2021 | 19.00T |
| October 2021 | 21.66T |
| November 2021 | 22.34T |
| December 2021 | 24.27T |
Every 2,016 blocks — roughly two weeks — the network resets how hard it is to find a block so that one arrives about every ten minutes. When hashrate has grown, difficulty goes up; when machines switch off, it comes down.
Other years: 2026 · 2025 · 2024 · 2023 · 2022 · 2020 · 2019 · 2018 · 2017 · 2016 · 2015 · 2014 · 2013
Also in 2021: Bitcoin price · Distance from the all-time high · 200-day and 200-week averages · Network hashrate · Difficulty adjustments · Fees paid to miners · Transactions per day · Hashprice · Miner revenue · Bitmain releases and the bitcoin price · Break-even electricity price · What a bitcoin costs us to mine, against the market