Firsthand Bitcoin · Data · Bitcoin miners
The number of unspent transaction outputs, the pieces every bitcoin is stored in.
Unspent outputs (UTXO set) opened 2025 at 187.02M (January 3, 2025) and closed at 166.74M (December 30, 2025), down 10.8%. The high was 187.02M on January 3, 2025 and the low 165.63M on December 25, 2025.
| Month | Month end |
|---|---|
| January 2025 | 183.18M |
| February 2025 | 180.25M |
| March 2025 | 174.44M |
| April 2025 | 175.65M |
| May 2025 | 171.61M |
| June 2025 | 168.89M |
| July 2025 | 168.81M |
| August 2025 | 169.06M |
| September 2025 | 168.36M |
| October 2025 | 167.70M |
| November 2025 | 166.76M |
| December 2025 | 166.74M |
Bitcoin is not stored in accounts but in unspent outputs, each one a lump of coins that a future transaction will spend. The count grows with adoption and jumps during inscription waves, when many small outputs are created.
Other years: 2026 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2015 · 2014 · 2013
Also in 2025: Bitcoin price · Distance from the all-time high · 200-day and 200-week averages · Network hashrate · Mining difficulty · Difficulty adjustments · Fees paid to miners · Transactions per day · Hashprice · Miner revenue · Miner prices per terahash · Bitmain releases and the bitcoin price