Bitcoin Mining Difficulty Jumps 3.87% to 138.97T as Hashrate Rebounds

The April 3, 2026 retarget reverses a bruising 7.7% March decline, restoring competitive pressure on miners whose block times had fallen well below the 10-minute target.

What the Numbers Show

Bitcoin’s mining difficulty rose 3.87% to 138.97T at the April 3, 2026 epoch retarget. An independent pre-adjustment estimate from CoinWarz, a primary on-chain data tracker, projected the new difficulty at approximately 138.41T, a +3.45% move from the prior setting of 133.79T. The gap between the two figures reflects normal variation between projected and confirmed on-chain readings. The direction and approximate magnitude are corroborated by independent data.

The adjustment is automatic. Blockchain.com’s difficulty chart, sourced directly from Bitcoin node data, confirms the protocol recalculates difficulty every 2,016 blocks, roughly every two weeks, to hold average block production near 10 minutes.

Why Difficulty Moved Up

Block times averaged 9.67 minutes over the most recent epoch, according to CoinWarz. When blocks arrive faster than the 10-minute target, the protocol raises difficulty to slow production back toward schedule. Faster block times indicate more raw computing power on the network than the prior difficulty setting anticipated.

Minerstat, an independent mining analytics platform, measured network hashrate at approximately 1,015 EH/s as of April 3, 2026. CoinWarz separately estimated hashrate at roughly 1.001 ZH/s, equivalent to about 1,001 EH/s. Both readings sit well above the levels that produced March’s difficulty drop.

A Rebound After March’s Sharp Decline

The April adjustment follows one of the sharpest difficulty drops of 2026 so far. The network cut difficulty by 7.7% around March 20, 2026, pushing the setting to approximately 133.8T after average block times stretched to about 12 minutes and 36 seconds. That decline gave remaining miners temporary revenue relief per unit of hashrate.

The April rebound suggests miners who throttled equipment during March’s slowdown have since reconnected, restoring competition across the network.

What It Means for Miners

Higher difficulty means each unit of hashrate earns a smaller share of the block reward. With Bitcoin’s block subsidy fixed at 3.125 BTC since the April 2024 halving (the protocol’s schedule has not triggered a subsequent halving as of this writing, no official filing or exchange disclosure confirming any subsidy change was also located), and transaction fee revenue variable, tighter difficulty narrows margins for operators running older or less efficient hardware.

Several large mining firms have already been reallocating capacity toward artificial intelligence and high-performance computing, a shift that contributed to March’s hashrate decline. The April difficulty recovery signals that reallocation has not, so far, produced a sustained retreat from Bitcoin mining at the network level.

Note: The confirmed on-chain figure of 138.97T (+3.87%) is attributed to reported data at time of publication. CoinWarz’s pre-adjustment estimate of 138.41T (+3.45%) serves as the closest independently verified approximation. Readers seeking the final confirmed value should cross-check the CoinWarz difficulty chart directly after block 943,488 is finalized.