TLDR
Blob fees rose from a near zero floor to a level tied to Ethereum L1 gas. The new minimum is about 1 divided by 15.258 of the execution base fee per EIP-7918, restoring a real market for blobs (report).
- Mechanism: the blob base fee now has a floor at roughly 1 divided by 15.258 of L1 base fee, replacing the 1 wei floor (report).
- Observed: one outlet noted an initial jump of about 1,500 times immediately after activation, from 1 wei to around 1,500 wei (coverage).
- Purpose: fix the blob fee market that often sat at 1 wei and re link costs to usage, aiding ETH burn and predictability (analysis).
Deep Dive
1. How The Floor Works
The upgrade introduces a reserve price for blob fees, setting the minimum blob base fee to approximately 1 divided by 15.258 of the L1 execution base fee. This ties data availability costs to actual mainnet conditions instead of a near free fixed minimum, which previously left blob fees stuck at 1 wei in quiet periods (report).
This change is designed to keep the blob market functional, prevent congestion driven by underpriced blobs, and make revenue and ETH burn more consistent across demand regimes (analysis).
The magnitude of the rise depends on L1 gas at the time. When L1 gas is higher, the blob fee floor rises proportionally.
2. What Was Observed
Right after activation, one outlet reported a jump of about 1,500 times, from 1 wei to roughly 1,500 wei, illustrating how fast the new mechanism pulled blob fees off the previous floor (coverage).
Independent analysis emphasized the goal rather than a single number, noting blob prices had been largely immaterial and that the reserve price was introduced to stop the market collapsing to near zero and to restore pricing power in response to demand (analysis).
Use the rule of thumb rather than any single print. The steady state level you see day to day will track L1 base fee, not a one time shock number.
3. Why It Matters
With a real floor, blob pricing can regulate rollup data demand, improving predictability for L2 operators and strengthening ETHs value capture through more consistent burn when blobs are used (analysis).
This should reduce fee whiplash between quiet and busy periods and align costs paid by rollups with the resources their blobs consume on L1 (analysis).
For users, L2 fees should become more stable relative to L1 conditions. For analysts, the key driver to watch is L1 base fee, since the blob floor is pegged to it.
Conclusion
Blob fees rose materially because a floor now ties them to L1 gas. The exact size at any moment depends on the L1 base fee, but the direction is clear and by design. This restores a functioning market for blobs, improves cost alignment for rollups, and can make ETH burn more responsive to real usage.
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