
Mempool Median Fee Rate orders unconfirmed transactions by their offered fee per virtual byte and takes the middle rate, in sat/vB. It describes the midpoint of pending fee bids rather than the total fees waiting.
When the median rises, higher bids have reached the middle of the queue’s fee distribution; a falling median means the midpoint is moving lower. Its recorded high was 796.9 sat/vB on April 20, 2024, while the full-history median of daily observations is about 6.21 sat/vB.
A few expensive transactions affect the median less than the mean, but shifts in the number of low-fee transactions can move it without changing urgent bids. It ignores transaction size and dependency packages. The middle bid is not a threshold that guarantees inclusion in the next block.
The median takes the middle of the ranked bids; the mean averages their rates. Extreme overbids can raise the mean sharply while leaving the median relatively stable.
No. Half of the sampled transactions being below a rate does not mean half the block space is below it. Transaction sizes, dependencies and new arrivals affect which transactions miners include.
A fee in satoshis divided by virtual size need not be a whole number. The reported daily series can therefore contain decimal sat/vB values even though the fee itself is paid in whole satoshis.