Mempool Status

Live view of pending Bitcoin transactions

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Last Block
#966,623 - 9m ago
Size
1.59 MB
1.00 MB vSize
Transactions
6,345
confirmed
Mempool
Unconfirmed transactions
Pending Tx
28,959
~11 blocks to clear
Virtual Size
10.34 MB
Ø 0.4 KB / tx
Fee Distribution
Transactions grouped by fee rate
High Priority
<Infinity sat/vB
4,343 tx
15%
Medium Priority
0.597-1 sat/vB
7,239 tx
25%
Low Priority
0.3-0.597 sat/vB
8,687 tx
30%
Next Block
5-0.3 sat/vB
5,791 tx
20%
Low Fee
<5 sat/vB
2,895 tx
10%
About the Mempool

The mempool (memory pool) is the collection of all unconfirmed Bitcoin transactions waiting for a miner to include them in a block.

Understanding the metrics:

  • Pending Transactions: Total number of unconfirmed transactions waiting in the mempool.
  • Blocks to Clear: Estimated number of blocks needed to process all pending transactions. Calculated from the total mempool vsize divided by ~1 MB block capacity.
  • Virtual Size (vSize): Total size of all transactions in the mempool, weighted for SegWit efficiency. Each block can hold up to ~4 MB vSize.
  • Last Block Size: The actual size and vSize of the most recent mined block. Updates every ~10 minutes with each new block.
  • Avg Transaction Size: Average size per transaction currently in the mempool. Smaller transactions allow more to fit in each block.
  • Fee Rates: Measured in satoshis per virtual byte (sat/vB). Higher fee rates get priority for inclusion in the next block.

Note: The number of transactions per block varies (typically 1,500-3,500) based on transaction types and sizes. SegWit transactions are more space-efficient than legacy transactions. Miners may not always fill blocks to maximum capacity.