Mempool Status

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 holds up to 1 million vBytes (4 million weight units).
• 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.