Bitcoin Mempool & Fee Market Dashboard

How the Bitcoin Mempool & Fee Market Dashboard works

This dashboard shows the size of Bitcoin’s pending-transaction pool and estimated fee rates (sat/vB) for several confirmation targets, so you can judge congestion before sending. Data comes from a Bitcoin Core node when one is configured, with a public fallback source.

What you enter

• None; the data refreshes automatically.

What it shows

• Pending transactions, virtual size (vMB), total attached fees (BTC), node minimum fee (sat/vB) and data source
• Confirmation-target fee curve in sat/vB (1, 2, 3, 6, 12 and 24 blocks from Bitcoin Core; 1, 3, 6, 12 and 24 from the public fallback)
• Typical SegWit transfer cost at the 1-block rate (141 vB) in sats and USD
• Mempool memory use versus the maximum

How to use it

1. Check pending transactions and virtual size (vMB) to gauge congestion.
2. Read the fee curve for your confirmation target, for example 1 block versus 6 blocks.
3. Use the "Typical SegWit transfer, fast" card for a quick cost estimate.
4. Compare with the node minimum fee to see the lowest rate that relays.
5. For your exact transaction size, continue to the Bitcoin Transaction Fee Estimator.

Formula

Typical fast fee (sats) = 1-block sat/vB × 141 vB; BTC = sats ÷ 100,000,000; USD = BTC × live BTC price.

Worked example

If the 1-block estimate is 20 sat/vB: 20 × 141 = 2,820 sats = 0.0000282 BTC. At a hypothetical BTC price of $100,000, that is 0.0000282 × 100,000 = $2.82.

How to read the result

• A wide gap between the 1-block and 24-block rates means urgency is expensive.
• Rising vMB with rising fees signals more competition for block space.
• If you are not in a hurry, a lower target with RBF lets you bump the fee later.

Limits and cautions

• Fee estimates do not guarantee confirmation within the target.
• Fees can change quickly between checking and broadcasting.
• Your actual fee depends on your transaction’s real virtual size.

Common questions

What does sat/vB mean?

Satoshis per virtual byte, the fee rate miners use to prioritize transactions. Total fee = rate × your transaction’s virtual size.

What is the Bitcoin mempool?

The set of valid transactions waiting to be included in a block. Its size shows how much demand is competing for block space.

What if my transaction is stuck?

If your wallet supports RBF, rebroadcast it with a higher fee; otherwise CPFP lets you or the recipient spend an output with a high fee to pull it through.