Projected block 11.00 vMB
4.93 sat/vB
Median fee rate
Fee range3.076–469.974 sat/vB
transactions3,469
The cost of getting confirmed
Bitcoin Mempool Fees
Current fee estimates, the waiting queue, and what your transaction may cost.
Fees updated
Time targets are estimates. New transactions and mining pace can change the wait.
Unconfirmed transactions84,917
Queued virtual size41.18 vMB
Source minimum estimate1 sat/vB
This is one node’s view of the queue. Wallet and node relay policies can differ.
Mempool snapshot
PLAN THE NETWORK FEE
Transaction fee calculator
Use your wallet’s virtual size for an exact calculation.
Estimated network fee
140 sats
0.00000140 BTC
2973 VND
140 vB × 1 sat/vB
Fee = sat/vB × virtual bytes, rounded up to a whole satoshi.
Fiat rate updated
01 / THE QUEUE
Projection updated 16:30 UTCWhat may fit next
Projected groups of transactions, ordered by the source’s block-building model.
Projected block 21.00 vMB
2.009 sat/vB
Median fee rate
Fee range1.027–3.076 sat/vB
transactions4,002
Projected block 31.00 vMB
0.4 sat/vB
Median fee rate
Fee range0.316–1.03 sat/vB
transactions5,935
These are projections, not mined blocks. Miners can choose a different set of transactions.
02 / THE LAST 24 HOURS
How fees have changed
Recorded fee changes in sat/vB. Steps connect the last known recommendations.
High priorityStandardLow priority
Hover or tap to see recorded fees. Use Left/Right, Home or End with the keyboard.
All times are UTC. The line stops at the latest fee snapshot; missing observations are not invented.
03 / HOW FEES WORK
Size × rate. That’s the fee.
You pay for the space your transaction uses. Sending more BTC does not, by itself, make the fee higher.
ceil(sat/vB × vB) = fee in sats
01
Virtual bytes, explained
Virtual size is transaction weight divided by four, rounded up. Inputs, outputs and their scripts change the size. A wallet can estimate it before you send.
02
Why the queue matters
Unconfirmed transactions wait in nodes’ mempools. When more compete for block space, a higher fee rate can help a transaction get selected sooner.
03
An estimate, not a deadline
Recommendations use the source’s projected blocks and fee policy. Blocks arrive at uneven intervals, and new transactions can overtake yours.
Waiting for a payment? Use the transaction checker to check its status and the wallet finder to compare wallet options.
Estimate input costs and consolidation savings with the Bitcoin UTXO calculator.
Fee and mempool data: mempool.space ↗·Virtual-size definition: BIP 141 ↗
A few quick answers
What does sat/vB mean?
Satoshis per virtual byte. It is a fee rate, not the total fee. Multiply it by your transaction’s virtual size, then round up to a whole satoshi.
How much is a Bitcoin transaction fee?
It depends on the fee rate and transaction size. For example, 140 vB at 2 sat/vB costs 280 sats, or 0.00000280 BTC. The calculator shows the current fiat estimate.
Does a higher fee guarantee the next block?
No. New transactions, miner choices and the time until the next block can change confirmation timing. These recommendations are estimates.
Why is the minimum estimate different from my wallet?
The source’s recommendation is not a universal network minimum. Wallets and nodes can use different fee rounding, relay policies and local mempool limits.