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Bitcoin fee estimator

What a Bitcoin transaction costs right now, at each confirmation target — in satoshis per virtual byte, in total satoshis, and in dollars. Adjust the size to match your own transaction.

Transaction size (virtual bytes)

A one-input, two-output native SegWit spend is about 141 vB. More inputs means a larger transaction and a higher total fee at the same rate. Legacy addresses are substantially larger.

Bitcoin fee tiers and estimated cost
Confirmation target	Espera típica	Tasa	Comisión	Approx. USD
Próximo bloque	~10 min	3 sat/vB	423 sats	$0.33
Prioridad alta	~30 min	1 sat/vB	141 sats	$0.11
Prioridad media	~1 hora	1 sat/vB	141 sats	$0.11
Económica	horas	1 sat/vB	141 sats	$0.11
Retransmisión mínima	puede no confirmarse	1 sat/vB	141 sats	$0.11

Current mempool conditions

Unconfirmed transactions 76,530

Waiting size 42.2 vMB

Aproximadamente 42.2 blocks

How Bitcoin fees actually work

Every block holds a fixed amount of space. When more transactions want in than fit, they compete on tasa de comisión — satoshis per virtual byte — and miners take the highest bids first. What matters is the rate, not the total: a large transaction paying a big total fee can be less attractive than a small one paying less, because block space is what is scarce.

Why your fee may differ

Transaction size depends on how many inputs it consumes and what address types are involved. Consolidating many small UTXOs makes a large transaction; a native SegWit spend is meaningfully cheaper than a legacy one for the same economic action. Wallets that quote a flat fee are quoting an estimate for an assumed size.

If a transaction gets stuck

Fee rates can rise after you broadcast. If your wallet signalled replace-by-fee you can rebroadcast the same spend at a higher rate. If you control an output of the stuck transaction — usually the change — you can instead spend it at a high rate so miners take the pair together. Neither is a guarantee, and neither requires paying anyone a "fee-acceleration" service.

Estimates, not guarantees. These figures come from current mempool conditions and can change within minutes. A transaction that looks well-priced now can be stranded by a burst of demand. Nothing here is financial advice.

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