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Pull up your wallet using Sparrow Wallet and you can view the details of a UTXO (such as the size in vB).
If your UTXO is 140 vB and the fee to send is 100 sats/vB, then your fee for that one UTXO would be 140 * 100 = 14,000 sats.
If you have multiple UTXOs, you'd have to view the size of each of them, add them all together, then do the calculation.
Pull up your wallet using Sparrow Wallet and you can view the details of a UTXO (such as the size in vB).
If your UTXO is 140 vB and the fee to send is 100 sats/vB, then your fee for that one UTXO would be 140 * 100 = 14,000 sats.
If you have multiple UTXOs, you'd have to view the size of each of them, add them all together, then do the calculation.