What Role Does Transaction Size (In Bytes) Play in the Fee Calculation?

Transaction size, measured in bytes or virtual bytes (vbytes), is the fundamental factor in calculating the transaction fee. Fees are typically calculated as a fee rate, expressed in satoshis per byte (sat/byte).

The total fee paid is the fee rate multiplied by the transaction size. This is because the cost to the network is primarily related to the amount of data (block space) the transaction consumes, not the monetary value being transferred.

Larger transactions, which have more inputs or outputs, consume more block space and thus require a higher total fee to be competitive.

How Does a Miner Select Which Transactions to Include in a Block?
How Does the Number of Inputs and Outputs Affect the Size of a Transaction?
How Does the Fee Rate Concept Relate to the Concept of “Cost-per-Unit” in Financial Analysis?
How Does a Miner Decide Which Transactions to Include in a Block?
What Is a ‘Virtual Byte’ (Vbyte) in Bitcoin Transaction Sizing?
Why Is the Fee Calculated Based on Transaction Size (Bytes) Rather than Value?
How Does the Block Size Limit Create Scarcity for Block Space?
What Is the Block Size Limit and How Does It Enforce Scarcity in Block Space?

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