Gas measures work, not value
Gas units estimate the computational work a transaction can consume. The amount of ETH being transferred does not by itself determine gas usage; contract logic and calldata matter.
Gas price is commonly displayed in Gwei. One Gwei is one billion Wei, and one ETH contains one billion Gwei.
The fee has changing inputs
On Ethereum, the base fee responds to block demand and the priority fee can reward faster inclusion. A wallet estimates both and may add a limit buffer. Unused gas is not charged as if it were consumed.
Layer 2 costs can combine execution with data-publication costs. A simple gas-units multiplication may therefore omit part of a rollup transaction’s final fee.
Use presets as a starting point
A native transfer is usually simpler than a token transfer or swap. Presets are useful for scenario planning, but a wallet simulation against the actual contract is more specific.
Put the method into practice
Open the related calculator with your own inputs. Review its formula, source labels, and limitations before comparing the result with a wallet, exchange, contract interface, or provider.
Use Gas Cost Converter →