Gas Limit
The maximum amount of gas you're willing to spend on a blockchain transaction.
Explained Simply
Gas limit sets the upper bound of computational work your transaction can consume. Simple ETH transfers use ~21,000 gas. Complex DeFi interactions might use 200,000-500,000+ gas. Setting the gas limit too low causes your transaction to fail (you still pay for the gas used). Setting it too high wastes no money — unused gas is refunded. Most wallets set gas limits automatically, but understanding them helps when transactions fail.
Example
A token swap on Uniswap might need 150,000 gas. If gas price is 30 gwei, the maximum fee is 150,000 × 30 gwei = 0.0045 ETH (~$13.50).
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This content is for educational purposes only and does not constitute financial, tax, or legal advice. Always consult a qualified professional for advice specific to your situation.