Gas & Transaction Fees

What Is Gas and Why Do You Pay Fees?

Every time you make a transaction on a blockchain — sending crypto, swapping tokens, minting an NFT — the network charges a fee. On Ethereum and many other blockchains, this fee is called 'gas.' Gas is the unit that measures the computational work required to process your transaction. Think of it like fuel for a car: more complex operations (like interacting with a smart contract) require more gas than simple operations (like sending ETH from one address to another).

Fees exist for two important reasons. First, they compensate validators (or miners) who process transactions and maintain the network — this is their incentive to keep the blockchain running. Second, fees prevent spam — without fees, an attacker could flood the network with millions of useless transactions, slowing it to a crawl. The fee market ensures that network resources are allocated to users who value them enough to pay.

Why Fees Vary So Much

Gas prices are not fixed — they fluctuate based on network demand. When many people want to make transactions at the same time (during an NFT drop, a market crash, or a popular token launch), fees spike dramatically because users compete with each other to get their transactions processed first. During quiet periods (weekends, off-peak hours in US and European time zones), fees can be extremely low. This is why the same swap that costs $2 on a Sunday afternoon might cost $50 during a popular token launch.

Gas on Different Blockchains

• Ethereum: Highest fees among major chains, typically $1-$50+ depending on congestion. Fees paid in ETH.
• Solana: Extremely low fees, typically $0.001-$0.01. Fees paid in SOL.
• Bitcoin: Variable fees based on block space demand, typically $1-$20. Fees paid in BTC.
• Layer 2s (Arbitrum, Optimism, Base): Ethereum security at a fraction of the cost, typically $0.01-$0.50. Fees paid in ETH.
• BNB Chain: Low fees, typically $0.05-$0.30. Fees paid in BNB.