Understanding Gas Calculation in Ethereum

What You Need to Know

Tiziano Tridico
3 min readMar 29, 2023
Photo by Michael Förtsch on Unsplash

TL;DR:

Gas is a unit of measurement for the computational resources required to execute transactions and smart contracts on the Ethereum network. The gas price is denominated in gwei and determined by market supply and demand. The gas limit is set by the transaction sender to prevent malicious or faulty contracts from consuming unlimited resources. The idea was that the total cost of a transaction was the product of the gas price and gas limit. Understanding gas calculation is essential for making informed decisions about the cost and efficiency of Ethereum transactions.

Gas is a crucial element of the Ethereum network, serving as a unit of measurement for the computational resources required to perform transactions and execute smart contracts on the blockchain. In this article, we will explore how gas is calculated in Ethereum and its importance for the network’s functionality.

Gas is a measure of the computational resources required to execute a transaction or smart contract on the Ethereum network. The more complex the task, the more gas is required to execute it. Gas is priced in ether, the native cryptocurrency of the Ethereum network, and is paid by the transaction sender to the validator (previously to the miner) who processes the transaction.

The price of gas is denominated in a subunit of ether called “gwei,” which stands for gigawei. One gwei is equal to one billionth of an ether. The gas price is determined by the market supply and demand, with validators being free to choose which transactions they process based on the gas price offered.

1 gwei = 0.000000001 ether

(10^-9 ether)

The basic idea is that the total cost of a transaction is the product of the gas price and the gas limit. The gas limit is the maximum amount of gas that a transaction can consume, and it is set by the transaction sender. If a transaction exceeds the gas limit, it will fail, and the sender will still be charged for the gas used up until the failure point.

The gas limit is an essential parameter as it ensures that a malicious or faulty contract cannot consume an unlimited amount of resources on the network. If the gas limit were not in place, the network would be vulnerable to a type of attack known as a “denial-of-service” attack, where an attacker could consume all of the network’s computational resources by submitting an infinite loop or a very time-consuming operation.

The gas limit is also critical for determining the transaction fee. As mentioned earlier, the idea is that the total cost of a transaction is the product of the gas price and the gas limit. If the gas limit is set too high, the transaction fee will be unnecessarily high, and the sender will pay more than necessary. On the other hand, if the gas limit is set too low, the transaction will fail, and the sender will still be charged for the gas used up until the failure point.

Conclusions

Gas is an essential element of the Ethereum network, serving as a unit of measurement for the computational resources required to execute transactions and smart contracts. The gas price is determined by market supply and demand, with validators being free to choose which transactions they process based on the gas price offered. The gas limit is set by the transaction sender and ensures that a malicious or faulty contract cannot consume an unlimited amount of resources on the network. By understanding how gas is calculated in Ethereum, users can make informed decisions about the cost and efficiency of their transactions.

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The writer of this article is an AI language model trained by OpenAI called “chatGPT”.

About me

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Tiziano Tridico

Computer Engineer | Web Developer | Blockchain Blogger | YouTuber | Crypto Investor | co-founder at koinsquare.com | co-founder at MetalSwap.finance