What is gas fee?

Gas fees are the charges required to perform any transaction or execute a smart contract on the blockchain. Read more about it!

In recent years, the world of blockchain technology has witnessed an explosion of interest in Non-Fungible Tokens (NFTs). While NFTs have gained widespread popularity, one crucial aspect that often confuses newcomers is the concept of gas fees. Gas fees play a vital role in the functioning of blockchain networks, including NFTs. In this article, we will delve into the intricacies of gas fees, explaining their significance in the NFT and blockchain ecosystem.

What are Gas Fees?

Despite being a shorter subject, we created an article just for the gas fee to better explain its importance within the blockchain. Gas fees are a critical component of blockchain networks, primarily associated with Ethereum and other similar platforms. In simple terms, gas fees are the charges required to perform any transaction or execute a smart contract on the blockchain. These fees are denominated in the network’s native cryptocurrency, such as Ether (ETH) for Ethereum.

How do Gas Fees Work? To understand gas fees, we need to grasp the concept of “gas.” Gas represents the computational effort required to execute specific operations on the blockchain network. Each operation, such as sending an NFT or executing a smart contract, consumes a certain amount of gas. When a user initiates a transaction on the blockchain, they include a gas limit and a gas price. The gas limit specifies the maximum amount of gas they are willing to consume for that transaction, while the gas price indicates the price they are willing to pay per unit of gas consumed. The total fee for a transaction is determined by multiplying the gas limit by the gas price.

At Kanazawa, we use OpenSea.io as our main marketplace. When buying an NFT, the buyer will be charged a fee in addition to the amount set by the seller. The buyer is responsible for paying the gas fee, unless it’s an auction. Beware of scammers who may ask you to send Ethereum to cover the gas fee. If someone asks for this and claims that you (the seller) don’t have Ethereum in your wallet, it’s likely a scam. To learn how to protect yourself from cybercriminals, read our article on staying safe online.

Why do Gas Fees Exist?

Gas fees serve multiple purposes in the blockchain ecosystem. Firstly, they prevent malicious users from clogging up the network with frivolous or computationally expensive transactions. By requiring a fee for each operation, the network discourages spam and ensures the efficient allocation of resources.

Secondly, gas fees incentivize miners or validators to include transactions in the blockchain. Miners are responsible for verifying and validating transactions, prioritizing those with higher gas fees. This competition ensures that transactions are processed promptly, maintaining the network’s integrity and security.

Factors Affecting Gas Fees

Gas fees can vary significantly based on several factors, including network congestion, gas price fluctuations, and transaction complexity. During periods of high network activity, such as popular NFT drops or decentralized finance (DeFi) events, gas fees tend to surge due to increased demand for transaction processing.

Furthermore, the gas price is determined by market forces, with users competing to secure limited computational resources. Fluctuations in the gas price are influenced by factors such as network demand, the price of the native cryptocurrency, and users’ willingness to pay for faster transactions.

Mitigating Gas Fees

Given the potential volatility and unpredictability of gas fees, users have developed strategies to optimize their costs. Some techniques include:

  1. Gas Optimization: Developers can design smart contracts and NFTs with efficient code to reduce gas consumption.
  2. Gas Price Monitoring: Users can leverage various online tools and platforms to monitor gas prices and select optimal times for their transactions.
  3. Layer 2 Solutions: Layer 2 scaling solutions, like Ethereum’s Optimistic Rollups or sidechains, offer alternatives to reduce congestion and lower gas fees.


Gas fees are an integral aspect of blockchain networks, ensuring transactional security and resource allocation. Understanding gas fees is crucial for participants in the NFT and blockchain space, enabling them to make informed decisions regarding transaction costs and network utilization. By considering the factors affecting gas fees and employing appropriate strategies, users can navigate the evolving blockchain landscape more efficiently and cost-effectively.

After reading this basic guide on NFTs, you have a better understanding of their world. The next step is to learn how your NFT can increase in market value, allowing you to profit from it. We’ll explain how.