Gas Fee Estimator

Blocknative Gas Estimator helps you manage transaction fees efficiently, maintaining speed without overspending.

Blocknative Gas Estimator is a browser extension that provides users with accurate, real-time gas fee estimations for Ethereum, Polygon, Optimism, Arbitrum, Sei and other supported blockchains. By analyzing pending transactions in the mempool when available or using statistical modeling, it helps users set optimal gas fees, ensuring timely transaction confirmations without overpaying.

The extension is available for Chrome, Brave and Firefox browsers.

1

Download the extension

• Chrome and Brave

  Visit the Chrome Web Store and click "Add to Chrome" or "Add to Brave" to install the extension.

• Firefox

  Navigate to the Firefox Add-ons page and select "Add to Firefox" to install.

2

Create an account or Login

• Creating an Account

  To access all features for free like configurable alerts, sign up for a free Blocknative account.

• Logging In

  If you already have an account, enter your credentials.

3

Accessing the estimations

After installation, click on the Blocknative icon in your browser's toolbar to open the gas estimator interface. The interface displays current gas prices at various confidence intervals and on various networks, helping you choose the optimal fee for your transaction.

• 99% Confidence Level: Ensures the highest inclusion guarantee, though it may result in some overpayment.

• 70% Confidence Level: Offers a balance between likely inclusion and reduced overpayment.

Features

• Real-Time Gas Fee Estimates

  Provides gas price predictions, allowing users to set appropriate fees for their transactions.

• Support for Multiple Networks

  Offers gas estimations for Ethereum, Polygon, Sei, Arbitrum, Optimism, Base, and more, with additional networks being added regularly.

• Visual Gas Price Tracking

  Includes charts displaying recent gas prices by block, broken down between base fee and priority fee, along with a 7-day gas price heatmap.

Data Handling and Permission - The extension does not collect or use your data beyond its core functionality. It requires minimal permissions, such as , to operate effectively.

Support and Feedback

• Contact Information

  For support or inquiries, email the Blocknative team at [e-mail].

• Community Engagement

  Join the Blocknative community on Discord to connect with other users and developers.

Frequently Asked Questions (FAQs)

1. How often do gas fee estimates update, and do I need an account to use the extension? The Blocknative Gas Estimator updates every for all users. A free account is required to access all estimations.

2. What are Ethereum gas fees, and why do I need to pay them? Ethereum gas represents the computational effort to process transactions on the network. Every transaction requires a gas fee, which is paid to miners. Fees vary based on transaction size and network congestion. Read our articles for a comprehensive overview on Gas.

3. How are gas fees calculated on Ethereum, and what are the key terms? Under EIP-1559, fees consist of three parts:

   • Base Fee: Set by the network and burned during transactions.

   • Max Priority Fee: Optional tip to incentivize miners.

   • Max Fee: Maximum amount a user is willing to pay per gas unit. For more on EIP-1559 calculations, view our blog.

4. What is gwei, and why are gas fees shown in this unit? Gwei is 1/1,000,000,000 of 1 ETH, making it easier to represent small amounts. All Ethereum fees are displayed in gwei for simplicity.

5. What happens if a transaction fails? If a transaction fails, gas is not refunded because validators still expended resources. However, any excess gas will be returned to the sender.