Which networks are supported?

Ethereum, plus BNB Chain, Polygon, and Arbitrum via public RPC eth_gasPrice, shown as Low, Avg, and High gwei bands.

Why do gas numbers differ from my wallet?

Wallets may use priority fees (EIP-1559), private RPCs, or percentiles. Treat this tracker as a fast cross-chain snapshot, then simulate in your wallet before you sign.

How fresh is the data?

Endpoints revalidate about every 60 seconds. The chart stores recent Ethereum average samples while the server instance is warm.

How to read the multi-chain gas tracker

Check Ethereum, BNB Chain, Polygon, and Arbitrum gas (Low/Avg/High), understand oracles vs wallets, and decide when to wait out a fee spike.

Open the tool

Gas can turn a cheap mint or bridge into an expensive mistake. The tracker gives a fast cross-chain snapshot so you can wait, switch networks, or proceed with eyes open.

Launch Gas Tracker →

Purpose

Gas can turn a cheap mint or bridge into an expensive mistake. The tracker gives a fast cross-chain snapshot so you can wait, switch networks, or proceed with eyes open.

When to use it

Before a mint, bridge, deploy, or large L1 settlement
When Ethereum gwei looks elevated and you want L2 comparison
To convert oracle gwei into a mental ETH cost with the unit converter
When teaching someone why “gas is high” today

How to use it

Open Gas Tracker. Load the tool and scan Low, Avg, and High for each supported network.
Check the Ethereum sample chart. Use recent ETH average samples to see whether fees are spiking or cooling.
Compare L2 alternatives. If L1 is expensive, compare BNB, Polygon, and Arbitrum bands for the same action when the app supports those networks.
Simulate in your wallet. Always run a wallet estimate before signing; oracles can differ from priority-fee markets.

Benefits

One screen for ETH plus major L2/sidechain snapshots
Optional Etherscan key improves Ethereum oracle fidelity
About 60-second revalidation with public fallbacks
Works without an account

Pitfalls to avoid

Wallets may use EIP-1559 tips and private RPCs that disagree with the tracker
Public RPC eth_gasPrice bands are approximations
Chart samples are best-effort while the server instance is warm
L2 “cheap” still moves with demand during airdrop rushes

What Low, Avg, and High mean here

Ethereum prefers Etherscan gasoracle when an API key is configured; otherwise Blockscout stats fill in. Other chains use public RPC eth_gasPrice converted wei→gwei with simple bands around the average. Treat bands as a triage tool, not a precise maxFeePerGas recommendation.

If Low and High are far apart, the network is contested. Non-urgent bridges often save more money by waiting than by paying the top of the band.

What to do when Ethereum gas spikes

NFT mints, memecoin launches, and busy settlement windows push average gwei up. Check whether your action can move to an L2 the destination app supports. Use the unit converter to translate gwei into an ETH cost for a known gas limit before you approve.

CryptonicTools never asks you to connect a wallet for this view. That keeps the tracker safe for quick checks on shared devices, with the tradeoff that you must still simulate in the wallet that will sign.

Benefits of a free cross-chain glance

Opening four explorers wastes time when fees are moving. A single tracker reduces that friction and links into fee-related calculators on the same site. Data is informational; always confirm on your wallet’s estimate screen.