Gas Fee Estimator

A gas fee estimator projects the cost of a blockchain transaction in the fee paid to validators for processing it. The fee depends on the network, the type of transaction, and the current gas price. Seven EVM-compatible networks and six transaction types are covered, with optional EIP-1559 fee modeling for networks that use it.

Each network pays gas in its own native token: ETH for Ethereum, MATIC for Polygon, BNB for BNB Smart Chain, AVAX for Avalanche, and so on. Transaction type sets a typical gas limit: a basic transfer uses 21,000 gas units, an ERC-20 token transfer about 65,000, a token swap around 150,000, an NFT mint about 200,000, and a contract deployment roughly 500,000; a custom gas limit can replace any of these. Gas price is set in Gwei, where one Gwei equals 0.000000001 of the native token, and comes from a block explorer or gas tracker for a current value. Priority speed scales that gas price by a multiplier: 0.8x for Low, 1x for Standard, and 1.5x for Fast, with higher multipliers raising the chance of faster confirmation.

Total fee equals gas limit multiplied by the gas price after the priority multiplier is applied, reported in the native token and converted to USD using a native token price. The EIP-1559 fee model splits that gas price into a base fee, which the network burns, and a max priority fee, which goes to the validator; both are set directly when EIP-1559 mode is enabled. Fractions such as 1/2, mixed numbers such as 3 1/4, and decimals all work in the numeric fields, and commas or dollar signs typed into a price field are stripped automatically.

A basic transfer, 21,000 gas units, at a gas price of 30 Gwei and Standard priority (1x), costs 630,000 Gwei (21,000 x 30). At 0.000000001 ETH per Gwei, that is 0.00063 ETH (630,000 x 0.000000001). With ETH priced at $3,000, the fee converts to $1.89 (0.00063 x 3,000).

Gas fee estimation helps with budgeting transactions, comparing networks, and timing operations for lower costs.

• DeFi Trading: Whether a token swap on Ethereum at 45 Gwei is worth executing often comes down to whether the fee on 150,000 gas units still leaves the trade profitable at current ETH prices.
• NFT Minting: Minting on Ethereum costs significantly more than the same operation on a Layer 2 network: a 200,000 gas limit at 30 Gwei on Ethereum far exceeds the cost of minting on Polygon or Base at around 0.1 Gwei.
• Multi-chain Deployment: Deploying a smart contract across multiple chains means budgeting roughly 500,000 gas units per network, so total deployment cost across Ethereum, Arbitrum, Optimism, and Base sets how much to allocate before starting.
• Wallet Budgeting: Dividing an available native token balance by the estimated per-transaction cost at current gas prices gives the number of basic transfers a wallet can afford.
• EIP-1559 Analysis: Base fee spikes during network congestion raise total transaction costs sharply: a base fee of 100 Gwei with a 3 Gwei priority fee models peak conditions, against a calmer 15 Gwei base fee in normal periods.
• Cross-chain Bridge Planning: Bridging assets from Ethereum to Arbitrum involves a transaction on each chain, and the combined cost of both sides determines whether the fee savings on the destination chain justify the bridging expense.
• Gas Optimization: Custom gas limits for optimized contracts often undercut standard estimates: a well-optimized ERC-20 transfer might use 45,000 gas instead of the standard 65,000, saving roughly 30 percent on fees.
• Batch Transaction Planning: The total cost of sending ERC-20 tokens to 50 recipients, found by multiplying the per-transfer fee estimate by the transaction count, sets a baseline to compare against a batch transfer contract using a single higher gas limit.