Polygon Gas Estimator – Calculate Transaction Fees Before You Send

A Polygon gas estimator predicts the total fee for a transaction before you submit it on-chain. By combining the estimated gas units for your transaction type with the current Gwei price from the Polygon Scan gas tracker, you get an accurate cost in both POL and USD.

Common transaction types and their typical gas usage on Polygon: Standard POL transfer (21,000 gas), ERC-20 approval (46,000 gas), Uniswap V3 single-hop swap (130,000–180,000 gas), NFT mint from a standard ERC-721 contract (80,000–150,000 gas), OpenSea NFT purchase (200,000–300,000 gas).

To use the estimator, multiply the gas units for your action by the current Gwei price for your chosen priority tier. Divide by 10⁹ to convert to POL. Then multiply by the current POL/USD price to get the dollar cost. For example, at 150 Gwei and a 150,000 gas limit: 150,000 × 150 ÷ 10⁹ = 0.0000225 POL—under a penny at most current POL prices.

Smart contract developers can call eth_estimateGas via the Polygon RPC endpoint to programmatically determine the exact gas required for any transaction before broadcasting it. This API is compatible with standard Ethereum tooling and is the most accurate method for gas estimation.