Ethereum Unit Conversion Cheat Sheet - Wei Gwei ETH

Ethereum Unit Conversions

Units

1 wei = 1
1 gwei = 1,000,000,000 wei (10^9)
1 ETH = 1,000,000,000 gwei (10^18)
1 ETH = 1,000,000,000,000,000,000 wei

Solidity

uint256 amount = 1 ether; // 1e18 wei
msg.value // always in wei
ethers.formatEther(bal); // wei to ETH
ethers.parseEther("1.0"); // ETH to wei

Gas Costs

Base tx: 21,000 gas
ERC-20 transfer: ~65,000 gas
NFT mint: ~150,000 gas
Uniswap swap: ~200,000 gas

All cheat sheets: https://rentry.co/85pm7d8y