Gas Fee Calculator
Calculate transaction costs before you send
Transaction Type
Higher = more complex transaction
Set by network, gets burned
Your tip to validators
Speed Presets
For USD conversion
Fee Breakdown
Cost Comparison
When You Need This
Before Token Swaps
You're about to swap $500 USDC for ETH on Uniswap. Gas is showing 80 gwei. Is it worth $60 in fees? Check here first. Maybe wait an hour when it drops to 20 gwei and save $45.
NFT Minting
New NFT drop in 10 minutes. Everyone's rushing. You see 200 gwei gas prices. That's $140 to mint. Calculate if it's profitable. If floor price is $100, you're losing money before you start.
Moving Small Amounts
Got $50 worth of tokens stuck on Ethereum? Gas fee is $15. That's 30% gone. Use this to see exact costs. Maybe batch multiple transfers or wait for Sunday morning when fees drop.
Timing Your Transactions
Not urgent? Calculate costs at different times. 2am EST usually has 10-15 gwei. Peak hours (9am-5pm EST) hit 50+ gwei. Save 70% by being patient. Check every few hours.
DeFi Strategy Planning
Want to claim staking rewards weekly? If gas is $30 each time, that's $120/month. Calculate if monthly claims make more sense. Sometimes holding for bigger batches is smarter financially.
Smart Contract Testing
Deploying a contract? Estimate costs first. Complex contracts can burn $500+ in gas. Test on testnet, calculate mainnet costs here. Budget properly before you deploy and avoid surprises.
Common Questions
What is Ethereum gas fee?
Gas is the fee you pay to get your transaction processed on Ethereum. Think of it like a service charge. The busier the network, the higher the fee. Measured in gwei (1 gwei = 0.000000001 ETH).
How do I calculate gas fees?
After EIP-1559: Total Fee = (Base Fee + Priority Fee) × Gas Used. Base fee is set by network demand. Priority fee is your tip to miners. Gas used depends on transaction complexity - simple ETH send uses 21,000 gas, token swaps use 150,000+.
What's the difference between base fee and priority fee?
Base fee gets burned (destroyed). It's determined by network congestion and adjusts every block. Priority fee (tip) goes to validators. You set this - higher tip means faster confirmation when network is busy.
Why are gas fees so high?
Network congestion. When lots of people want to transact at once, fees spike. NFT mints, token launches, and market volatility cause surges. Early morning US time (late night Asia) usually has lower fees.
How much gas do different transactions use?
ETH transfer: 21,000 gas. ERC-20 token send: 65,000. Uniswap swap: 150,000-200,000. NFT mint: 100,000-300,000. Complex DeFi interactions: 300,000-500,000+. More complex = more gas.
What's a good gas price right now?
Depends on urgency. Under 20 gwei = cheap (wait 5-10 mins). 20-50 gwei = normal (1-3 mins). Over 50 gwei = expensive but fast (under 1 min). Check real-time prices before transacting.
Can I cancel a pending transaction?
Yes, before it confirms. Send a 0 ETH transaction to yourself using the same nonce but higher gas. Or use your wallet's built-in cancel function. Once confirmed, it's permanent.
How to save on gas fees?
Transact during low-traffic hours (weekends, early morning UTC). Use Layer 2 networks like Arbitrum or Optimism. Batch multiple actions together. Set lower priority fees if not urgent. Avoid trading during NFT drops or major events.
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