Ethereum Gas Fee Calculator
Calculate exact gas fees for ETH transfers, DeFi swaps, NFT mints, and smart contract interactions — live prices updated every 15 seconds with EIP-1559 Base Fee + Priority Fee breakdown.
Gas fees update every 15 seconds. Prices are estimates and may vary based on network conditions.
APIs Used: Etherscan Gas Tracker API for real-time gas prices, CoinGecko API for ETH/USD exchange rate.
APIs Used: Etherscan Gas Tracker API for real-time gas prices, CoinGecko API for ETH/USD exchange rate.
Current Gas Prices Loading...
Slow
~5 min wait
-- gwei
$--
Standard
~2 min wait
-- gwei
$--
Fast
~15 sec wait
-- gwei
$--
Transaction Cost Calculator
ETH Transfer
Standard transferGas Used
21,000
Est. Cost
$--
ERC-20 Transfer
Token transferGas Used
65,000
Est. Cost
$--
Uniswap Swap
Token swapGas Used
150,000
Est. Cost
$--
NFT Transfer
ERC-721 transferGas Used
85,000
Est. Cost
$--
Custom Gas Calculator
Total Gas Cost:
-- ETH
-- ETH
USD Equivalent:
$--
$--
Max Fee:
$--
$--
Understanding Gas Fees
EIP-1559 Structure
- Base Fee: Network-determined minimum fee
- Priority Fee: Tip to miners for faster processing
- Max Fee: Maximum you're willing to pay
Transaction Speed
- Slow: Lower cost, 3-5 minutes
- Standard: Balanced cost, 1-2 minutes
- Fast: Higher cost, 15-30 seconds
What Are Ethereum Gas Fees?
Ethereum gas fees are transaction costs paid to network validators for processing and confirming transactions on the Ethereum blockchain. Every operation on Ethereum—from simple ETH transfers to complex smart contract interactions—requires computational resources, measured in "gas units."
How Gas Works
- Gas Limit: Maximum gas units for a transaction
- Gas Price: Amount paid per gas unit (in gwei)
- Total Fee: Gas Limit × Gas Price
- Network congestion affects pricing
EIP-1559 Upgrade
- Base Fee: Burned by network
- Priority Fee: Tip to validators
- More predictable pricing
- Better user experience
Gas Optimization Tips
Time Your Transactions
Monitor network congestion and execute transactions during low-activity periods for better rates.
Use Layer 2 Solutions
Consider Polygon, Arbitrum, or Optimism for lower-cost transactions with Ethereum security.
Batch Transactions
Combine multiple operations into single transactions when possible to reduce total gas costs.
Frequently Asked Questions
Gas fees increase during high network demand. Popular applications, NFT drops, and market volatility create congestion, driving up prices as users compete for block space. Our gas calculator helps you find the optimal fee for your transaction priority.
Slow (3-5 min): Lower fee, suitable for non-urgent transactions.
Standard (1-2 min): Balanced cost and speed for typical use.
Fast (15-30 sec): Higher fee for priority processing, ideal for time-sensitive transactions.
Standard (1-2 min): Balanced cost and speed for typical use.
Fast (15-30 sec): Higher fee for priority processing, ideal for time-sensitive transactions.
Our calculator uses real-time data from Etherscan's gas oracle, updated every 15 seconds. While highly accurate for current conditions, actual fees may vary based on network congestion changes and transaction complexity. Always set appropriate gas limits to avoid failed transactions.
Transactions with insufficient gas fees may remain pending for extended periods or eventually fail. While failed transactions still consume some gas, it's better to use our recommended fees to ensure timely processing and avoid wasted costs.
No, gas fees are not refunded for failed transactions. The network still processes the computation up to the failure point. This is why it's crucial to use our gas calculator to estimate appropriate fees and gas limits before submitting transactions.
Gas limit is the maximum number of computational units your transaction can consume. A simple ETH transfer always uses exactly 21,000 gas units, while a Uniswap swap may use 150,000–300,000 units depending on the path complexity.
Gas price is how much you pay per unit of gas, measured in gwei (1 gwei = 0.000000001 ETH). Your total fee = Gas Limit × Gas Price.
Setting gas limit too low causes your transaction to fail (but you still pay for gas consumed). Setting gas price too low means your transaction may stay pending or take a very long time to confirm.
Gas price is how much you pay per unit of gas, measured in gwei (1 gwei = 0.000000001 ETH). Your total fee = Gas Limit × Gas Price.
Setting gas limit too low causes your transaction to fail (but you still pay for gas consumed). Setting gas price too low means your transaction may stay pending or take a very long time to confirm.
In 2026, a good gas price for Ethereum mainnet is 8–20 gwei for standard transactions. Below 10 gwei is excellent — typically seen on weekends and late-night UTC hours. 20–50 gwei is moderate and acceptable for urgent transactions. Above 50 gwei is expensive — consider waiting for lower congestion or using Layer 2 networks like Arbitrum or Base where fees are fractions of a cent.
At typical gas prices (15–25 gwei):
- ETH Transfer: ~$0.50–$2.00
- ERC-20 Token Transfer (USDT, USDC): ~$1.50–$5.00
- DEX Swap (Uniswap): ~$3–$15
- NFT Mint/Transfer: ~$2–$10
- Complex Smart Contract: ~$10–$50+
Gas Fee Comparison by Transaction Type
| Transaction Type | Typical Gas Limit | Complexity | Use Case |
|---|---|---|---|
| ETH Transfer | 21,000 | Simple | Sending ETH between wallets |
| ERC-20 Transfer | 45,000-65,000 | Medium | Sending tokens (USDC, USDT, etc.) |
| DEX Swap | 150,000-300,000 | Complex | Trading on Uniswap, SushiSwap |
| NFT Transfer | 80,000-120,000 | Medium | Moving NFTs between wallets |
| Smart Contract | 200,000+ | Variable | DeFi protocols, custom contracts |
Best Practices for Gas Fee Management
Do's
- Monitor gas prices before transactions
- Use our calculator for accurate estimates
- Set appropriate gas limits
- Consider Layer 2 for frequent transactions
- Time transactions during low congestion
- Use standard speed for most transactions
Don'ts
- Don't set extremely low gas prices
- Don't panic during high congestion
- Don't ignore failed transaction warnings
- Don't overpay for simple transfers
- Don't rush complex DeFi interactions
- Don't forget to account for gas in wallet balance
Layer 2 Gas Fee Comparison — Live Prices Loading...
Should you transact on Ethereum mainnet or an L2? Compare real-time gas costs across major networks to find the cheapest option for your transaction.
| Network | Gas Price | ETH Transfer | ERC-20 Transfer | DeFi Swap |
|---|---|---|---|---|
| Ethereum | -- gwei | $-- | $-- | $-- |
| Arbitrum | -- gwei | $-- | $-- | $-- |
| Base | -- gwei | $-- | $-- | $-- |
| Optimism | -- gwei | $-- | $-- | $-- |
| Polygon | -- gwei | $-- | $-- | $-- |
USDT Transfer Fee by Network — Which Is Cheapest?
Sending USDT (Tether) is the most common crypto transaction globally. The network you choose dramatically affects how much you pay in fees. Here's the real-time comparison:
ERC-20
Ethereum
$--
Arbitrum
L2 Rollup
$--
Polygon
PoS Chain
$--
TRC-20
TRON
~$1.00
avg. estimate
Tip: For USDT transfers under $10,000, Layer 2 networks like Arbitrum and Polygon typically cost less than $0.10 — over 95% cheaper than Ethereum mainnet.
Best Time to Send ETH — When Are Gas Fees Lowest?
Gas fees follow predictable patterns based on global trading activity. Knowing when fees are lowest can save you 50–80% on transaction costs.
Weekly Gas Fee Pattern (Historical Average)
| Day / Time (UTC) | 00:00–06:00 | 06:00–12:00 | 12:00–18:00 | 18:00–00:00 |
|---|---|---|---|---|
| Monday | Medium | High | Very High | High |
| Tuesday | Medium | High | Very High | High |
| Wednesday | Medium | High | High | Medium |
| Thursday | Low | Medium | High | Medium |
| Friday | Low | Medium | Medium | Low |
| Saturday | Low ✓ | Low ✓ | Low ✓ | Medium |
| Sunday | Low ✓ | Low ✓ | Medium | Medium |
Cheapest Times
- Saturday & Sunday, 00:00–12:00 UTC — consistently lowest fees
- Weekday late nights (00:00–06:00 UTC) — US markets closed, low activity
- Friday evenings UTC — trading desks winding down for the weekend
Most Expensive Times
- Monday–Tuesday, 12:00–18:00 UTC — US + EU markets overlap
- During NFT drops or token launches — gas bidding wars
- Market crash/pump events — mass liquidations spike fees