Gwei Converter
Free Gwei Converter. Convert Wei, Gwei, and Ether units instantly with live ETH price and practical gas cost examples for Ethereum transactions.
All Ethereum Unit Conversions
Gas Cost Reference (at ETH $2,419.00)
| Operation | Gas | 1 Gwei | 5 Gwei | 10 Gwei | 20 Gwei | 50 Gwei | 100 Gwei |
|---|---|---|---|---|---|---|---|
| ETH Transfer | 21,000 | $0.0508 | $0.2540 | $0.5080 | $1.02 | $2.54 | $5.08 |
| ERC-20 Transfer | 65,000 | $0.1572 | $0.7862 | $1.57 | $3.14 | $7.86 | $15.72 |
| ERC-20 Approve | 46,000 | $0.1113 | $0.5564 | $1.11 | $2.23 | $5.56 | $11.13 |
| DEX Swap | 200,000 | $0.4838 | $2.42 | $4.84 | $9.68 | $24.19 | $48.38 |
| NFT Mint | 180,000 | $0.4354 | $2.18 | $4.35 | $8.71 | $21.77 | $43.54 |
| Bridge Transfer | 250,000 | $0.6048 | $3.02 | $6.05 | $12.10 | $30.24 | $60.48 |
| Contract Deploy | 1,500,000 | $3.63 | $18.14 | $36.29 | $72.57 | $181.42 | $362.85 |
ETH price is auto-fetched from CoinGecko. Gas costs are estimates based on typical gas limits. Actual costs depend on network congestion and priority fees.
How to use Gwei Converter
The Gwei Converter translates Ethereum gas price units between wei, gwei, and ETH, and converts any denomination to its current USD cost for a typical transaction. Understanding gwei is essential for Ethereum users — when you set a gas price of 20 gwei, you're specifying 20 × 10⁻⁹ ETH per unit of gas consumed.
Use it when MetaMask or your wallet shows a gas price in gwei and you want to understand the actual dollar cost. For EIP-1559 transactions, enter the base fee plus your priority fee (tip) to see the total effective gas price. The calculator also shows the total transaction cost for standard ETH transfers (21,000 gas) and ERC-20 token transfers (≈65,000 gas).
Input guide and assumptions
Enter a gas price in gwei to see the wei and ETH equivalents, plus the USD cost for a 21,000 gas transfer. Alternatively, enter an ETH amount and get the gwei conversion. The current ETH price is loaded automatically and used for all USD calculations.
For a complete gas cost estimate, enter both the gas price (gwei) and the gas limit (units of computation) — total fee = gas price × gas limit. A standard ETH transfer uses exactly 21,000 gas. A Uniswap swap typically uses 100,000–200,000 gas depending on complexity.
How to interpret results correctly
The gwei converter translates between Ethereum's denomination units: ETH, gwei (10^9 gwei = 1 ETH), and wei (10^18 wei = 1 ETH). Gwei is the standard unit for expressing gas prices on Ethereum — a gas price of 25 gwei means each unit of computational work costs 25 billionths of an ETH. Understanding gwei conversions is essential for estimating transaction costs: a simple transfer using 21,000 gas at 25 gwei costs 525,000 gwei = 0.000525 ETH.
Gas price expressed in gwei provides immediate intuition about network congestion and transaction costs without requiring mental math with tiny ETH decimals. Network participants learn to recognize that 1-3 gwei represents low congestion, 5-10 gwei is moderate, and 15+ gwei signals heavy congestion or high demand. Converting these gwei prices to dollar costs at current ETH prices enables real-time cost-benefit analysis for transaction timing.
Common mistakes to avoid
- Assuming gas prices are constant. Gas prices on Ethereum fluctuate 5x-20x within a single day. A transaction estimated at 2 gwei ($0.10) might actually cost 15 gwei ($0.73) if submitted during a network demand spike. Always check current gas before confirming.
- Forgetting that different transaction types consume different gas amounts. A simple ETH transfer uses 21,000 gas, but a complex DeFi interaction can use 500,000+. Converting gwei to dollars is meaningless without multiplying by the actual gas consumed.
Authoritative sources
Frequently asked questions
What is a Gwei converter?
A Gwei converter translates between Wei, Gwei, and ETH. 1 ETH = 1,000,000,000 Gwei = 10^18 Wei. Gas prices are quoted in Gwei because typical fees (5–50 Gwei) are easier to read than 5,000,000,000–50,000,000,000 Wei.
How much is 1 Gwei in ETH?
1 Gwei = 0.000000001 ETH (10^-9 ETH). At ETH = $3,500, 1 Gwei = $0.0000035. A standard 21,000-gas ETH transfer at 20 Gwei costs 21,000 × 20 = 420,000 Gwei = 0.00042 ETH = $1.47.
What is a typical gas price in Gwei?
In 2026 Ethereum mainnet gas averages 8–25 Gwei during normal hours, spiking to 80–200 Gwei during NFT mints or major launches. L2s like Arbitrum/Base typically settle at 0.01–0.10 Gwei equivalent, making transfers cost <$0.05.
Why is gas measured in Gwei not ETH?
Because raw fees are tiny fractions of ETH. Quoting "0.000000020 ETH per gas" is unwieldy; "20 Gwei" is human-readable. Wei (10^-18 ETH) is the base unit but is impractical for users — Gwei sits at the right scale for typical transactions.
How do I avoid overpaying gas?
Check gas trackers (Etherscan Gas Tracker, Blocknative) and submit during low periods (typically Sat–Sun 02:00–08:00 UTC, 30–50% cheaper). Use EIP-1559 with maxPriorityFeePerGas of 1–2 Gwei for non-urgent txs, and never blindly accept wallet defaults during congestion.
What is the difference between gas price and gas limit?
Gas limit is the maximum units a tx can consume (21,000 for ETH transfer, 65,000+ for ERC-20, 200,000+ for swaps). Gas price (Gwei) is the price per unit. Total fee = gas used × gas price. Setting too low a limit causes "out of gas" failures and you still pay for the consumed gas.
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