Free Ethereum Gas Fee Estimator

The Ethereum Gas Fee Estimator is a free online tool that check current ethereum network gas prices using public rpc. estimates fees for common operations (eth transfer, erc-20 swap, nft mint) in usd.. It runs entirely in your browser with no installation or sign-up needed.

Gas cost = gas units × gas price (gwei) × ETH price. ETH price comes from CoinGecko.

Yes, completely free.

Absolutely. The Ethereum Gas Fee Estimator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Ethereum Gas Fee Estimator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Ethereum Gas Fee Estimator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Ethereum Gas Fee Estimator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Since the EIP-1559 upgrade, every Ethereum transaction fee has two parts. The base fee is set automatically by the protocol, rises and falls with network demand, and is burned — permanently removed from supply rather than paid to anyone. The priority fee, or tip, is what you add on top to incentivize a validator to include your transaction in the next block. Your max fee is simply the two combined, and the real cost is gas used × (base fee + priority fee). This split is why fees spike during busy mints or volatile markets: the base fee climbs with demand while users bid higher tips to jump the queue. In this estimator you enter both values separately, so you can see exactly how each one moves your total cost up or down before you sign.

Gas units measure computational work, and each type of action has a fairly predictable cost. A plain ETH transfer is fixed at 21,000 gas, the cheapest possible operation. Moving an ERC-20 token like USDC runs about 65,000 gas because it updates a contract's balance ledger. A typical Uniswap or DEX swap uses around 150,000 gas, an ERC-721 NFT mint about 200,000, and deploying a smart contract roughly 500,000. The gas units stay roughly constant regardless of price; what changes is the per-unit Gwei rate set by demand. That is why a swap can cost several times more than a simple send even at the same gas price. This estimator prices all five of these common operations side by side so you can compare them at the current network rate.

The three units stack in fixed powers of ten: 1 ETH equals 1,000,000,000 Gwei, and 1 Gwei equals 1,000,000,000 Wei, so 1 ETH is 1,000,000,000,000,000,000 Wei. To go from Gwei to ETH you divide by one billion, and to reach Wei you multiply by one billion. For example, 20 Gwei is 0.00000002 ETH and 20,000,000,000 Wei. Converting to dollars adds one more step: multiply the ETH amount by the current ETH/USD price, so at $3,000 per ETH that same 20 Gwei is worth about $0.00006. These tiny numbers are easy to fumble by hand, which is why the Gwei Converter tab does all four at once — enter a Gwei value and it returns the matching Wei, ETH, and USD instantly.

Ethereum block space is sold by auction, so the price reflects how many people want to transact at that moment. The EIP-1559 base fee adjusts every block: when blocks fill past their target, it rises; when demand cools, it falls. Layered on top, users set their own priority tips, bidding higher to get included faster during congestion. The result is that fees can swing several dollars on the very same action between a busy block and a quiet one — popular NFT mints, major DeFi events, and volatile market hours all push prices up. There is no fixed schedule, but late-night and weekend periods are often calmer. Checking the live rate before you act is the only reliable way to know, which is why this tool lets you fetch the current network gas price with one click and compare slow, standard, and fast tiers.

The three tiers represent how aggressively you bid for inclusion, applied as a multiplier on top of your combined gas price. Slow uses the base rate and typically waits about 5 to 10 minutes, since you are paying roughly the minimum to get into a block eventually. Standard applies about 1.2× and usually confirms in 1 to 3 minutes, a balanced choice for everyday transfers and swaps. Fast applies about 1.5× and generally lands in under 30 seconds, worth it when you are racing a mint or a moving price. Wait times are estimates, not guarantees — actual confirmation depends on live network demand. The trade-off is always speed versus cost, and during quiet periods even the slow tier confirms quickly. This estimator shows all three side by side so you can decide whether paying more is worth it right now.