Online Tool Store
Gas Fee Estimator
Gas Fee Estimator does the arithmetic on values you supply — it never connects to a network or a wallet, which is the point.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Crypto & Blockchain
Gas Fee Estimator (Manual)
Frontend preview — no upload or external service.
Fee Estimate
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How the Gas Fee Estimator works
- Enter the gas limit for the operation — a simple transfer differs by an order of magnitude from a contract interaction.
- Enter the current base fee and your chosen priority fee, taken from a block explorer or your wallet.
- Read the fee in native units and fiat. Base fees move continuously, so the figure is only as current as the numbers you typed.
The method
Under the current fee model, the total paid is gas used multiplied by the sum of base fee and priority fee.
fee = gas limit x (base fee + priority fee)
The base fee is burned and adjusts with network congestion; the priority fee is what actually competes for inclusion.
FAQ
Why does it ask me for the base fee?
Because it does not connect to any network. You supply the current values from a block explorer or wallet, which keeps the tool offline and means nothing about your activity is transmitted.
What gas limit should I use?
A plain transfer is 21,000. Contract interactions vary from tens of thousands to millions depending on what they do. Your wallet estimates it before signing, and that estimate is the number to use.
Why do I pay less than the limit sometimes?
The limit is a ceiling; you pay for gas actually used. Unused gas is not charged, which is why setting a slightly generous limit is safe while setting it too low wastes the fee on a failed transaction.
How we compare
| Feature | Online Tool Store | A spreadsheet | An advisor consultation |
|---|---|---|---|
| Works offline | ✓ | ✗ | ✗ |
| No wallet connection | ✓ | ✗ | ✗ |
| Fiat equivalent | ✓ | ✓ | ✓ |
| Nothing transmitted | ✓ | ✗ | ✗ |
Gas Fee Estimator does the arithmetic on values you supply — it never connects to a network or a wallet, which is the point.