Wallets & network fees
Learn what a crypto wallet controls, how Ethereum gas fees are calculated, and what to check before sending tokens across a blockchain network.
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A practical crypto guide to wallets, network fees, and the mechanics behind the headlines.
Open calculatorGas usedGas priceFee in ETH
0.00042
ETH in the worked example
General crypto
Change one assumption
Full calculatorExplore four illustrative scenarios. These are calculations, not provider quotes or product rankings.
5 gwei
Illustrative cost model
21,000 gas units at an illustrative 5 gwei gas price.
20 gwei
Illustrative cost model
21,000 gas units at an illustrative 20 gwei gas price.
50 gwei
Illustrative cost model
21,000 gas units at an illustrative 50 gwei gas price.
100 gwei
Illustrative cost model
21,000 gas units at an illustrative 100 gwei gas price.
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Translate gas units and gwei into an estimated network fee. Enter your own ETH price; these are example inputs.
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Wallets & network fees
A wallet manages signing keys. A network fee pays for transaction execution. Neither tells you whether an asset is a good investment.
The guide works through the definitions, the arithmetic, and the practical checks. Read the assumptions alongside the example, then use your own inputs in the calculator to see what changes.
Read the full guideWhat we cover
A practical crypto guide to wallets, network fees, and the mechanics behind the headlines.
Start with the guide for context, use the calculator to work through a scenario, and check the comparison framework before evaluating a product.
- Wallets
- Separate the interface, the account, and the keys before choosing how to hold assets.
- Network fees
- Learn why the token you send and the asset used to pay gas can be different.
- Transactions
- Follow an action from a wallet prompt to an onchain receipt.
- Reading news
- Check primary announcements, dates, network names, and what actually changed.
Evidence before a verdict
A useful comparison makes its assumptions visible.
Our starting library focuses on explainers and transparent calculations. Example amounts illustrate a method. They are not current market prices, verified provider fees, or measured product performance. Where a detail depends on a service, follow the linked primary documentation and confirm the terms that apply to your account and region.
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