How to swap ETH for another token in MetaMask?

Accessing the Swap Interface

1. Open the MetaMask browser extension and ensure it is unlocked.

2. Click the Swap tab located at the top of the interface—this is distinct from the “Send” or “Activity” tabs.

3. Confirm that the correct network is selected in the top-right corner; swapping only functions on networks where both tokens are deployed and supported.

4. If the desired token does not appear in the dropdown, use the search bar to enter its name or contract address manually.

Selecting Tokens and Amounts

1. In the “From” field, verify ETH is selected; if not, click the token icon and choose ETH from the list.

2. In the “To” field, select the target token—for example, USDC, DAI, or a newly deployed ERC-20 asset.

3. Enter the amount of ETH you wish to swap; the interface automatically calculates the estimated output based on live liquidity and routing paths.

4. Review the slippage tolerance setting—default is typically 0.5% but may be adjusted upward for volatile or low-liquidity tokens.

Reviewing Transaction Details

1. Scroll down to view the breakdown: expected output, price impact, network fee (gas), and routing information (e.g., Uniswap v3, SushiSwap).

2. Check the “Allowance” status—if this is your first time swapping into the target token, MetaMask will request permission to spend your ETH via an approval transaction.

3. Observe the “Rate” field showing real-time exchange ratio; rapid fluctuations may indicate thin order book depth or high volatility.

4. Verify the destination chain matches your active network—swapping across chains requires bridge usage, not the Swap tab.

Confirming and Broadcasting

1. Click Swap to initiate the process; a modal appears with final parameters and gas estimate.

2. Confirm the approval transaction first if prompted—this is a separate, low-cost transaction enabling future swaps without re-approval.

3. After approval succeeds, the second transaction—the actual swap—is submitted with dynamically calculated gas and nonce.

4. Monitor progress in the “Activity” tab; successful swaps display green checkmarks and updated token balances within seconds after block confirmation.

Frequently Asked Questions

Q: Why does MetaMask show “Insufficient balance” even when I hold ETH?A: This occurs when ETH is held on a different network than the one currently selected—verify the top-right network indicator matches where your ETH resides.

Q: Can I swap ETH for a token not listed in MetaMask’s token catalog?A: Yes—paste the token’s verified contract address into the “To” field; MetaMask will fetch symbol, decimals, and logo if the token adheres to ERC-20 standards and is indexed by its token API.

Q: What happens if the swap fails after approval?A: The approval remains active until manually revoked; subsequent swaps require no new approval unless the spender address or allowance amount changes.

Q: Is slippage protection mandatory?A: It is enforced by default; disabling slippage control exposes users to extreme price movement risk, especially on illiquid pairs or during flash crash events.