# Estimating deployment costs with Forge

**Published by:** [0xbanky](https://paragraph.com/@banky/)
**Published on:** 2023-09-18
**URL:** https://paragraph.com/@banky/estimating-deployment-costs-with-forge

## Content

Simply include the -i / --interactive option to enter interactive mode. For example $ forge script script/Deploy.s.sol --rpc-url <rpc_url> --broadcast --verify -vvvv --sender <wallet_address> -i 1 While running the script, you will now be prompted with a message similar to this ========================== Chain 5 Estimated gas price: 3.00000002 gwei Estimated total gas used for script: 3524127 Estimated amount required: 0.01057238107048254 ETH ========================== ### Finding wallets for all the necessary addresses... Enter private key: As you can see, forge pauses before completing the deployment to ask for your private key. You can now check the estimated amount of ETH required for the transaction. This is a life saver especially when deploying large contracts during periods of high on-chain activity where you may want to avoid accidentally spending a lot of money on transaction fees before you have a chance to agree to the estimate. If you found this helpful, support my work by collecting an NFT of this piece!

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