How much does it cost to convert WETH to ETH?

Could you please clarify for me, how much does it actually cost to convert Wrapped Ether (WETH) back to its original form, Ether (ETH)? I'm trying to understand the associated fees and expenses involved in this process. Is there a fixed rate or does it vary depending on market conditions? Also, are there any additional costs or considerations that I should be aware of before proceeding with the conversion? Your insights would be greatly appreciated.