What is the lowest fee to send USDT?

I'm curious about the lowest fee for sending USDT. I understand that cryptocurrency transactions often involve fees, and I'm looking for the most cost-effective way to transfer my USDT. Could you please provide me with information on the lowest possible fee for sending USDT, and perhaps some insight into how these fees are calculated? I'm also interested in knowing if there are any factors that could affect the fee, such as the amount being transferred or the speed of the transaction. Thank you for your time and assistance.