Why do you call it USDT price calculator?
You are showing cryptocurrencies prices in USD.
USDT, BUSD, USDC or any other stable coins are all the same, they are all just = 1 USD.
I would call it USD price calculator.. or crytpocurrencies price calculator.
You raise a good point, I selected Tether (USDT) because it was the first crypto that is backed by the US dollar.