it's a 1:1 when you convert a stable to USD - some exchanges might take a small fee like 0.01% or so ... On Coinbase it's a 1:1 https://www.coinbase.com/en-de/c

it's a 1:1 when you convert a stable to USD - some exchanges might take a small fee like 0.01% or so ... On Coinbase it's a 1:1 https://www.coinbase.com/en-de/converter/usdc/usd https://www.coinbase.com/en-de/converter/usdc/usd