How was the currency exchange rate changed on yesterday? USDT price dropped by 2.48% between min. and max. value. Min. Tether value was $0.993. Max. USDT price was $1.018. The average value Tether price for convert (or exchange rate) during the day was $1.005. We see that the value at the end of the day has fallen. Let's see how it turns out today.