Here's how to convert 105 degrees Celsius (°C) to Fahrenheit (°F):

Formula:

°F = (°C x 9/5) + 32

Calculation:

1. Multiply Celsius by 9/5: 105 °C x 9/5 = 189

2. Add 32: 189 + 32 = 221

Therefore, 105°C is equal to 221°F.