To convert -34º C to Fahrenheit, plug the temperature in Celsius in the formula and solve. F = 9/5C + 32 F = 9/5(-34) + 32 To solve this you must first multiply. 9/5 • -34 = -61.2 F = -61.2 + 32 Now add. -61.2 + 32 = -29.2 The answer is -34º C equals -29.2º F.