What temperature is 'High' in a 950 watt microwave?
It is impossible to convert Microwaves into Celsius or Fahrenheit.

Temperature(Celsius):


  Temperature is a measure of the average translational kinetic energy of the molecules of a system. Heat is commonly expressed in either of two units: the calorie, an older metric unit, and the British thermal unit (Btu), an English unit commonly used in the United States.


Energy(Watt):


  Power is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent 'energy per unit time'. For example, when a light bulb with a power rating of 100W is turned on for one hour, the energy used is 100 watt hours (W.


Microwaves are essentially radiation bombarding your food and causing the water molecules inside to get excited/vibrate, this in turn causes heat (Think rubbing your hands together).

If you are told to put something in a Microwave oven for 70 seconds, it is just a tried and tested method of getting the food to the correct internal temperature. You can't compare it to a standard oven.