Half a croissant, on a plate, with a sign in front of it saying '50c'
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Time/watt calculator

Make it easy to see how long to cook a meal in any microwave
  [vote for,

At the moment I do not have access to one of the many watt to time conversion charts on the internet.

I have an 800 W microwave. The frozen dinner I am preparing says to cook it at 1100 Watts for 6 1/2 minutes.

I punch the 1100 watts for 6 1/2 minutes buttons on the built-in microwave calculator to calculate the additional time it will take to heat the food in a lesser 800 W microwave.

The microwave automatically sets the microwave for the new time as acquired through the calculator.

Edit 2020 3 21: I should have mentioned "Because there are so many variables when it comes to micro-cooking frozen foods, there is not a specific formula or direct ratio for calculating conversion times."[1]

No Algebra required at school [2]

People are bad at math [3]

Sunstone, Mar 15 2020

[1] Maybe the proper conversion can only be done by the manufacturer of the microwave? https://www.theeagl...4-e31a9377dfe0.html
[Sunstone, Mar 21 2020]

[2] No algebra required at school to teach you to learn how to think https://duckduckgo....uired&t=ffsb&ia=web
[Sunstone, Mar 21 2020]

[3] Many if not most are bad at math https://duckduckgo....+math&t=ffsb&ia=web
[Sunstone, Mar 21 2020]


       6.5 minutes = 390 seconds.   

       1100/800 = 11/8 = 1.375   

       390 * 1.375 = 536.5 = 8.93 minutes   

       No online calculator needed...
8th of 7, Mar 15 2020

       Perhaps the microwave oven control panel should be calibrated in whatt-ours instead of seconds? Would that be in joules I suppose?
pocmloc, Mar 15 2020

       It would be better to calculate a set of conversion factors - in binary, for universal applicability - for each power range; these could then be chiselled onto a small polished granite stele, placed alongside the microwave oven for easy reference.
8th of 7, Mar 15 2020

       We guess RFC 1149, "IP over Avian Carriers"
8th of 7, Mar 15 2020

       But that does exactly fulfill the criteria for half-bakedness ...
8th of 7, Mar 21 2020

       It would have to be a Babbage engine, powered by a Newcomen engine driven by steam from the microwave oven, then. ..
8th of 7, Mar 22 2020

       I think you should need to increase the time beyond what the formula says when scaling for a less-powerful microwave oven, and vice versa, because heat loss from the food will take away a larger portion of the input energy at a lower power, due to the heating taking place over a longer time interval. By how much will depend on the food and its shape.
notexactly, Mar 22 2020


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