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• FIRST POST
• bouicca21
• 13th Jan 19, 3:12 PM
• 4,237Posts
• 6,776Thanks
bouicca21
Not sure where this belongs but plenty of cooks on this board so here goes ...

Does anyone know how to calculate/adjust microwave cooking times?

For example I have a packet of fresh peas that says it needs to be microwaved for 2 minutes. I only want to use half the packet. Is the cooking time the same (as it would be if I steamed or boiled them) or do I reduce it and if so for how much?
Page 1
• VfM4meplse
• 13th Jan 19, 4:03 PM
• 28,214 Posts
• 60,137 Thanks
VfM4meplse
Some of it is guesswork, which can be assisted by knowing a) the wattage of your microwave, and b) the wattage referred to in the cooking instructions. Theoretically you could calculate the total energy required to cook the item and then divide by the wattage of your machine to get the number of seconds you would need to cook it for. A bit of division and multiplication are all that is required.

This is a scientist's, rather than a cook's answer!
Value-for-money-for-me-puhleeze!

"No man is worth, crawling on the earth"- adapted from Bob Crewe and Bob Gaudio

Hope is not a strategy ...A child is for life, not just 18 years....Don't get me started on the NHS, because you won't win...I love chaz-ing!
• PasturesNew
• 13th Jan 19, 4:10 PM
• 66,002 Posts
• 387,650 Thanks
PasturesNew
Every microwave oven is a different strength. Every brand's bag of peas is different (size, variety). Every bowl is a different shape/size.

2 minutes for half a bag wouldn't be "wrong" in any case. Why not try a couple after 1½ minutes... or just do it for 2 and think "that won't hurt".

It's peas..... can't go wrong really.
• frugalmacdugal
• 13th Jan 19, 4:20 PM
• 6,515 Posts
• 5,585 Thanks
frugalmacdugal
Hi,

put the stuff in for a minute, remove, stir and try a pea, if not happy, zap them for another 30 seconds, repeat as necessary.
Y'all take care now.
• bouicca21
• 13th Jan 19, 5:13 PM
• 4,237 Posts
• 6,776 Thanks
bouicca21
Try then taste is just what've been doing - just wondered if there was a 'proper' way of calculating cooking time.
• VfM4meplse
• 13th Jan 19, 5:24 PM
• 28,214 Posts
• 60,137 Thanks
VfM4meplse
Try then taste is just what've been doing - just wondered if there was a 'proper' way of calculating cooking time.
Originally posted by bouicca21
It is this:

Theoretically you could calculate the total energy required to cook the item and then divide by the wattage of your machine to get the number of seconds you would need to cook it for.
Originally posted by VfM4meplse
Worked example as follows:

Instructions: cook for one minute at 1000W. This is equivalent to a total dose of radiation of 60000Ws.

Your microwave only cooks at a darstadly low 600W. This means that you would need to cook the same item for (60000Ws/600w=100s) 1 minute 40 seconds.
Value-for-money-for-me-puhleeze!

"No man is worth, crawling on the earth"- adapted from Bob Crewe and Bob Gaudio

Hope is not a strategy ...A child is for life, not just 18 years....Don't get me started on the NHS, because you won't win...I love chaz-ing!
• Linda32
• By Linda32 13th Jan 19, 7:37 PM
• 4,273 Posts
• 9,373 Thanks
Linda32
I cook frozen peas and sweetcorn in the microwave. Put an amount for two in flat bowl. A little cold water, 2 minutes zap, stir with finger, then another 2 minutes and they are done.