Need a mathematician to help with calories!

Joanna_77
Joanna_77 Posts: 14 Member
in Food and Nutrition
I don't know why this is so difficult.

I cooked 1 cup of steel cut oats. 1/4 cup dry (40 grams) is 150 calories. 1 cup cooked weighed 930 grams. How many grams cooked is 100 calories?

"Allergies are real. If I have a strawberry my throat shuts up faster than a girl in math class." - Kenneth (30 Rock)

Replies

  • kikkipoo
    kikkipoo Posts: 292 Member
    This would have been better had you measured out dry. Now because neither the cups or the grams are proportional, it's not really more than a best guess. Some of that weight is the water or milk that it absorbed. I usually rough estimate 1/4 cup dry will double in size/weight when wet, making approximately 1/2 cup wet equal 150 calories. If you want only 100, you need 2/3 of that amount or 1/3 cup of cooked oats.
  • Acg67
    Acg67 Posts: 12,142 Member
    25 2/3g of dry made in water will be 100 cals
  • gregpack
    gregpack Posts: 426 Member
    You want to eat .2/3rds (. represented in decmal form as.66) of the 150 calories, so multiple current cooked weight *.66.

    930*.66= 613.8 grams
  • sexygenius
    sexygenius Posts: 1,078 Member
    153.45 grams of cooked oatmeal is 100 calories

    930= 1 cup cooked

    930/4=232.5 grams

    232.5 grams= 150 calories

    232.5*0.66=153.45

    (this is for if you measured one cup of dry oats and then cooked it)
  • mfp_1
    mfp_1 Posts: 516 Member
    KellySJ said:
    > 40 grams oats is 150 calories
    > cooked weight is 930 grams
    You don't say what you added but let's assume it was water.

    Water has no calories. Any amount of water with 40 g oats is still 150 calories.

    Thus the cooked 930 grams is still 150 calories.
    Each gram contains 150/930 calories.
    So 100 grams will be (100*150)/930 = 16 calories.
  • mfp_1
    mfp_1 Posts: 516 Member
    And 620 grams of that mixture cooked is 100 calories.


    As others have said, it's best to weigh your serving without the water. If 40 grams is 150 calories, then 100 calories is (40 *100)/150 = 27 grams.
  • therealangd
    therealangd Posts: 1,861 Member
    I agree with the 620 grams is 100 calories.

    930 grams / 150 calories = 6.2 calories per gram

    6.2 calories / gram x 100 = 620 calories per 100 grams
  • H2Ologist
    H2Ologist Posts: 122 Member
    I don't know why this is so difficult.

    I cooked 1 cup of steel cut oats. 1/4 cup dry (40 grams) is 150 calories. 1 cup cooked weighed 930 grams. How many grams cooked is 100 calories?

    Wait you guys are getting your proportions wrong with the 2/3 thing,

    If 1/4 cup is 150 cal. then 1 cup is 600 calories.

    If you want 100 calories than you need 1/6 NOT 2/3 of the total cooked.

    SO in grams that would be 1/6 of 930 grams OR 155 grams.
  • PrincessGlitterTush
    PrincessGlitterTush Posts: 388
    TOO much SMART for me right here.. heehee
  • mfp_1
    mfp_1 Posts: 516 Member
    It's much simpler if the whole thing is done in grams.
  • therealangd
    therealangd Posts: 1,861 Member
    I don't know why this is so difficult.

    I cooked 1 cup of steel cut oats. 1/4 cup dry (40 grams) is 150 calories. 1 cup cooked weighed 930 grams. How many grams cooked is 100 calories?

    Wait you guys are getting your proportions wrong with the 2/3 thing,

    If 1/4 cup is 150 cal. then 1 cup is 600 calories.

    If you want 100 calories than you need 1/6 NOT 2/3 of the total cooked.

    SO in grams that would be 1/6 of 930 grams OR 155 grams.

    The 1 cup the OP is talking about is cooked. 1/4 dry makes 1 cup cooked. So 1/4 dry has the same calories as 1 Cup cooked. It just has 0 calorie water added for volume. So 150 calories is 1 cup cooked is 930 grams

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