## Thickness Factor Worksheet

Started by norcoscia, September 15, 2015, 03:43:56 PM

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#### gcpizza

Quote from: NemsaTheBrick on December 29, 2023, 04:40:03 AM
After thinking about it I think the formula was originally made for imperial units and that is why its not working well with metrics. The good thing is that by dividing final metric result by 4.5 I can get almost the same results as with imperial unit chart

More precisely,  4.39418487274474549

You are correct in your conclusion. Thickness Factor (TF) as defined by this forum is always oz/in^2. A Metric Thickness Factor (MTF) as you are calculating is g/cm^2.

The attached chart may help you easily see the relationship between oz/in^2 and g/cm^2.

#### NemsaTheBrick

Thanks a lot for going extra mile to provide one!

#### gcpizza

#22
Quote from: NemsaTheBrick on December 29, 2023, 08:15:48 AM
Thanks a lot for going extra mile to provide one!

There's another common Thickness Factor used on the forum that is a hybrid of the metric and US systems - g/in^2. Hans uses it in his Detroit Style thread.

#### Howitzer21

#23
Converting the Legends by pizza style was fun...

For those using non-Freedom units, I've created Metric (g/cm^2) as well as Hybrid (g/in^2). Also added cm measurements for pie size on all versions.

Reference: Imperial 0.100 = Metric 0.439 = Hybrid 2.834.
-Zack

#### Anton1

#24
Quote from: NemsaTheBrick on December 28, 2023, 04:13:54 PM
Not sure where but I am stuck with TF math and hopefully someone can help me understand it.

I am used to a metric system but its not exactly working for me so I wonder.

If I have a 350g (12.5oz) dough ball and would like my pizza with ~0.085 TF. According to the charts done here it should be 35cm (14") pizza. If I use metric system, I get the following: 350g/(3.14 x r17.5cm x r17.5cm) = ~0.36 and if I use 350g/(3.14 x ⌀35 x ⌀35) = ~0.09

Math works perfectly if I use radius with imperial units but only works if I use diameter with metric units. Where is the catch or I am missing something?

Difference if calculating area when using radius: A = pi * r * r , or, when using diameter: A = pi * (d * d)/4.

Chart TF converts square inches ( in^2) to ounces(oz)  Conversion factor is (oz/in^2).

Convert in^2 to cm^2:  0.155 in^2 = 1 cm^2.
Conversion factor is (0.155 in^2/1cm^2) or (1cm^2/0.155 in^2)

Convert ounces to grams: 1oz = 28.375 gram.
Conversion factor is (1oz/28.375g) or (28.375g/1oz)

For your example: r=17.5cm pie, Chart TF= 0.085 use conversion factors as shown:

(17.5cm*17.5cm*3.14)*(0.085oz/1 in^2)*(28.375g/1oz)*(0.155 in^2/1 cm^2)=359.68g dough weight.

Shown: (area of 17.5cm radius circle) times (TF/sq.in. conversion) times (gram/oz conversion) times (sq.in. to sq.cm) conversion.

FYI a conversion factor is oriented such that the units (cm, in, oz, g) cancel as required.

Anton1

Or use the updated Metric TF chart.

My Title? Call me anything except, "The Late".

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