web "Beer Tools" IBU determination

[DancingBear]

Hi,

What is the is the formula for the

Thanks

[DancingBear]

Sorry, first post cut off

What formula does web Beer Tools use to determine IBUs?

[jeff]

Sorry, first post cut off

What formula does web Beer Tools use to determine IBUs?

GOLD members have a choice of 7, trial members use my formula.

[DancingBear]

I am a gold member.

I have access to all web version types.

What is "Your" formula please.

[jeff]

I am a gold member.

I have access to all web version types.

What is "Your" formula please.

It goes something like this:

U = Utilization
B = Boil Minutes
SG = Boil Gravity

U = 8.02e-9 * (B * SG ^ -4.0523) ^ 4 - 1.91599e-6 * (B * SG ^ -4.0523) ^ 3 + 1.021645e-4 * (B * SG ^ -4.0523) ^ 2 + 4.03607504e-3 * (B * SG ^ -4.0523)

[jeff]

Forgot to add that the formula is for this range:

0 <= B <= 112.868

[jeff]

One more thing. Multiply U by 1.14 if using pellet hops.

[JimInNJ]

How does this compare to the formulas in Beer Tools Pro?

I just downloaded Beer Tools Pro and it is showing 48 IBUs for a recipe that was 38 IBUs online.

- Jim

[jeff]

How does this compare to the formulas in Beer Tools Pro?

I just downloaded Beer Tools Pro and it is showing 48 IBUs for a recipe that was 38 IBUs online.

- Jim

Choose Session->Utilization to open the utilization algorithm editor. You can select several methods of calculating utilization using this utility. The BeerTools.com formula is listed as 'Fowler' (me). Choose this formula and see what effect it has on the IBU calculation. The recipe on the site may use a combination of formulas if the recipe was posted by a gold member. Look under the 'Individual Hops', to see which formula(s) the author selected.