Updated Reserved Mana Calculator

A while ago I read about people wanting an upgrade for Vislike's Reduced Mana Calculator. Since Vislike hasn't updated his calculator in months or even played the game lately, I took liberty to edit his calculator and add a couple of features. All credit for old features goes to Vislike.

Updated Reserved Mana Calculator

Changelog:

Reduced Mana now goes up to level 30
Added support for Blood Magic support gem
Added support for Empower support gem
Added support for Clarity aura

Notes:

All information is from PoE Wiki, as well as tested by me extensively. If you find any bugs, let me know and I'll fix them.
Blood Magic support gem has non-linear gem progression and Wiki info only goes up to level 21, so the calculator only supports Blood Magic up to that level. If you know values for the gem at level 22 or above, post a pic of them and I'll add them to the calculator.

Nice and simple I like it.

Thanks!

One thing I noticed is that a lv20 reduced mana says it has a multiplier of .71 but when running 1 60 and 2 40 auras with no other reduction and 500 man you have 10 left. If it was .71 then you should be left with only 3 mana instead of 10. The value of .7 works though. I noticed that in game too. I was wondering if I'm missing something.

"

lvtwentyswd wrote:

One thing I noticed is that a lv20 reduced mana says it has a multiplier of .71 but when running 1 60 and 2 40 auras with no other reduction and 500 man you have 10 left. If it was .71 then you should be left with only 3 mana instead of 10. The value of .7 works though. I noticed that in game too. I was wondering if I'm missing something.

The formula for mana reservation has two roundings. You'll never see decimal percentages ingame, and they're not used behind the scenes either.

Formula is, taken straight from the calculator source code and translated to English more or less:

Final Reservation = Rounded Up(Rounded Down(Aura Cost * Gem Reductions) * Skill Tree & Item Reductions)

Or in case of your simple example:

Final Reservation = Rounded Down(Aura Cost * Gem Reductions)

Still doesn't make sense. 140% of 500 is 700 and .71*700 is 497. No rounding.

Even if done separately, .4*500*.71 = 142 exactly.
.6*500*.71 = 213. 213+2*142 = 497 as well.

The values also don't change if you go from a level 20 to 21 reduced mana gem.


Only way I can figure is that it is doing is round down to the hundredth place(reduced from gem multi * %gem cost) for each gem separately. Then adding those up and multiplying by total mana.

That would be .71*.4 = .284 ->.28
.71*.6 = 42.6 -> 42. 28+28+42 = 98. 98% of 500 is 490.

"

lvtwentyswd wrote:

Only way I can figure is that it is doing is round down to the hundredth place(reduced from gem multi * %gem cost) for each gem separately. Then adding those up and multiplying by total mana.

That would be .71*.4 = .284 ->.28
.71*.6 = 42.6 -> 42. 28+28+42 = 98. 98% of 500 is 490.

This is correct. Since .284 is in percentage format 28.4% and decimals don't exist in these percentages, they're rounded out. It might sound complicated and maybe even counter intuitive from math point of view, but remember that most players only look at ingame tooltips, and those tooltips need to be exact.