EldenRingSpellComparer

A web app to compare AR, Damage, and FP Efficiency for offensive spells.

How to Use:

Enter in your stats (str/dex/int/fai/arc)
Select your desired casting tool(s)
Select the regular/somber upgrade level for the casting tool(s) you want to use.
If you use an off-hand casting tool to boost damage via a particular spell school, click the desired school(s) from the "Extra Spell Schools" list.
- Whatever casting tool(s) you've selected will also confer any school bonuses they offer (so you can double up if necessary).
Enter in whatever defense values you think your target may have.
- For PvP, you can generally look at your own build or similar builds at your level. You can use this build planner for reference.
- For PvE, you can consult this sheet for defense/negation values for all enemies/bosses (the same defense value is used for all damage types).

Once you've entered in the data you want, the list below should populate (defaulting to sorting by Net Damage/FP).

You can also see some useful information like whether the spell can be cast on horseback and the stat requirements for the spell.

This only shows offensive spells that directly deal damage or add AR to a weapon. Only spells which you meet the requirements for are currently listed (the tool defaults to 10/10/80/50/18 str/dex/int/fai/arc in order to show everything).
Regarding the "Hits" for some spells like Meteorite, weapon buffs, etc. I've generally tried to guesstimate either a favorable cast or a reasonable amount of hits, but I'd want a more data-driven approach to figuring out that number - or add something to let you configure that yourself.
For spells that can be channeled (Comet Azur, Crystal Barrage, etc.) the tool is more or less displaying a single tap of the button and doesn't factor in the additional/repeating cost.

Armor Optimizer (Find the best armor based on desired weight, poise, and negation/resistances.)
Casting Tool Comparator (Enter in your desired stats and compare how each Staff and Seal performs relative to each other.)
Rune Level Calculator (Find out the level of the player who died based on how many runes you received.)

The scaling information for this is based on /u/TarnishedSpreadsheet's Weapon Calculator tool. I also used some data-mined information they provided.
This uses data-mined spell AR values curated by Cryptid Tracker.
Thanks to Tical for helping with testing and initial data collection.
Damage calculation based on information posted by TalentedJuli. Dark Souls 3 and Elden Ring use roughly the same system.
Please be sure to check the Contributors List to see who've been submitting changes on GitHub.