World level/Cost/Etc are all based on the setting, please go to setting tab and config it.
You need to input artifacts on artifact input page, then use them in damage calculation page.
Some characters have skills related(e.g. Xiao/Hutao),Please set related skill level first(level will be saved automatically), then select skill to calculate damage.
This calculator only assumes the “default“ condition, some special conditions like double geo reduce resistance only deal damage to enemy/Ganyu c1 reduce resistance only hit enemy by first hit, they are not the “default“ condition, you need to set separately by yourself.
If the damage result is not match the real damage in game, please eliminate special conditions first(like double pyro), then double check the calculation detail carefully, make sure it is a calculator bug then submit issue.
Please join discord to submit issue or make suggestions.