Eternal Calculus is a 5-Star Light Cone from The Erudition Path in Honkai: Star Rail. Check out this guide for Eternal Calculus's best characters, stats, ascension materials, and how to get it!

Eternal Calculus Stats and Ability

Eternal Calculus Effects and Overview

Eternal Calculus
Rarity	★★★★★
Path	The Erudition
Ability	Boundless Thought Increases the wearer's ATK by 8%/9%/10%11%/12%. After using an attack, for each enemy target hit, additionally increases ATK by 4%/5%/6%/7%/8%. This effect can stack up to 5 times and last until the next attack. If there are 3 or more enemy targets hit, this unit's SPD increases by 8%/10%/12%14%/16%, lasting for 1 turn(s).
Rating	The Erudition

Rating is based on Superimposition 1.

Light Cone Tier List

Eternal Calculus Stats

Eternal Calculus Superimpose Levels

How to Superimpose Eternal Calculus

Superimposing Eternal Calculus requires the Superimposer (Custom Made), which can be bought from Herta's Shop for 2 Herta Bonds, to upgrade its ability.

Superimposer (Custom Made) Item Guide

Eternal Calculus Best Characters

All Recommended Characters

Recommended Characters
Himeko	Argenti	Qingque
Serval	Herta	Jing Yuan
Jade

Eternal Calculus is a good light cone for Erudition characters since it provides a lot of ATK, especially when facing waves of enemies. Most Erudition characters can make use of this Light Cone, especially in Pure Fiction.

Is Eternal Calculus Worth It?

Good F2P Light Cone for Pure Fiction

Eternal Calculus is a good F2P DPS Light Cone since it provides a lot of ATK which boosts the damage of the wearer. This is even more effective against multiple enemies since you'll be able to stack the ATK buff much more quickly.

It also provides a SPD boost if the wearer hits three or more targets. This Light Cone shines in situations where there are waves of multiple enemies, like Pure Fiction.

However, this Light Cone falls short when there are two or fewer enemies since you won't be able to stack the ATK buff quickly before the next attack and there will be no SPD boost.

Eternal Calculus Ascension Materials

Total Ascension Materials

Ascension Material	Total
Extinguished Core	20
Rough Sketch	4
Dynamic Outlining	12
Glimmering Core	20
Exquisite Colored Draft	15
Squirming Core	14
Credit	385000

Materials Per Ascension Level

Lvl.	Light Cone Ascension Materials
20 ➔ 30	Extinguished Core x8 Credit x5000
30 ➔ 40	Rough Sketch x4 Extinguished Core x12 Credit x10000
40 ➔ 50	Dynamic Outlining x4 Glimmering Core x8 Credit x20000
50 ➔ 60	Dynamic Outlining x8 Glimmering Core x12 Credit x50000
60 ➔ 70	Exquisite Colored Draft x5 Squirming Core x6 Credit x100000
70 ➔ 80	Exquisite Colored Draft x10 Squirming Core x8 Credit x200000

How to Get Eternal Calculus

Purchase From Herta's Store

You can purchase Eternal Calculus for 8 Herta Bonds from Herta's Store in the Simulated Universe.

Simulated Universe Guide

Eternal Calculus Release Date

Released on June 18, 2024

Version 2.3 Phase 1 Release Date
Release Date	June 18, 2024

Eternal Calculus was released in the first half of Honkai Star Rail's Version 2.3 along with the character Firefly.

Version 2.3 Release Date and Banners Guide

Honkai: Star Rail Related Guides

All Light Cones

The Erudition Light Cones

The Erudition Light Cones
An Instant Before A Gaze	Before Dawn	Eternal Calculus
Night on the Milky Way	Ninjutsu Inscription - Dazzling Evilbreaker	Yet Hope Is Priceless
After the Charmony Fall	Geniuses' Repose	Make the World Clamor
The Birth of the Self	The Day The Cosmos Fell	The Seriousness of Breakfast
Today Is Another Peaceful Day	Data Bank	Passkey
Sagacity