Drive Disc Scorer
Paste in what the disc rolled and get the two numbers that matter: roll value (% of perfect) and crit value. Graded in plain language before you waste tuner currency.
How it works
Each substat is scored against its maximum single-roll value on an S-rank disc; the average of the four shares is your roll value. Crit value is the standard community convention.
RV% = 100 × Σ(valueᵢ ÷ maxRollᵢ) ÷ 4 CV = 2 × Crit Rate% + Crit DMG%
Default roll caps: ATK% 3 · Flat ATK 19 · HP% 3 · Flat HP 112 · DEF% 4.8 · Flat DEF 15 · Crit Rate 2.4 · Crit DMG 4.8 · PEN 9 · PEN Ratio 2.4% · AP 9 — community-reported, [VERIFY] per patch on the methodology page.
FAQ
What is a good roll value (RV) for a drive disc?
Community convention: 85%+ RV is a keeper you build the set around, 70–85% is a solid placeholder, 55–70% is fine until something better drops, and under 55% is fodder once you have alternatives. These bands are convention, not official — the RV math itself is exact.
What is crit value (CV)?
CV = 2 × Crit Rate% + Crit DMG%. Double-weighting crit rate reflects how much scarcer it is on discs. Crit-focused players often use CV alone; RV matters more for non-crit or anomaly builds.
Why does my disc show fewer than 4 substats?
Leave unused rows at "—". The scorer only counts filled rows and divides by 4 (the S-rank substat count), so a partially-leveled disc grades fairly against its final potential.