Tools / Codex
Reroll Budget Calculator
How many pulls — and how many source-unit packs — to reach your 6★ target. Runs a 6,000-trial Monte Carlo in your browser. Nothing leaves your device.
Estimated rates from Arknights mainline (0.8% base, soft pity from pull 50, hard pity at 99). NOT Endfield-verified — the official rates may differ.
1 ★
1 to 6 copies of any 6★ from the banner.
Confidence
Economy settings
source / pull
Pack sizes are placeholders — adjust to match Endfield's live shop.
Pulls needed
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Single pulls to hit target at chosen confidence.
Source units
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At your configured cost per pull.
Approximate packs
Rounded up — assumes you buy only one size.
Small
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Medium
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Large (best value)
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How this is computed
- 6,000-trial Monte Carlo client-side simulation per recalc.
- Per-pull 6★ rate uses Arknights mainline curve: 0.8% base, +2% per pull from pull 50, hard guarantee at pull 99 (resets on hit).
- Result shows the pull count at which the chosen fraction of trials had already reached the target. No rate-up assumption — counts any 6★.
For planning only. Real numbers will shift with the official Endfield rates; check back as they're confirmed.