OSRS Fractured Archive Loot Calculator
The Fractured Archive (TFA) drops, turned into your own purple rate from contribution points, team size and deaths - plus the clear time a bigger team needs before it actually beats duo.
The Fractured Archive does not roll a unique for every player. It rolls once for the team, then asks who earned it. That one sentence explains why a five-player group sees more purples while each player sees fewer. The numbers below follow the rules Jagex published on 3 November 2026 and show the two figures that decide your week: your purple chance per raid and your purples per hour.
Raid setup
model v1.0 Enter your run to see the odds.
Team sees a purple
1 in 14
The purple is yours
1 in 28
Your contribution share:
Your target drop
Named item chance already includes your purple rate and the item's share of the purple table. Cumulative runs assume independent raids - going dry never becomes "due".
Expected value at the chest
Default prices are the last-reviewed GE values in the raid model, so the numbers above are a floor you can compare against. The page swaps in live GE mids from the OSRS Wiki API when it loads; value assumes you sell the unique and keeps the standard chest estimate separate.
Team size: does a bigger group pay? Team purple rises by 4% of the 1/14 base per extra player, but your share divides by the same headcount. The last column flips the comparison into time: how fast a team must clear to beat duo for you at the minutes you entered.
| Team | Team points | Team purple | Your share | Your purple | Personal rate | To match duo |
|---|---|---|---|---|---|---|
| 1 | 700 | 7.14% | 100.0% | 7.14% | 1 / 6.5 hrs | ≤ 56.0 min |
| 2 | 700 | 7.14% | 50.0% | 3.57% | 1 / 13 hrs | baseline |
| 3 | 700 | 7.43% | 33.3% | 2.48% | 1 / 19 hrs | ≤ 19.4 min |
| 4 | 700 | 7.71% | 25.0% | 1.93% | 1 / 24 hrs | ≤ 15.1 min |
| 5 | 700 | 8.00% | 20.0% | 1.60% | 1 / 29 hrs | ≤ 12.5 min |
| 6 | 700 | 8.29% | 16.7% | 1.38% | 1 / 34 hrs | ≤ 10.8 min |
| 7 | 700 | 8.57% | 14.3% | 1.22% | 1 / 38 hrs | ≤ 9.6 min |
| 8 | 700 | 8.86% | 12.5% | 1.11% | 1 / 42 hrs | ≤ 8.7 min |
How Fractured Archive loot works
A clean raid is worth 700 contribution points: 100 for each of the first four encounters and 300 for Ocellus. Damage splits each room's points between the team, minion damage counts, and soft caps stop a team farming one spawn for contribution. Ocellus alone is three sevenths of the pool, which is why the final fight decides most personal shares.
At the chest the team rolls once at 1 in 14. Every player beyond two adds 4% of that base chance - not four percentage points. The purple then goes to one player with probability equal to their share of the 700 points. A death removes 10% of your expected share, so the penalty is fixed by team size rather than by how much damage you had already done.
| Team | Team purple chance | Equal share per player | Your purple per raid |
|---|---|---|---|
| 1 player | 7.14% | 100.0% | 7.14% · 1 in 14 |
| 2 players | 7.14% | 50.0% | 3.57% · 1 in 28 |
| 3 players | 7.43% | 33.3% | 2.48% · 1 in 40.4 |
| 5 players | 8.00% | 20.0% | 1.60% · 1 in 62.5 |
| 8 players | 8.86% | 12.5% | 1.11% · 1 in 90.3 |
Deathless, full contribution, equal damage. Real teams rarely split evenly - enter your own contribution above instead of trusting the equal-share column.
Fractured Archive unique split
Once a purple exists, the item is drawn from a fixed 15-part table. These shares are published; the absolute rate that produces the purple is not.
| Item | Weight | Share of purples | One purple in |
|---|---|---|---|
| Rondache | 5/15 | 33.3% | 1 in 3 |
| Zorya's tome | 4/15 | 26.7% | 1 in 3.75 |
| Horn of Bran | 3/15 | 20.0% | 1 in 5 |
| Ascension crossbows | 2/15 | 13.3% | 1 in 7.50 |
| Obligator | 1/15 | 6.7% | 1 in 15 |
The Obligator is the rarest item in the split, not a separate roll: one purple in fifteen is an Obligator, and roughly one raid in fourteen produces a purple for the team.
Why the five-man team is not automatically better
Going from duo to five players raises the team's purple chance from 7.14% to 8.00% - about 12% more purples for the group. Your share falls from 50% to 20%. Your personal chance drops from 3.57% to 1.60%, a 55% cut. To break even, the five-player team must complete raids 2.23 times faster than the duo, including banking and failed attempts.
That is the whole argument in one line: team size buys consistency and recovery, not personal loot. Larger teams are worth it when they turn wipes into clears or cut minutes sharply, and the comparison table above prices exactly that trade at your own clear time.
What this model does not claim
- Published inputs, derived output. The team roll (1 in 14, plus 4% of that base per player beyond two) and the 5/4/3/2/1 split are Jagex's own numbers. Your personal rate is the one derived figure here: team roll x your share of the 700 points, which is why every table states the contribution it assumes.
- Standard chest value is an estimate. The non-unique chest is modelled at about 331K gp from logged chests, before the three rolls and the 1/51 five-times quantity upgrade. It is not a quote.
- Not modelled: the Orion pet (reported 1/750), cabbage outcomes, fragment and folio dupe protection, and the exact standard-table composition. None of them change the purple decision.
- Expect rebalancing. Jagex said light-touch changes were coming. When the numbers move, this page moves to a new model version instead of quietly retuning.
Model v1.0 · rules dated 2026-11-03 · source: Jagex loot rules (3 Nov 2026) + OSRS Wiki chest data. Prices refresh from the OSRS Wiki real-time API; the page is useful before they load.
Fractured Archive loot FAQ
What is the Fractured Archive purple rate?
Jagex's 3 November 2026 rules start the team at 1 in 14 for a purple and add 4% of that base for every player beyond two, so a five-player team sits at 1 in 12.5. The purple is then awarded to one player in proportion to contribution, which is why your personal rate is always lower than the team's.
Is solo better than duo for Fractured Archive loot?
Per completed raid, yes: solo keeps the full 1 in 14 while a duo player with an even split takes 1 in 28. Per hour it depends on clear time. Solo scales encounters to a two-player baseline and is a serious mechanical commitment, so the honest test is whether your solo takes less than twice your duo time.
How much does one death cost in contribution?
Each death removes 10% of your expected share, not 10% of what you actually dealt. In a duo the expected share is 350 of the 700 available points, so a death costs about 35 points; in a five-player team it costs about 14. The penalty applies even if your damage was already below the average.
What are the Fractured Archive unique drop rates?
The split of a purple is published: Rondache 5/15, Zorya's tome 4/15, Horn of Bran 3/15, Ascension crossbows 2/15 and Obligator 1/15. What is not published is a per-player number: your personal rate is the team roll multiplied by your share of the 700 points, so this page labels it as a derivation rather than an official drop rate.
Does the boss route change the loot?
No. Jagex stated that every boss pairing awards the same contribution points, so the route changes how long a raid takes and how risky it is, not the size of the reward roll. Pick the pairing your team clears fastest without dying.
Keep going
The same engine powers the Tombs of Amascut loot calculator, which adds the invocation curve. If you are still choosing a setup, price the upgrade in the DPS calculator first, then check what the drop is worth in live GE prices.