Chest (Barrows)

ClosedOpened
Chest
Released	9 May 2005 (Update)
Members	Yes
Quest	No
Location	Barrows crypt
League region	Morytania✓
Options	Open
Examine	A large stone chest.
Map
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Advanced data
Object ID	20723

This is the chest located at the centre of the tunnels beneath the crypts of the Barrows brothers.

Looting the chest

Upon opening the chest, the Barrows brother whose crypt the player entered will appear and start attacking the player, if he did not already appear while travelling through the tunnels. It is not required to kill the Barrows brother in order to loot the chest. However, the chance of getting Barrows equipment from the chest increases as more brothers are killed, and players will not be able to receive equipment belonging to brothers they did not kill. Furthermore, it is required that you kill at least one enemy of any kind in order to be eligible for any possible loot from the chest.

If the player's inventory is full upon looting the chest, excess items will be dropped to the ground.

During the His Faithful Servants miniquest, players will also receive a strange icon.

Rewards

Drop rates estimated based on 128,000 samples from the Drop Rate Project, unless otherwise cited.

Note that the loot chances below are accurate for a Barrows run with all 6 brothers slain and with full potential (1012 points). To accurately calculate your specific situation, please make use of the Barrows calculator.

Pre-roll

Ahrim's

Item	Quantity	Rarity	Price	High Alch
Ahrim's hood	1	7 × 1/2,448	398,127	7,800
Ahrim's robetop	1	7 × 1/2,448	3,910,743	30,000
Ahrim's robeskirt	1	7 × 1/2,448	2,941,813	28,200
Ahrim's staff	1	7 × 1/2,448	245,762	51,000

Dharok's

Item	Quantity	Rarity	Price	High Alch
Dharok's helm	1	7 × 1/2,448	367,096	61,800
Dharok's platebody	1	7 × 1/2,448	827,167	168,000
Dharok's platelegs	1	7 × 1/2,448	1,018,755	165,000
Dharok's greataxe	1	7 × 1/2,448	2,142,442	124,800

Guthan's

Item	Quantity	Rarity	Price	High Alch
Guthan's helm	1	7 × 1/2,448	248,020	61,800
Guthan's platebody	1	7 × 1/2,448	306,416	168,000
Guthan's chainskirt	1	7 × 1/2,448	256,867	165,000
Guthan's warspear	1	7 × 1/2,448	245,845	60,000

Karil's

Item	Quantity	Rarity	Price	High Alch
Karil's coif	1	7 × 1/2,448	54,984	7,800
Karil's leathertop	1	7 × 1/2,448	1,468,532	30,000
Karil's leatherskirt	1	7 × 1/2,448	856,231	28,200
Karil's crossbow	1	7 × 1/2,448	103,163	96,000

Torag's

Item	Quantity	Rarity	Price	High Alch
Torag's helm	1	7 × 1/2,448	136,294	61,800
Torag's platebody	1	7 × 1/2,448	225,131	168,000
Torag's platelegs	1	7 × 1/2,448	295,722	165,000
Torag's hammers	1	7 × 1/2,448	97,039	96,000

Verac's

Item	Quantity	Rarity	Price	High Alch
Verac's helm	1	7 × 1/2,448	110,699	61,800
Verac's brassard	1	7 × 1/2,448	209,923	168,000
Verac's plateskirt	1	7 × 1/2,448	243,394	165,000
Verac's flail	1	7 × 1/2,448	101,738	96,000

Main table

Players who completed the hard Morytania Diary will receive 50% more runes. The base amount without the diary completed is listed below.

	Item	Quantity	Rarity	Price	High Alch
	Coins	2–774	7 × 379/1,012^{[d 1]}	2–774	2–774
	Mind rune	253–336	7 × 125/1,012^{[d 2]}	759–1,008	253–336
	Chaos rune	112–139	7 × 125/1,012^{[d 3]}	11,424–14,178	6,048–7,506
	Death rune	70–83	7 × 125/1,012^{[d 4]}	11,200–13,280	7,560–8,964
	Blood rune	37–43	7 × 125/1,012^{[d 5]}	7,918–9,202	8,880–10,320
Bolt rack.png: Chest (Barrows) drops Bolt rack with rarity 7 × 125/1,012 in quantity 35-40	Bolt rack	35–40	7 × 125/1,012^{[d 6]}	2,310–2,640	1,050–1,200
	Loop half of key	1	7 × 3/1,012^{[d 7]}	11,919	60
	Tooth half of key	1	7 × 3/1,012^{[d 7]}	11,925	60
	Dragon med helm	1	7 × 1/1,012^{[d 8]}	59,006	60,000

^ Requires 1 reward potential to roll.
^ Requires 381 reward potential to roll.
^ Requires 506 reward potential to roll.
^ Requires 631 reward potential to roll.
^ Requires 756 reward potential to roll.
^ Requires 881 reward potential to roll.
^ ^7.0 ^7.1 Requires 1,006 reward potential to roll.
^ Requires 1,012 reward potential to roll.

Tertiary

	Item	Quantity	Rarity	Price	High Alch
	Clue scroll (elite)	1	1/200–1/29^{[d 2]}^{[d 1]}	Not sold	12

^ 1/200 chance for each roll at the drop table; scales up to 1/29 with all six brothers slain.^[1]
^ The elite clue scroll drop rate increases to 1/190–1/27.57 with the completion of the elite combat achievements.

Reward mechanics

Chance of a Barrows equipment piece, per roll
Brothers killed	Chance
Brothers killed	Frac	%
1	1/392	0.255%
2	1/334	0.299%
3	1/276	0.362%
4	1/218	0.458%
5	1/160	0.625%
6	1/102	0.980%

Number of rolls

There is initially one roll at the drop table.
Each additional brother killed grants an additional roll at the drop table, to a maximum of seven total rolls.

Chance of uniques

Each brother killed has his associated items added to the possible rewards.
First, the Barrows equipment is rolled against. The chance of getting a Barrows item is shown in fig.1. Or, in tabular format to the right.
If the Barrows item chance is successfully hit, one of the available Barrows items is chosen at random - each part has equal chance, but once chosen it will not be chosen again on future rolls.

${\begin{aligned}P(N)&={\frac {1}{450-58\times N}}&&(fig.1)\end{aligned}}$

Where P is the drop chance and N is the number of brothers killed.

Chance of other items

If the Barrows item chance is not met, an additional measure called reward potential is calculated as shown below.
- In short, reward potential is the sum of all the combat levels of the monsters killed, capped at 1000 — including the brothers (all six have a combat sum of 656). The number of brothers killed times two is then added, giving a total maximum reward potential of 1012.
A roll is performed for a value between 1 and your reward potential (each inclusive). The result then determines what item is awarded, and in what quantity.

Let $C_{n}$ be the combat level of the $n$ ^th monster killed. Then, the reward potential $R$ is

{\begin{aligned}R&=S+2N\end{aligned}}

where

S\equiv \min \left[\sum _{n}C_{n},1000\right]

and

N\equiv {\text{number of brothers killed.}}

Notes

The chance of receiving at least one piece of Barrows equipment is approximately 1/15.01^[a] if you kill all six brothers. This chance is unaffected by the rewards potential that is built by killing other monsters in the crypt. The chance of receiving a specific piece of equipment is approximately 1/350.14.^[b]
As it is possible to receive more than one piece of Barrows equipment per chest, the average number of Barrows pieces per chest is 7/102 (~1/14.57).
In order to receive a piece of Barrows equipment, the corresponding brother must be killed before the chest is looted. Thus, if you wanted a piece of Guthan's equipment, you would have to kill Guthan before you are eligible to obtain his equipment. Therefore, it is impossible to acquire Barrows equipment if no brothers are slain, although coins, runes, or bolt racks may still be awarded.
For every brother killed, you get an extra roll for rewards; so if all six brothers are killed, it is possible to obtain up to seven pieces of Barrows equipment.
It is possible to get multiple items from the same brother, but it is not possible to receive multiple copies of the same item.
Killing all of the brothers is not required to receive loot; however, not killing all brothers decreases your chance of receiving a Barrows item.

Item	RP required to unlock	RP required for maximum quantity	Chance at max RP per roll
Item	RP required to unlock	RP required for maximum quantity	Frac	%
Coins	1	380	380/1012	37.5%
Mind rune	381	505	125/1012	12.4%
Chaos rune	506	630	125/1012	12.4%
Death rune	631	755	125/1012	12.4%
Blood rune	756	880	125/1012	12.4%
File:Bolt rack.pngBolt rack	881	1005	125/1012	12.4%
Key half	1006	N/A (always 1)	6/1012	0.6%
Dragon med helm	1012	N/A (always 1)	1/1012	0.1%

Calculations

Here are some values expressing your chances of getting the items. These numbers assume you kill all the brothers each time.

Chests opened	Expected number of uniques^[c]	Probability of getting at least 1 unique	Probability of getting at least 1 specific unique	Probability of completing any set^[d]	Probability of completing a specific set^[d]	Probability of getting at least 1 of each unique
1	0.07	6.66%	0.29%	0%	0%	0%
10	0.69	49.83%	2.82%	~0%	~0%	0%
25	1.72	82.17%	6.90%	~0.01%	< 0.01%	~0%
50	3.43	96.82%	13.32%	~0.2%	~0.05%	~0%
75	5.15	99.43%	19.30%	~0.8%	~0.1%	~0%
100	6.86	99.90%	24.87%	~2.3%	~0.3%	~0%
250	17.16	~100%	51.08%	~34.5%	~6.5%	~0%
500	34.31	~100%	76.07%	~91.3%	~33.7%	~0.1%
750	51.47	~100%	88.29%	~99.6%	~60.7%	~5%
1000	68.63	~100%	94.27%	~100%	~78.8%	~24%
2000	137.26	~100%	99.67%	~100%	~98.7%	~92%

Changes

Date	Changes
[[{{#explode:16 July 2015\| \|0}} {{#explode:16 July 2015\| \|1}}]] [[{{#explode:16 July 2015\| \|2}}]] (update)	The message stating that you have received more runes from the Barrows as result of the hard tier of the Morytania achievement diary will now only appear once.
[[{{#explode:5 March 2015\| \|0}} {{#explode:5 March 2015\| \|1}}]] [[{{#explode:5 March 2015\| \|2}}]] (update \| poll)	You now receive 50% more runes from the Barrows chest if you have completed the Morytania Hard Diary.
[[{{#explode:4 September 2014\| \|0}} {{#explode:4 September 2014\| \|1}}]] [[{{#explode:4 September 2014\| \|2}}]] (update)	The Barrows chest will no longer give more than one elite clue at a time.

Notes

^ ${\frac {7655031554227}{114868566764928}}$ precisely
^ ${\frac {1504645995025870049809}{526841398983178397417472}}$ precisely
^ Including duplicates.
^ ^4.0 ^4.1 Estimate calculated using sampling, exact calculation not tractable.

References

^ Jagex. Mod Ash's Twitter account. 17 January 2023. Archived from the original on 17 January 2025. Mod Ash: "7 individual rolls. If it succeeded on one, it would skip the clue roll on subsequent trips through their loot table. And yes, the denominator would be 190 each time if the CA effect were active."
^ Jagex. Mod Kieren's Twitter account. 3 March 2016. Archived from the original on 2 September 2017. Mod Kieren: "You guys wanted info on Barrows loot, here it is... Full size: [1] Explained the best I can!"

[1] Requires 1 reward potential to roll.

[2] Requires 381 reward potential to roll.

[3] Requires 506 reward potential to roll.

[4] Requires 631 reward potential to roll.

[5] Requires 756 reward potential to roll.

[6] Requires 881 reward potential to roll.

[key-7] 7.0 ^7.1 Requires 1,006 reward potential to roll.

[8] Requires 1,012 reward potential to roll.

[10] 1/200 chance for each roll at the drop table; scales up to 1/29 with all six brothers slain.^[1]

[11] The elite clue scroll drop rate increases to 1/190–1/27.57 with the completion of the elite combat achievements.

[12] ${\frac {7655031554227}{114868566764928}}$ precisely

[13] ${\frac {1504645995025870049809}{526841398983178397417472}}$ precisely

[15] Including duplicates.

[sampling-16] 4.0 ^4.1 Estimate calculated using sampling, exact calculation not tractable.

[9] Jagex. Mod Ash's Twitter account. 17 January 2023. Archived from the original on 17 January 2025. Mod Ash: "7 individual rolls. If it succeeded on one, it would skip the clue roll on subsequent trips through their loot table. And yes, the denominator would be 190 each time if the CA effect were active."

[14] Jagex. Mod Kieren's Twitter account. 3 March 2016. Archived from the original on 2 September 2017. Mod Kieren: "You guys wanted info on Barrows loot, here it is... Full size: [1] Explained the best I can!"

[d 1]

[d 2]

[d 3]

[d 4]

[d 5]

[d 6]

[d 7]

[d 8]

[d 2]

[d 1]

[1]

[a]

[b]

[2]

[c]

[d]

Chest (Barrows)

Contents

Looting the chest