Weight

"kg" redirects here. For the reward from Karamja achievements, see Karamja gloves.

This article is about the mechanic. For other uses, see Weight (disambiguation).

Carrying less weight allows players to run for a longer period of time.

The weight of items refers to how heavy they are, and is measured in kilograms (kg). Every item has a weight, although it may be zero (for example, stackable items) or even negative, such as the boots of lightness. Weight is stored as grams, holding 3 points of precision when converted to kilograms.

Players can see the total weight of the items they are carrying on the Equipment Stats screen, under the Worn Equipment interface. This will include items they have equipped as well as those carried in the inventory. Many non-stackable items weigh fractions of a kilogram, but the Equipment Stats screen truncates (does not show the decimal portion), so these may appear as zero even though they have some slight weight.

Effects of weight

Carrying more weight causes energy to decrease more quickly. The minimum possible rate of energy loss while running is 0.7 %/tick (when your weight is 0 kg or less), while the maximum possible rate of energy loss is 1.4 %/tick. The rate of decrease of energy per kilogram has been empirically found to be 0.00729166 ± 0.00000004 %/tick/kg, that is, for every kg of weight you add on, the rate of energy loss increases by approximately 0.00729166 %/tick. However, for any given weight, the rate of energy loss is truncated to the nearest hundredth. A consequence of this is that you can carry up to 1.371 kg with exactly the same run energy drain rate as if you were carrying 0 kg.

Players who undertake activities requiring a lot of running around would be well advised to minimise the total weight they carry while doing so, since they will be able to run for longer.

Some activities in RuneScape require players to weigh no more/no less than a certain amount. For example, whilst doing the Pirate Pete part of the Recipe for Disaster quest, players must be carrying no more than 27 kg to dive off Port Khazard. In the quest Temple of Ikov, players must weigh less than 0 kg to cross a bridge just after having received the boots of lightness. To get into Movario's base (during and after While Guthix Sleeps) you need to weigh more than 1 kg.

Extrema

Heaviest items

The current 25 heaviest items in RuneScape are listed below.

Item		Weight (kg)
	Giant tablet	32
	Plump rabbit	32
	Aminishi soil	32
	Doc's broken longbow	32
	Doc's cracked orb	32
	Doc's broken dagger	32
	Doc's old clothes	32
	Doc's rotten timber	32
	Naphtha mix (quicklime)	32
	Barrel bomb (unfused)	32
	Steel girder	32
	Iron girder	32
	Astral token	32
	Big rock	32
	Naphtha mix (sulphur)	32
	Broken cannon	32
	Stone slab	32
	Toxic naphtha	32
	Naphtha apple mix	32
	Barrel of naphtha	32
	Barrel of coal-tar	32
	Barrel bomb	32
	Crate With Zanik	32
	Ana in a barrel	32
	Sandstone (32kg)	32

Heaviest item per slot (members)

Item		Slot	Weight (kg)
	Gold helmet	Head	31.751
	Diving apparatus	Back	10
	Seal of passage	Neck	4.535
	Nodon spike harness	Ammo	1
	Giant tablet	2h weapon	32
	Granite body	Torso	22.679
	Granite legs	Legs	15.875
	Penguin gloves	Hands	4.535
	Vestments of havoc boots	Feet	6
	Herculean gold ring	Ring	0.453
	Statue collection bag	Pocket	10

Heaviest item per slot (free-to-play)

Item		Slot	Weight (kg)
	Five barrels	Head	22.679
	Pathfinder cape	Back	1.814
	Cabbagespeak amulet	Neck	1.36
	Wicked pouch	Ammo	1
	Stone of power	2h weapon	30
	Adamant platebody (h5)	Torso	11.339
	Adamant plateskirt (h1)	Legs	10.432
	Penguin gloves	Hands	4.535
	Penguin feet	Feet	4.535
	Exalted silver ring	Ring	0.453
	Abyssal conduit	Pocket	1

Lightest item per slot (members)

Item		Slot	Weight (kg)
	Exoskeleton headband	Head	−2
	Wicked cape	Back	−6
	Heartfreezer amulet	Neck	0
	Blurite bolts	Ammo	0
	Magic carpet (The Jack of Spades)	2h weapon	0
	Agile top	Torso	−12
	Agile legs	Legs	−10
	Penance gloves	Hands	−7
	Boots of lightness	Feet	−4.535
	Ring of seeking (hide)	Ring	0.001
	Crafting catalyst	Pocket	0

Lightest item per slot (free-to-play)

Item		Slot	Weight (kg)
	Silver athlete's hat	Head	−0.907
	Saradominist banner	Back	0
	Heartfreezer amulet	Neck	0
	Blurite bolts	Ammo	0
	Drinking horn	2h weapon	0
	Law ethereal body	Torso	−10
	Law ethereal legs	Legs	−8
	Silver athlete's gloves	Hands	−0.907
	Silver athlete's shoes	Feet	−0.907
	Ring of seeking (hide)	Ring	0.001
	Rose petals	Pocket	0

Update history

This information has been compiled as part of the update history project. Some updates may not be included – see here for how to help out!

• patch 22 November 2012 (Update):
  • Weight has been re-added to the equip interface.

• patch 8 July 2009 (Update):
  • Reworked the code that deals with items that reduce a player's weight and with putting them in the bank.

Trivia

• Processing items sometimes changes their total weight unrealistically. For example: a bowstring and a yew longbow (unstrung) (1.346 kg together) weigh a lot less than a strung yew longbow (1.814 kg). On the other hand, smithing five steel bars (9.07 kg total) into a steel platebody (0.025 kg) reduces the total weight by over 99 percent due to a bug present since the Mining and Smithing rework.
• Sometimes RuneScape item weights are unrealistic - for example, the cannonball, which is stackable, weighs 0 kg, when one would expect it to be quite heavy. This is presumably so that the Dwarf multicannon is easier to use. Similar to how scale theory allows for a large disparity between in-game and canon representation of locations, an item having an unrealistic weight for gameplay reasons might not imply anything about its canon weight.
• There was once a glitch that activated weight-lowering items without having to wear them. A player could have a full inventory of spottier capes and weigh about -126 kg. The glitch is now fixed.
• Once a group of armour components are compressed as a set at the Grand Exchange, the set weighs 0 kg, instead of the combined weight of the individual pieces. This could be because of the fact that a compressed set acts like a note containing all the items of the set.
• The weights of items added to the game can be specified in grams, ounces, or pounds, however it is typically represented in the game using kilograms. Batwing legs, for example, weigh exactly 0.453 kg, which is (to the nearest thousandth) exactly the number of kilograms in one pound. Other armours and metals have weights which are near multiples of 0.453 kg, which means that their weights are also likely specified in pounds (with the resulting weight converted to grams and truncated).
• Technically speaking, the kilogram is a unit of mass, not weight. In physics, mass refers to the amount of matter in an object, while weight is the force exerted on that mass due to gravity. The in-game "weight" stat in RuneScape is therefore more accurately described as a quantity of mass, a common simplification in everyday language. Furthermore, the in-game weight remains constant across all space bodies (similar to physical mass). For instance, the physical weight would decrease when moving from a planet (Gielinor) to its moon (Zanaris).
• The data type used for the player's overall weight (runweight_visible, as shown in the Worn Equipment interface) appears to be something akin to a short, a signed 16-bit integer. This became apparent after the Woodcutters' Grove update. Due to a bug, logs would retain their weight while in the wood box. Due to a separate bug, noted logs could be added to the Wood box without limit, and so one could reach the maximum weight value of 32,767 kg and cause an integer overflow to wrap their weight around to -32,768 kg.