Weight

Every item in RuneScape has a weight. Players can see the total weight of the items they have equipped or are carrying in their inventory on the "Equipment Stats" screen. It's measured in kilograms (kg). Many items weigh fractions of a kilogram but the Equipment Stats screen rounds to the nearest whole kilogram.

Carrying more weight causes energy to run out faster, but the player's Agility level will also affect this.

It is helpful to be lighter in tasks that involve a lot of running.

Stackable items like runes are always weightless.

Some items have a "negative weight", such as boots of lightness.