Weights of Materials
“Wow – we got this great new thing. What does it weigh?”
Metal

Weight per cubic foot

Weapon or Armor weight*

Adamantine 
400 lb.

Same as steel

Brass 
550 lb.

Same as steel

Bronze 
550 lb.

Same as steel

Cold Iron 
500 lb.

Same as steel

Copper 
550 lb.

Same as steel

Electrum 
900 lb.

Twice that of steel

Gold 
1,200 lb.

2 1/2 times that of steel

Iron 
500 lb.

Same as steel

Lead 
700 lb.

1 1/2 times that of steel

Mithral 
250 lb.

Half that of steel

Platinum 
1,350 lb.

Three times that of steel

Silver 
650 lb.

Same as steel

Steel 
500 lb.

PHB metal weapons and armor are steel

Tin 
450 lb.

Same as steel

Material

Weight per cubic foot

Weapon or Armor weight*

Acid 
90 lb.

Same as steel

Alcohol 
50 lb.


Brick 
100 lb.

One quarter that of steel

Cereal 
40 lb.


Clay 
150 lb.

One third that of steel

Coal 
80 lb.


Earth, Dry 
90 lb.


Earth, Mud 
110 lb.


Fat 
60 lb.


Flour 
30 lb.


Glass 
150 lb.

One third that of steel

Granite 
170 lb.

One third that of steel

Graphite 
130 lb.

One third that of steel

Gravel 
100 lb.


Hay 
20 lb.


Leather 
60 lb.


Lye 
100 lb.


Marble 
170 lb.

One third that of steel

Masonry, Rubble 
140 lb.


Mortar 
100 lb.


Oil 
60 lb.


Paper 
40 lb.

One tenth that of steel

Pitch 
60 lb.


Plaster 
140 lb.


Pumice 
40 lb.


Rubber 
90 lb.

One third that of steel

Sand, Dry 
100 lb.


Sand, Wet 
120 lb.


Sandstone 
150 lb.

One third that of steel

Slate 
180 lb.

One third that of steel

Snow, Freshly Fallen 
10 lb.


Snow, Wet 
50 lb.

One tenth that of steel

Soap Stone 
170 lb.

One third that of steel

Soda Ash 
70 lb.


Sodium 
60 lb.


Sulphur 
120 lb.


Tar 
70 lb.


Water 
60 lb.


Water, Ice 
50 lb.

One tenth that of steel

Wood – Green 
50 lb.

One tenth that of steel

Wood – Dry 
30 lb.

One tenth that of steel

Wool 
80 lb.

One tenth that of steel

* To calculate the weight a piece of armor or a weapon would be if made of one of these meterals, look up the weight of that item in the PHB (Player’s Handbook). Then find the material in the above table and look under the “Weapon or Armor weight” column. If it says “Same as steel” then it will weigh the same as the one in the PHB. Otherwise change the weight as indicated.
There are 1,728 cubic inches in a cubic foot. We can round that off to 2,000.
To make a quick estimate of the weight of an item, it is often easer to work in cubic inches than it is to work in cubic feet. Divide the weight per cubic foot for the material (in the table above) by 2,000. Then multiply the resulting fraction by the number of cubic inches of material in the item. Round this down to an even pound.
For metals, you can get the value of the item by multiplying the weight of the item by the metal’s value per pound (here).
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