Estimate how much a gold ring weighs in grams from ring size, band width, thickness and karat, or find the pure gold content of a ring you weighed.

Estimates a solid plain band; stones and hollow parts are not counted.

US ring size; the inner diameter shown is the standard chart value.

Width as listed for the band; most wedding bands are 2โ€“6 mm, and 4 mm is common.

Metal thickness from inside to outside surface; 1.5 mm is typical for a standard band.

Typical yellow gold: 10K 11.57, 14K 13.07, 18K 15.58, 22K 17.7, 24K 19.32 g/cmยณ. White and rose alloys differ slightly.

Optional settings

Gold Ring Weight Formula

The following two example problems outline the steps and information needed to calculate the Gold Ring Weight.

GRW = RW ร— P / 100

Variables:

  • GRW is the pure-gold content of the ring (g), rather than its total alloy mass
  • RW is the total ring weight (g) 
  • P is the gold purity percentage (%) 

To calculate pure-gold content, multiply the gold-alloy mass by its purity percentage and divide by100. Nominal karat purity is K/24; use Custom percentage for a stated fineness. Dimension mode instead estimates total alloy mass as ฯ€ ร— width ร— radial thickness ร— (inner diameter + thickness) ร— density /1000, with dimensions in mm and density in g/cmยณ. This assumes a solid rectangular band without stones or voids. Yellow-gold reference densities are approximate and composition-dependent; a custom purity requires a known density.

How to Calculate Gold Ring Weight?

The following steps outline how to calculate the Gold Ring Weight.

  1. First, determine the total ring weight (g). 
  2. Next, select the stated karat or enter a custom gold purity percentage (%). 
  3. Next, gather the formula from above = GRW = RW * P / 100.
  4. Finally, calculate the Gold Ring Weight.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total ring weight (g) = 45

gold purity percentage (%) = 50

GRW = RW * P /100 =45 ร—50 /100 =22.5 g of pure gold. Select Custom percentage and50% for this example.