Conversion Chart
How to Calculate Gold Price By Karat & Weight
First, divide the karat (24; 18; 14; 10) by 24. Now multiply that number by today's gold price per gram. So, if you have a five-gram 10K gold ring, and the current price of gold is $1,600.00 per ounce - or $51.45 per gram ($1,600.00 divided by 31.1 grams), then your 10K gold ring is worth $21.44 per gram ($51.45 x .4167), or $107.20.
10k = 10/24 = .4167
14k = 14/24 = .5833
18k = 18/24 = .750
22k = 22/24 = .9167
If you have five- grams of 14K, and gold is $1,600.00 today, then $1,600 divided by 31.1 would equal $51.45. That figure, multiplied by .5833 (14K) comes out to $30.01 per gram. $30.01 x five- grams equals $150.05.
Some gold buyers use pennyweight (DWT) instead of grams. There are 20- pennyweights per troy ounce. Let’s say you want to sell your gold. You know it weighs 25 grams. You go to a pawn shop to see what they will pay, but they use pennyweights, not grams. Here's how to calculate the conversion: 25 grams of gold x 0.643 = 16.1 pennyweights.
Pennyweights to Grams............divide by 1.55517
Grams to Pennyweights............Multiply by 0.643