A gram scale is a scale that weighs accurately in grams or fractions of grams. I purchased one on eBay for approximately twenty dollars. Amazon would be another good source for them.
Buy a gram scale
A gram weighs exactly one gram when measured on a scale.
You can buy a healthy weight scale at Bed, Bath and Beyond. You can also buy one at Target. They are an everything-you-need kind of place. Or you can buy a scale online.
A gram of methamphetamine would weigh 1 gram on a scale.
You need a digi scale that is accurate to 1/100th of a gram. MDMA isn't "scaled out" after it's been pressed into pills, but you can buy pure, powdered MDMA (often called molly), which are usually sold in "points" (.1 of a gram, .2 of a gram, etc.)
To read 1 gram on a scale accurately, place the object on the scale and wait for the reading to stabilize. Ensure the scale is calibrated and zeroed before use. Read the measurement displayed on the scale, which should show 1 gram.
on a scale
with a scale for cooking
1.0
There are many sites where you can buy a mail scale that is approved by the USPS. USPS PS100 10-Pound Postal Scale is a very good one that you can get at amazon.com
A half gram of cocaine would weigh 0.5 grams on a digital scale.
A half gram of heroin would weigh 0.5 grams when measured on a digital scale.