What is the weight of 9mm rebar?

The weight of 9mm rebar (also known as #3 rebar) is approximately 0.39 kg per meter (or about 0.26 pounds per foot). To calculate the total weight for a specific length, you can multiply the length in meters by 0.39 kg/m. For example, a 10-meter length of 9mm rebar would weigh around 3.9 kg.