Measuring a gram without scales may seem like a daunting task, but it is possible with a few simple methods. One common method is to use a coin. A US dime weighs 2.26 grams, so you can use it to measure out approximately one gram of a substance. Another method is to use a teaspoon. A level teaspoon of water weighs about 5 grams, so you can use it to measure out approximately two grams of a substance.
There are also a number of kitchen tools that can be used to measure a gram without scales. For example, a measuring cup can be used to measure out larger amounts of a substance, and a graduated cylinder can be used to measure out smaller amounts. If you need to measure a very small amount of a substance, you can use a milligram scale.