It is not possible to calculate this for you with the given information. Unfortunately, you are trying to convert to different types of measurements without proper data.

When you use a powder you can weigh it on a scale to determine how many grams it weighs and find the milligrams with it. If you try to weigh a liquid it will not work the same way because a liquid is based on volume.

Keep in mind this is using water as part of the equation in order to turn the product of a teaspoon into a weight in grams of water, since you have to measure it as a liquid when there is a liquid.

If you use a powder as a measurement then it becomes simple to take the weight of the powder by placing it on a scale and finding out the answer. It is a lot easier to use a scale for a powder than try to do an equation to convert the teaspoons to milligrams.

- Milligrams are a measure of mass/ weight and teaspoons are a measure of volume.

When you use a powder you can weigh it on a scale to determine how many grams it weighs and find the milligrams with it. If you try to weigh a liquid it will not work the same way because a liquid is based on volume.

- One method of conversion

Keep in mind this is using water as part of the equation in order to turn the product of a teaspoon into a weight in grams of water, since you have to measure it as a liquid when there is a liquid.

If you use a powder as a measurement then it becomes simple to take the weight of the powder by placing it on a scale and finding out the answer. It is a lot easier to use a scale for a powder than try to do an equation to convert the teaspoons to milligrams.