The mass of a teaspoon of a substance can vary depending on what is being measured. However, as a general reference:
- 1 teaspoon of water is approximately 5 grams, which is equivalent to 5000 milligrams (mg).
Keep in mind that the density of substances can vary, so this conversion may not be accurate for all substances. It's always best to refer to specific measurements or consult a reliable source for accurate information about the mass of a teaspoon of a particular substance.