US Teaspoons to Milligrams: how it works
This mode fixes the teaspoon system to the US definition. Enter teaspoons and density to calculate the corresponding mass in milligrams.
Teaspoons measure volume and milligrams measure mass. Density in g/mL is the required bridge between them.
US Teaspoons to Milligrams formula
mg = US tsp × 4.92892159375 × density(g/mL) × 1000Internal calculations retain full precision; displayed results are rounded for readability.
01
Before you calculate
01One US teaspoon is exactly 4.92892159375 mL.
02One US tsp of water is approximately 4,928.92 mg.
03Other substances require their own density.
04Keep density units in g/mL.