US teaspoon definition

US Teaspoons to Milligrams Calculator

Convert US teaspoons to milligrams using 1 US tsp = 4.92892159375 mL and the density of the substance.

Conversion direction
Teaspoon system

Water uses an approximate density of 1.000 g/mL.

Calculated result1 US tsp
4,928.92 mg
Formula used

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) × 1000

Internal calculations retain full precision; displayed results are rounded for readability.

01

Before you calculate

01

One US teaspoon is exactly 4.92892159375 mL.

02

One US tsp of water is approximately 4,928.92 mg.

03

Other substances require their own density.

04

Keep density units in g/mL.

02

Related calculators