Teaspoons to Milligrams Conversion Calculator

Enter the volume in teaspoons below to calculate the weight in milligrams.

Results in Milligrams:
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1 tsp = 4,928.921594019 mg
4.928922 g

How to Convert Teaspoons to Milligrams

To convert a teaspoon measurement to a milligram measurement, multiply the volume by 4,928.92159 times the density of the ingredient or material.

You can use this simple formula to convert:

milligrams = teaspoons × 4,928.92159 × ingredient density

Thus, the volume in milligrams is equal to the teaspoons multiplied by 4,928.92159 times the density of the ingredient or material.

For example, here's how to convert 5 teaspoons to milligrams for an ingredient with a density of 0.7 g/mL.
5 tsp = 5 × 4,928.92159 × 0.7 = 17,251.22558 mg

Teaspoons and milligrams are both commonly used to measure cooking ingredients.

For cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements.[1] The density of dry ingredients can vary for a variety of reasons, such as compaction.

The best way to ensure an accurate conversion is to use a scale. When a scale is not available, a calculator like the one above is a good way to estimate the volume to weight conversion.

Keep reading to learn more about each unit of measure.

How Many Milligrams are in a Teaspoon?

The actual weight of a teaspoon will vary depending on the density of the material. The table below shows how many milligrams of various wet and dry ingredients are in a teaspoon.

Teaspoon measurements converted to milligrams for commonly used ingredients.
Volume in Teaspoons: Weight in Milligrams of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1/8 tsp 616.12 mg 634.6 mg 542.18 mg 325.92 mg 520.83 mg
1/4 tsp 1,232 mg 1,269 mg 1,084 mg 651.85 mg 1,042 mg
1/3 tsp 1,643 mg 1,692 mg 1,446 mg 869.13 mg 1,389 mg
1/2 tsp 2,464 mg 2,538 mg 2,169 mg 1,304 mg 2,083 mg
2/3 tsp 3,286 mg 3,385 mg 2,892 mg 1,738 mg 2,778 mg
3/4 tsp 3,697 mg 3,808 mg 3,253 mg 1,956 mg 3,125 mg
1 tsp 4,929 mg 5,077 mg 4,337 mg 2,607 mg 4,167 mg


The teaspoon is a unit of volume equal to one-third of a tablespoon.[2] One teaspoon is equal to around 4.9 milliliters, but in nutrition labeling, one teaspoon is equal to exactly 5 milliliters.[3]

The teaspoon is a US customary unit of volume. Teaspoons can be abbreviated as tsp, and are also sometimes abbreviated as t, ts, or tspn. For example, 1 teaspoon can be written as 1 tsp, 1 t, 1 ts, or 1 tspn.


The milligram is the mass equal to 1/1,000 of a gram, or 0.0154 grains.

The milligram, or milligramme, is an SI unit of weight in the metric system. In the metric system, "milli" is the prefix for 10-3. Milligrams can be abbreviated as mg; for example, 1 milligram can be written as 1 mg.


  1. National Institute of Standards & Technology, Metric Cooking Resources, https://www.nist.gov/pml/owm/metric-cooking-resources
  2. Florida Department of Agriculture and Consumer Services, Cooking Conversion Guide, https://www.fdacs.gov/content/download/17165/file/P-01775.pdf
  3. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures

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