A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
Teaspoon to Milligram
Convert Teaspoon to Milligram instantly. Free online cooking unit converter with exact formula, conversion table and FAQ.
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Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
The milligram is one-thousandth of a gram, used for very small ingredient amounts such as spices or additives.
mg = tsp × 4928.921594
Results update instantly for Teaspoon to Milligram conversions.
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Formula
mg = tsp × 4928.921594
tsp = mg × 0.0002028841362
Conversion table
| 1 tsp | 4928.921594 mg |
| 5 tsp | 24644.607969 mg |
| 10 tsp | 49289.215938 mg |
| 20 tsp | 98578.431875 mg |
| 50 tsp | 246446.079688 mg |
| 100 tsp | 492892.159375 mg |
| 500 tsp | 2464460.796875 mg |
| 1000 tsp | 4928921.59375 mg |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the teaspoon (tsp). A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
What is the destination unit in this conversion?
The destination unit is the milligram (mg). The milligram is one-thousandth of a gram, used for very small ingredient amounts such as spices or additives.
How do I convert teaspoon to milligram?
Multiply the teaspoon value by 4928.921594. For example, 10 tsp × 4928.921594 = 49289.215938 mg.
Is the teaspoon to milligram conversion exact?
Yes. This conversion uses a fixed factor defined for cooking measurement standards, so results are consistent every time.
Where is this conversion commonly used?
It's used when following recipes, adjusting ingredient quantities, or converting between US customary and metric cooking measurements.
Can I convert milligram back to teaspoon?
Yes. Multiply the milligram value by 0.0002028841362 to get teaspoon.
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About this conversion
This page converts teaspoon (tsp) to milligram (mg) within the cooking converter.
A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes. The milligram is one-thousandth of a gram, used for very small ingredient amounts such as spices or additives.
The formula is mg = tsp × 4928.921594, based on each unit's fixed relationship to the cooking converter's reference units.
Results are consistent because the conversion relies on a fixed numerical ratio rather than an estimate.
Use the calculator above for instant results, or the table below for common teaspoon values already converted to milligram.