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US Teaspoons to Milligrams Converter

Convert US teaspoons (tsp) to milligrams (mg), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Convert cups and spoons to grams or ounces (or back) for a chosen ingredient, using USDA weights, or enter your own density.

The quantity to convert. Fractions such as 3/4 or 1 1/2 are accepted.
Unit you want. Swap exchanges the two units.
Weight per cup differs by ingredient and by how it is measured (sifted, packed, chopped). Each option names the assumption used; choose Other to enter your own density.
Only used when the ingredient is Other: the weight per volume of your ingredient.
Result
Converted amount
4,928.92 mg
Density used
1 g/mL (USDA FDC 174158, 1 ml = 1 g)
Exact
4,928.92159375

1 US teaspoons of water = 4,928.92 milligrams. Weights for cups and spoons vary with how the ingredient is measured, so treat this as a close estimate.

The same amount in other weight units
UnitAmount
grams4.92892
kilograms0.00492892
ounces (avoirdupois)0.173863
pounds0.0108664
Show the working
  1. 1 tsp = 4.92892159375 mL
  2. × 1 g/mL (USDA FDC 174158, 1 ml = 1 g) = 4.92892159375 g
  3. = 4928.92159375 mg

How to convert us teaspoons to milligrams

1 tsp = 4,928.92 mg, so multiply by 4,928.92 to go from US teaspoons to milligrams. Going the other way, 1 mg = 0.000202884 tsp.

mg = tsp × 4,928.92
tsp = mg × 0.000202884

Worked example:

5 tsp = 24.6446079688 mL
× 1 g/mL (USDA FDC 174158, 1 ml = 1 g) = 24.6446079688 g
= 24644.6079688 mg

US Teaspoons to milligrams table

US TeaspoonsMilligrams
1 tsp4,928.92 mg
2 tsp9,857.84 mg
3 tsp14,786.8 mg
4 tsp19,715.7 mg
5 tsp24,644.6 mg
6 tsp29,573.5 mg
7 tsp34,502.5 mg
8 tsp39,431.4 mg
9 tsp44,360.3 mg
10 tsp49,289.2 mg
15 tsp73,933.8 mg
20 tsp98,578.4 mg
25 tsp123,223 mg
30 tsp147,868 mg
40 tsp197,157 mg
50 tsp246,446 mg
75 tsp369,669 mg
100 tsp492,892 mg
250 tsp1,232,230 mg
500 tsp2,464,460 mg
1000 tsp4,928,920 mg

About the units

US Teaspoons (tsp)
US teaspoons, a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).
Milligrams (mg)
Milligrams, a metric unit. Definition: BIPM SI Brochure.

Formula version 0.1.0Reviewed