Standard Baking Soda Weight
1 level US teaspoon of standard kitchen baking soda weighs approximately 4,800 mg (4.8 grams, range 4.6 to 5.0 g).
Baking Chemistry
Teaspoon of Baking Soda to MG Converter
Convert teaspoons of baking soda to milligrams (mg) and grams. Calculate exact weights and sodium content for 1/4 tsp, 1/2 tsp, and full teaspoons.
Density used: 0.974 g/mL — Culinary baking soda bulk density is ~0.974 g/mL. 1 level US tsp = ~4,800 mg.
Conversion direction
Water uses an approximate density of 1.000 g/mL.
Calculated result1 US tsp
4,928.92 mg
Formula used
01
Baking Soda — Teaspoon to MG Quick Reference
Pre-calculated milligram values for common teaspoon amounts of Baking Soda (density: 0.974 g/mL, US teaspoon).
| Teaspoons (tsp) | Milligrams (mg) | Grams (g) |
|---|---|---|
| 0.25 tsp | 1,200.19 mg | 1.2002 g |
| 0.5 tsp | 2,400.38 mg | 2.4004 g |
| 0.75 tsp | 3,600.58 mg | 3.6006 g |
| 1 tsp | 4,800.77 mg | 4.8008 g |
| 1.5 tsp | 7,201.15 mg | 7.2012 g |
| 2 tsp | 9,601.54 mg | 9.6015 g |
| 3 tsp | 14,402.31 mg | 14.4023 g |
| 4 tsp | 19,203.08 mg | 19.2031 g |
| 5 tsp | 24,003.85 mg | 24.0038 g |
02
Baking Soda Variants — Density Comparison
Different forms of baking soda have slightly different densities, which affects the mg result per teaspoon.
| Variant | Density (g/mL) | mg per 1 tsp (US) |
|---|---|---|
| Baking Soda (Standard Level Spoon) | 0.974 g/mL | 4,800.77 mg |
| Baking Soda (Packed / Settled) | 1.15 g/mL | 5,668.26 mg |
| Baking Powder (Double-Acting) | 0.9 g/mL | 4,436.03 mg |
| Potassium Bicarbonate (Sodium-Free) | 1.05 g/mL | 5,175.37 mg |
| Pure Sodium Bicarbonate (USP) | 1 g/mL | 4,928.92 mg |
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Key Facts about Baking Soda
High Sodium Content
Baking soda is sodium bicarbonate (NaHCO₃). 1 level teaspoon contains roughly 1,260 mg of elemental sodium (over 54% of your daily limit).
Baking Soda vs. Baking Powder
Baking powder contains starch and acid salts, weighing slightly less per teaspoon (~4,400 mg) and containing ~480 mg sodium.
Chemical Leavening
Unlike yeast, baking soda reacts instantly with acidic ingredients (buttermilk, lemon, yogurt) releasing CO₂ bubbles to leaven baked goods.
How to Convert a Teaspoon of Baking Soda to Milligrams
Teaspoons measure volume. Milligrams measure mass. To convert between them you need the substance density.
For Baking Soda, the density is approximately 0.974 g/mL. Culinary baking soda bulk density is ~0.974 g/mL. 1 level US tsp = ~4,800 mg.
Formula
mg = tsp × 4.92892 mL × 0.974 g/mL × 1000Example: 1 tsp of Baking Soda = 1 × 4.92892 × 0.974 × 1000 = 4,800.77 mg
FAQ
Frequently Asked Questions — Baking Soda to MG
How many milligrams (mg) are in 1 teaspoon of baking soda?
One level US teaspoon of baking soda weighs approximately 4,800 mg (4.8 grams), according to culinary measurement standards and USDA data.
How much sodium is in a teaspoon of baking soda in mg?
One teaspoon of baking soda contains about 1,260 mg of sodium. If you are on a sodium-restricted diet, note that baking soda is a significant sodium source.
How many mg is 1/2 teaspoon of baking soda?
A 1/2 teaspoon of baking soda weighs approximately 2,400 mg (2.4 grams) and provides about 630 mg of sodium.
How many mg is 1/4 teaspoon of baking soda?
A 1/4 teaspoon of baking soda weighs approximately 1,200 mg (1.2 grams) and provides about 315 mg of sodium.
Can I substitute baking powder for baking soda 1:1 by weight?
No. Baking powder is only about 1/3 as strong as pure baking soda. You generally need 3 times as much baking powder by volume to achieve the same leavening power.
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