tsp to grams Converter

A teaspoon is a volume; a gram is a mass. This calculator estimates grams from US teaspoons only after you choose a density. The built-in densities match the calculation: water 1.000 g/mL, granulated sugar 0.845 g/mL, table salt 1.217 g/mL, all-purpose flour 0.529 g/mL, honey 1.420 g/mL, vegetable oil 0.920 g/mL, and butter 0.959 g/mL. A custom option covers ingredients not listed.

That density step is the difference between a meaningful conversion and a templated chart. One teaspoon of water, sugar, flour, salt, honey, and oil all occupy the same spoon volume, but they do not weigh the same. The calculator therefore reports an estimate tied to the ingredient you selected.

Formula

The calculator first converts US teaspoons to milliliters:

$\text{mL} = \text{tsp}_{\text{US}} \times 4.92892159375$

Then it multiplies by density:

$\text{grams} = \text{mL} \times \text{density}_{\text{g/mL}}$

Combined:

$\text{grams} = \text{tsp}_{\text{US}} \times 4.92892159375 \times \text{density}_{\text{g/mL}}$

The result details also show ounces:

$\text{ounces} = \frac{\text{grams}}{28.349523125}$

Example calculation

The default input is 3 US teaspoons of water. The calculator first converts teaspoons to milliliters:

$\text{mL} = 3 \times 4.92892159375 = 14.78676$

Water’s preset density is 1.000 g/mL, so:

$\text{grams} = 14.78676 \times 1.000 = 14.78676$

The main result is rounded to about 14.79 g. The detail line shows the volume as 14.79 mL and ounces as 14.78676 divided by 28.349523125, or about 0.522 oz. If you keep 3 teaspoons but choose all-purpose flour at 0.529 g/mL, the result becomes about 7.82 g.

Reference table

Why cooking density varies

For liquids, density can change with temperature and formulation, but household estimates are often close enough for recipe scaling. For dry ingredients, density is more fragile because the spoon contains both particles and air. Flour can be aerated by sifting or compacted by scooping. Salt changes with crystal size. Sugar changes with grain size and moisture. Butter may be melted, softened, or packed, and each state affects practical measuring.

This is why grams are preferred for precision. A scale measures mass directly and bypasses the spoon-density problem. Use teaspoon estimates for quick comparisons, small recipe adjustments, and understanding labels, but use a scale when repeatability matters.

When adapting a recipe, keep the ingredient name attached to the number. “Two teaspoons equals 9.86 grams” is true only for water-like density in this calculator. The same two teaspoons become about 5.22 grams of all-purpose flour or about 14.00 grams of honey. Recording the density prevents later confusion when someone changes brands, grinds salt more finely, or switches from sifted to scooped flour.

Domains and related tools

In cooking, teaspoon-to-gram conversions help when a recipe lists a small volume but nutrition notes or scaling work require mass. In supplements, a powder’s serving scoop may be described by weight while a kitchen spoon is tempting for comparison; that comparison still requires bulk density and should not become a dosing instruction. In medicine, do not use this page to decide a dose. Follow the label, supplied dosing device, clinician, or pharmacist.

For nearby conversions, see the tsp to ml converter, ml to tsp converter, and density calculator. If you are starting from milligrams instead of teaspoons, use the mg to teaspoon converter or mg to tablespoon converter, both of which make the density assumption explicit.

For nutrition work, compare the calculated grams with package serving sizes instead of assuming a serving spoon is exact. Food databases often list common household measures, but those entries still represent a specific measured sample and may not match your pantry ingredient.

Common pitfalls

• Using one “teaspoons to grams” factor for every ingredient.
• Forgetting that the calculator uses US teaspoons, not rounded 5 mL teaspoons.
• Entering custom density in mg/mL when the field expects g/mL.
• Measuring a heaped spoon while expecting level-spoon math.
• Using a density chart without checking whether it describes packed, sifted, liquid, or granular material.

Sources

• NIST, Approximate Conversions from U.S. Customary Measures to Metric — household measure conversion context.
• NIST, SI Units: Mass — metric mass unit context.
• USDA FoodData Central, FoodData Central — food weights and measures reference database.
• FDA, Dosage Delivery Devices for Orally Ingested OTC Liquid Drug Products — cautionary source for medicine measuring devices.