How this instrument works
A teaspoon is the smallest standard volume most kitchens measure with, at exactly 1/48 of a US cup, which makes it the natural unit for baking powder, salt, vanilla, and other ingredients used in amounts too small for a tablespoon to measure precisely. The same rule that governs cups and tablespoons still applies here: how much a teaspoon of something weighs depends entirely on the ingredient, because volume and mass measure different things.
This instrument shares its reference weight-per-cup figures with this site's cup and tablespoon converters, scaled down to teaspoons — since 1 US cup equals exactly 48 teaspoons by definition, regardless of what's filling it. Enter a gram amount and pick from ten common ingredients, and it returns the teaspoon amount that ingredient's weight actually fills.
At teaspoon scale, small errors matter more than they do at cup scale, because a fraction of a gram is a much larger share of the total. For ingredients like leaveners or salt, where the amount genuinely changes how a recipe turns out, weigh directly on a scale that reads to a tenth of a gram if one is available, rather than relying on a converted teaspoon measured by eye.
- Select the Ingredient you're measuring — the reference weight per teaspoon is different for every option on the list.
- Enter the amount in Grams called for by the recipe or shown on a kitchen scale.
- Read Teaspoons — the volume that gram weight fills for the ingredient chosen.
- For very small doses, such as a fraction of a teaspoon, use a set of measuring spoons with 1/4 and 1/8 teaspoon markings rather than trying to estimate a fraction of the full teaspoon by eye.
Worked example — 4.7 g of butter
A recipe calls for 4.7 g of butter to grease a small ramekin, and the kitchen scale is being used for something else. Butter's reference weight is 0.50 lb per cup, or 0.50 × 453.59237 = 226.796185 g per cup — divided by 48 teaspoons per cup, that's 4.72492 g per teaspoon. Dividing: tsp = (4.7 × 48) ÷ 226.796185 = 0.994726 teaspoons.
That's close enough to exactly 1 level teaspoon that using a standard teaspoon measure of softened butter lands within about half a percent of the recipe's intended 4.7 g — well inside the margin that matters for greasing a dish, though a scale still gives the more exact figure when the amount genuinely changes a bake's texture.
Questions
How many grams of butter are in a teaspoon?
About 4.72 g per teaspoon by this calculator's reference figure, which lines up closely with the widely repeated kitchen shorthand of roughly 4.7-5 g per teaspoon of butter. The small variation between sources comes down to how the underlying weight-per-cup reference was rounded, not a disagreement about butter's actual density.
Why does salt weigh more per teaspoon than sugar?
Because table salt's crystals pack more densely than granulated sugar's, leaving less air between particles for the same volume — salt's reference weight is 0.63 lb per cup versus sugar's 0.44 lb per cup, about 43% heavier for the identical teaspoon. This is exactly why recipes specify salt by volume (teaspoons) rather than by a single universal gram figure: the same teaspoon holds meaningfully different weights of different seasonings.
Is a teaspoon measurement accurate enough for baking powder or yeast?
For most home baking, yes — a level teaspoon measured with a standard measuring spoon is precise enough for leaveners in typical recipes. For very small or very precise doses, such as scaling a recipe up or down significantly, a scale that reads to a tenth of a gram removes the guesswork of eyeballing a fraction of a teaspoon, which is where most measuring-spoon error creeps in.
How many teaspoons are in a tablespoon?
Exactly 3, by definition of the US customary system — this fixed relationship (3 tsp = 1 tbsp, 16 tbsp = 1 cup, so 48 tsp = 1 cup) is what lets this calculator and this site's tablespoon converter share the same underlying reference weights and just apply a different scaling factor.
Does the type of measuring spoon set affect the result?
It can, slightly — measuring spoon sets aren't perfectly standardized across every manufacturer, and how level a scoop is packed introduces its own small variation on top of that. This calculator assumes a standard US teaspoon (about 4.93 mL) leveled off, which is the convention nearly all US recipes and spoon sets are built around, so the gap in practice is usually small enough to ignore.