Convert Caster Sugar from Teaspoon to Ounces

How many ounces is 1 teaspoon of caster sugar?

1 teaspoon of caster sugar (castor sugar) is 0.16 ounces. 2 teaspoons of caster sugar is 0.32 ounces. 1/2 teaspoon of caster sugar is 0.08 ounces. 1/4 teaspoon (0.25 teaspoon) of caster sugar is 0.04 ounces. Use the converter below for any amount.

  • A teaspoon here is the 5 ml standard, the same in the UK, Europe, and Australia. A US teaspoon is fractionally smaller at about 4.9 ml. When teaspoon size matters →
  • A little over or under won't ruin the bake. An extra spoon mainly makes it sweeter.

Caster sugar, also known as superfine or castor sugar, is a key ingredient in many baking recipes due to its fine texture and quick-dissolving properties. Commonly used in cakes, meringues, and desserts, it sits between granulated sugar and powdered sugar in terms of texture. One metric cup (250 ml) of caster sugar weighs around 225 grams or 7.94 ounces.

Since baking is a precise science, even small differences in sugar quantity can affect the final outcome, from texture and sweetness to structure. This page helps you convert caster sugar between grams, cups, tablespoons, and more so that you can follow any recipe confidently, no matter what measurement system it uses.

Also known as

  • castor sugar
  • Superfine Sugar
  • Baker's Sugar
  • Bar Sugar

Related Caster Sugar Ingredients

Standard granulated sugar has larger crystals than caster sugar, so it dissolves more slowly in batters and meringues. They are close in weight (200 g vs 225 g per cup) and swap 1:1 by volume in most recipes, though caster gives a smoother result. See what 1 teaspoon of sugar is in ounces.

Raw sugar has large, coarse crystals that dissolve slowly, the opposite of fine caster sugar. It packs lighter (200 g vs 225 g per cup), so it is not a 1:1 swap by volume; weigh when substituting. See what 1 teaspoon of raw sugar is in ounces.

Out of caster sugar? See caster sugar substitutes →

No measuring spoons? The tool below gets you close, and a measuring spoon set keeps small amounts accurate.

Nail small amounts, get spoons

Caster Sugar Measurement Converter

Enter a value and pick your units.

Result

0.16 Ounces

Caster Sugar Calculators & Baking Tools

Working with caster sugar? These tools handle the jobs a converter cannot.

Common Caster Sugar Conversions

Here are the most common caster sugar conversions from teaspoons to ounces.

TeaspoonsOunces
0.25 tsp0.04 oz
0.5 tsp0.08 oz
1 tsp0.16 oz
2 tsp0.32 oz
3 tsp0.48 oz
4 tsp0.64 oz
6 tsp0.95 oz
8 tsp1.27 oz
12 tsp1.91 oz

Caster Sugar Conversion Chart

The conversion chart below gives a quick reference for converting caster sugar from Teaspoon to Ounces and other measurements.

tspouncescupgramslbkgcup(US)tbsp
1 tsp0.16 oz0.02 cup4.5 g0.01 lb0 kg0.02 cup (US)0.33 tbsp
2 tsp0.32 oz0.04 cup9 g0.02 lb0.01 kg0.04 cup (US)0.67 tbsp
3 tsp0.48 oz0.06 cup13.5 g0.03 lb0.01 kg0.06 cup (US)1 tbsp
4 tsp0.64 oz0.08 cup18 g0.04 lb0.02 kg0.08 cup (US)1.33 tbsp

For the reverse conversion, see 1 ounce of caster sugar in teaspoons.

Frequently Asked Questions

What is 1 teaspoon of caster sugar in ounces?
1 teaspoon of caster sugar is 0.16 ounces. The ratio is fixed, so 2 teaspoons of caster sugar is 0.32 ounces and 0.5 teaspoons is 0.08 ounces. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the caster sugar converter
How many ounces is 1.5 teaspoons of caster sugar?
1.5 teaspoons of caster sugar is 0.24 ounces. The ratio is fixed, so 1 teaspoon of caster sugar is 0.16 ounces and 2 teaspoons is 0.32 ounces. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
What is 2 teaspoons of caster sugar in ounces?
2 teaspoons of caster sugar is 0.32 ounces. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 teaspoon of caster sugar is 0.16 ounces, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact ounces reading.
How many teaspoons of caster sugar is 0.16 ounces?
0.16 ounces of caster sugar is 1.01 teaspoons. The conversion works the same in reverse, so you can switch between ounces and teaspoons without changing the result. This helps when a recipe lists teaspoons but you would rather weigh or measure in ounces. The converter above and the chart below cover both directions for any amount.
How much is 1 teaspoon of castor sugar in ounces?
Castor sugar is another name for caster sugar, so 1 teaspoon of castor sugar is 0.16 ounces, exactly the same as caster sugar. The figure does not change with the name: 2 teaspoons is 0.32 ounces and 0.5 teaspoons is 0.08 ounces. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Are caster sugar and castor sugar the same thing?
Yes. Castor sugar is another name for caster sugar, so they are the same ingredient and convert identically. 1 teaspoon of caster sugar is 0.16 ounces under either name, and 2 teaspoons is 0.32 ounces. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
What is 1/2 tsp caster sugar in ounces?
1/2 teaspoon of caster sugar is 0.08 ounces. The ratio is fixed, so 1 teaspoon of caster sugar is 0.16 ounces and 2 teaspoons is 0.32 ounces. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart below for the common ones.
What is 1/4 tsp caster sugar in ounces?
1/4 teaspoon (0.25 teaspoon) of caster sugar is 0.04 ounces. The ratio is fixed, so 1 teaspoon of caster sugar is 0.16 ounces and 2 teaspoons is 0.32 ounces. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

Other Ingredients

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