100 Grams of Sugar to Cups
½ cup in a US cup — and what that looks like with a measuring spoon
100 grams of granulated sugar is ½ cup in a US cup. In the kitchen that is ½ cup.
Grams weigh and cups fill, so the answer only exists once you say what is in the cup. A US cup of granulated sugar weighs 200 g, and every figure on this page comes from that one number.
It also depends on whose cup you mean, though not much at this weight. A 250 ml metric cup — the standard in the UK, Australia, New Zealand and Canada — holds about 5.7% more than the 236.6 ml US cup, but 100 g of granulated sugar still rounds to ½ cup in both: 0.50 US cups against 0.47 metric.
That lands exactly on the ½ cup measure, so no rounding is needed.
100 g of sugar in each cup standard
| Cup standard | Size | Grams per cup | Cups |
|---|---|---|---|
| US customary | 236.6 ml | 200 g | ½ |
| Metric (UK, AU, NZ, CA) | 250 ml | 211 g | ½ |
| Imperial (older UK) | 284 ml | 240 g | ⅜ |
A recipe that says "cups" without saying which one is almost always American. At 100 g it barely matters for granulated sugar — both cups round to the same measure — but on a larger batch the 5.7% gap compounds.
How to measure 100 g of sugar without scales
Granulated sugar does not compact the way flour does, so scooping and spooning give almost the same weight. Fill the cup and level it off.
This is white granulated sugar at 200 g per cup. Caster sugar is finer and packs to 225 g, and powdered sugar is much lighter at 120 g, so those are different conversions.
- Build it as ½ cup rather than guessing at ½ of a cup.
- 100 g is 8 tablespoons of granulated sugar, at 12.5 g per tablespoon.
- A digital scale removes the question entirely, and costs less than the ingredients it saves.
Nearby amounts of sugar
| Grams | US cups | Metric cups | Tablespoons |
|---|---|---|---|
| 77 g | ⅜ | ⅜ | 6.16 |
| 80 g | ⅜ | ⅜ | 6.4 |
| 85 g | ⅜ | ⅜ | 6.8 |
| 90 g | ½ | ⅜ | 7.2 |
| 95 g | ½ | ½ | 7.6 |
| 110 g | ½ | ½ | 8.8 |
| 115 g | ⅝ | ½ | 9.2 |
| 120 g | ⅝ | ⅝ | 9.6 |
100 g of something else
The same 100 g is a different number of cups for every ingredient, because they do not weigh the same for their size.
| Ingredient | Grams per US cup | US cups |
|---|---|---|
| Flour | 125 g | ¾ |
| Butter | 227 g | ½ |
| Water | 237 g | ⅜ |
| Rice | 185 g | ½ |
| Milk | 244 g | ⅜ |
| Oats | 90 g | 1⅛ |
| Powdered Sugar | 120 g | ⅞ |
| Brown Sugar | 220 g | ½ |
100 grams in other units
| Unit | Amount |
|---|---|
| US cups | ½ |
| Tablespoons | 8 |
| Teaspoons | 24 |
| Ounces (weight) | 3.53 oz |
| Pounds | 0.22 lb |
| Millilitres (volume it fills) | 118 ml |
Frequently asked questions
How many cups is 100 grams of sugar?
100 grams of granulated sugar is ½ cup in a US cup, based on 200 g per cup. A 250 ml metric cup rounds to the same ½ cup.
What is the easiest way to measure 100 g of sugar?
½ cup — built from a standard cup and spoon set. Granulated sugar does not compact the way flour does, so scooping and spooning give almost the same weight. Fill the cup and level it off.
Is 100 g of sugar the same in cups in the UK?
Near enough. A UK, Australian, New Zealand or Canadian metric cup is 250 ml against the US cup's 236.6 ml, so the exact answers differ — 0.50 US cups against 0.47 metric — but both round to ½ cup, and at this weight you can use either.
Can I just use ½ cup instead?
Yes — 100 g of granulated sugar is exactly ½ cup, so the nearest measure is the right one.
How many ounces is 100 grams?
100 grams is 3.53 ounces by weight. Unlike cups, that answer is the same whatever you are measuring — ounces weigh, fluid ounces fill, and they are not the same unit.