KitchenWeightCalc
Tools

125g Caster / Superfine Sugar = ½ cup + 2 ¾ tsp

125 grams of caster / superfine sugar equals ½ cup + 2 ¾ tsp (0.56 US Customary cups, 0.53 Metric 250 mL cups, 131.4 mL, 8.89 tablespoons, or 4.41 oz) when measured poured & leveled at a verified density of 225g per US Customary cup.

Exact decimal volume: 0.56 US Customary Cups • 0.53 Metric Cups (250 mL) • 8.89 tbsp • 4.41 oz

Batch
Measuring density
Converted Measure
125 g Caster / Superfine Sugar (poured & leveled) =
½ US Cup + 2 ¾ tsp
Physical scoop breakdown0.56 cups
1/2 cup
2 ¾ tsp
Edit either side to reverseCaster Sugar chart →
Grams
125 g
Ounces
4.41 oz
US Cups
½ cup + 2 ¾ tsp
Metric (250mL)
0.53 c
Tablespoons
8.89 tbsp
Milliliters
131.4 mL

Kitchen note: Test-kitchen baseline uses poured & leveled (225g/cup). Switching to spooned into cup (215g/cup) changes each cup by 10g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around 125g Caster / Superfine Sugar

Batch scaling conversion table around 125g of Caster / Superfine Sugar (0.5× to 3× recipe batches in grams, ounces, US cups, and milliliters)
Batch Scale Weight (g / oz) US Cups & Spoons Metric (mL)
Half Batch (0.5×) 62.5g (2.2 oz) ¼ cup + 1 ¼ tsp 65.7 mL
Standard (1×) 125g (4.41 oz) ½ cup + 2 ¾ tsp 131.4 mL
1.5× Batch 187.5g (6.61 oz) ¾ cup + 1 tbsp + 1 tsp 197.2 mL
Double Batch (2×) 250g (8.82 oz) 1 ⅛ cups 262.9 mL
Triple Batch (3×) 375g (13.23 oz) 1 ⅔ cups 394.3 mL

Measuring 125g of Caster / Superfine Sugar in the Kitchen

Because 1 US Customary Cup (236.6 mL) of caster / superfine sugar weighs 225g when measured poured & leveled, 125 Grams (125g) translates to 0.56 US cups (½ cup + 2 ¾ tsp). By contrast, using the spooned into cup measure (215g/cup — a 10g per-cup shift), 125g occupies ½ cup + 1 tbsp + 1 tsp (0.58 cups).

Without a kitchen scale, measure ½ cup + 2 ¾ tsp (8.89 tablespoons total) using poured & leveled technique. Pour and level flat. Because the micro-granules pack closer together than regular granulated sugar, 1 cup weighs a dense 225 grams.

Source note: British Baker standard (225g/cup) & Domino Superfine specifications

Frequently Asked Questions

How many cups is 125 grams of caster / superfine sugar? ▾

125 grams of caster / superfine sugar (poured & leveled, 225g per US cup) equals ½ cup + 2 ¾ tsp (0.56 US Customary Cups, 0.53 Metric 250 mL cups, or 8.89 tablespoons).

Why do British and Australian recipes call for caster sugar? ▾

Caster sugar dissolves almost immediately into egg whites and butter, preventing gritty meringues and dry cake crumbs.

Why does a cup of caster sugar weigh 225g while granulated weighs 200g? ▾

Smaller crystal size means tighter packing with significantly less empty airspace between granules.