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400g Caster / Superfine Sugar = 1 ¾ cups + 1 ¼ tsp

400 grams of caster / superfine sugar equals 1 ¾ cups + 1 ¼ tsp (1.78 US Customary cups, 1.68 Metric 250 mL cups, 420.6 mL, 28.44 tablespoons, or 14.11 oz) when measured poured & leveled at a verified density of 225g per US Customary cup.

Exact decimal volume: 1.78 US Customary Cups • 1.68 Metric Cups (250 mL) • 28.44 tbsp • 14.11 oz

Batch
Measuring density
Converted Measure
400 g Caster / Superfine Sugar (poured & leveled) =
1 ¾ US Cups + 1 ¼ tsp
Physical scoop breakdown1.78 cups
1 cup
1/2 cup
1/4 cup
1 ¼ tsp
Edit either side to reverseCaster Sugar chart →
Grams
400 g
Ounces
14.11 oz
US Cups
1 ¾ cups + 1 ¼ tsp
Metric (250mL)
1.68 c
Tablespoons
28.44 tbsp
Milliliters
420.6 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 400g Caster / Superfine Sugar

Batch scaling conversion table around 400g 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×) 200g (7.05 oz) ¾ cup + 2 tbsp + ¾ tsp 210.3 mL
Standard (1×) 400g (14.11 oz) 1 ¾ cups + 1 ¼ tsp 420.6 mL
1.5× Batch 600g (21.16 oz) 2 ⅔ cups 630.9 mL
Double Batch (2×) 800g (28.22 oz) 3 ½ cups + 2 ¾ tsp 841.2 mL
Triple Batch (3×) 1200g (42.33 oz) 5 ⅓ cups 1261.8 mL

Measuring 400g 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, 400 Grams (400g) translates to 1.78 US cups (1 ¾ cups + 1 ¼ tsp). By contrast, using the spooned into cup measure (215g/cup — a 10g per-cup shift), 400g occupies 1 ¾ cups + 1 tbsp + 2 ¼ tsp (1.86 cups).

Without a kitchen scale, measure 1 ¾ cups + 1 ¼ tsp (28.44 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 400 grams of caster / superfine sugar? ▾

400 grams of caster / superfine sugar (poured & leveled, 225g per US cup) equals 1 ¾ cups + 1 ¼ tsp (1.78 US Customary Cups, 1.68 Metric 250 mL cups, or 28.44 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.