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16 oz (1 lb) Powdered / Confectioners' Sugar = 3 ¾ cups + 1 ½ tsp

16 oz (1 lb) (453.6 grams) of powdered / confectioners' sugar equals 3 ¾ cups + 1 ½ tsp (3.78 US Customary cups, 3.58 Metric 250 mL cups, 894.3 mL, or 60.48 tablespoons) when measured unsifted spooned at a verified density of 120g per US Customary cup.

Metric weight: 453.6g • Exact volume: 3.78 US Cups • 3.58 Metric Cups • 60.48 tbsp

Batch
Measuring density
Converted Measure
16 oz Powdered / Confectioners' Sugar (unsifted spooned) =
3 ¾ US Cups + 1 ½ tsp
Physical scoop breakdown3.78 cups
1 cup
1 cup
1 cup
1/2 cup
1/4 cup
1 ½ tsp
Edit either side to reversePowdered Sugar chart →
Grams
453.6 g
Ounces
16 oz
US Cups
3 ¾ cups + 1 ½ tsp
Metric (250mL)
3.58 c
Tablespoons
60.48 tbsp
Milliliters
894.3 mL

Kitchen note: Test-kitchen baseline uses unsifted spooned (120g/cup). Switching to sifted (100g/cup) changes each cup by 20g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around 16 oz (1 lb) Powdered / Confectioners' Sugar

Batch scaling conversion table around 16 oz (1 lb) of Powdered / Confectioners' 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×) 226.8g (8 oz) 1 ¾ cups + 2 tbsp + ¾ tsp 447.1 mL
Standard (1×) 453.6g (16 oz) 3 ¾ cups + 1 ½ tsp 894.3 mL
1.5× Batch 680.4g (24 oz) 5 ⅔ cups 1341.4 mL
Double Batch (2×) 907.2g (32 oz) 7 ½ cups + 2 ¾ tsp 1788.6 mL
Triple Batch (3×) 1360.8g (48 oz) 11 ⅓ cups 2682.9 mL

Measuring 16 oz (1 lb) of Powdered / Confectioners' Sugar in the Kitchen

Because 1 US Customary Cup (236.6 mL) of powdered / confectioners' sugar weighs 120g when measured unsifted spooned, 16 Ounces (453.6g) translates to 3.78 US cups (3 ¾ cups + 1 ½ tsp). By contrast, using the sifted measure (100g/cup — a 20g per-cup shift), 16 oz occupies 4 ½ cups + 1 ¾ tsp (4.54 cups).

Without a kitchen scale, measure 3 ¾ cups + 1 ½ tsp (60.48 tablespoons total) using unsifted spooned technique. Spoon gently into the measuring cup and level flat. If your recipe calls for sifted powdered sugar, measure after sifting (100g/cup) or weigh directly.

Source note: USDA FoodData Central #169658 & Domino Confectioners 10-X specifications

Frequently Asked Questions

How many cups is 16 ounces (16 oz) of powdered / confectioners' sugar? ▾

16 ounces (453.6 grams) of powdered / confectioners' sugar (unsifted spooned, 120g per US cup) equals 3 ¾ cups + 1 ½ tsp (3.78 US Customary Cups, 3.58 Metric 250 mL cups, or 60.48 tablespoons).

Why does powdered sugar contain cornstarch? ▾

Commercial confectioners sugar contains about 3% cornstarch as an anti-caking agent to prevent the microscopic particles from clumping.

Why do recipes specify sifted versus unsifted powdered sugar? ▾

Sifted powdered sugar traps significant air, dropping cup weight from 120g down to 100g—a 20% reduction in sweetness.