Imperial cup to Cubic inch
imp cup
in³
Conversion History
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Quick Reference Table (Imperial cup to Cubic inch)
| Imperial cup (imp cup) | Cubic inch (in³) |
|---|---|
| 0.25 | 4.33467863735111426916 |
| 0.5 | 8.66935727470222853832 |
| 1 | 17.33871454940445707663 |
| 2 | 34.67742909880891415326 |
| 4 | 69.35485819761782830652 |
| 8 | 138.70971639523565661305 |
About Imperial cup (imp cup)
The imperial cup is a unit of volume equal to half an imperial pint, approximately 284.1 milliliters. It was historically used in British cooking recipes and is still found in older UK and Commonwealth cookbooks. The imperial cup is distinct from the US legal cup (240 mL) and the Australian metric cup (250 mL). Since the UK's adoption of metric measures, the imperial cup has largely fallen out of use, replaced by milliliters and the 250 mL metric cup.
Older British recipes (pre-1970s) may call for cups measured as imperial cups (~284 mL). A standard UK teacup holds about 1 imperial cup.
About Cubic inch (in³)
A cubic inch (in³) is the volume of a cube with 1-inch sides, equal to approximately 16.387 milliliters. In the US, it is used for engine displacement (the classic Chevrolet 350 = 350 in³ ≈ 5.7 L), small container volumes, and pharmaceutical packaging. Car engine displacement was historically described in cubic inches before the automotive industry switched to liters in the 1980s–1990s. The unit also appears in 3D printing and medical device specifications.
A classic Chevy 350 V8 engine displaces 350 in³ (≈ 5.7 L). A standard tennis ball has a volume of about 15 in³.
Imperial cup – Frequently Asked Questions
How many milliliters is an imperial cup?
One imperial cup equals approximately 284.1 mL — half an imperial pint (568 mL). This is larger than both the US legal cup (240 mL) and the Australian metric cup (250 mL).
Is the imperial cup still used in the UK?
The imperial cup is largely obsolete in modern UK cooking, which now uses metric measurements. It may appear in old British recipe books published before the 1970s metric changeover.
How does the imperial cup compare to the US cup?
An imperial cup (284.1 mL) is about 18% larger than a US legal cup (240 mL). When using old British recipes in the US, 1 imperial cup ≈ 1.18 US cups — worth adjusting in baking.
What replaced the imperial cup in British recipes?
Modern British recipes use metric measures: milliliters (mL) for liquids and grams (g) for solids. The BBC and major UK food publishers phased out cup measures in favor of grams through the 1970s–1990s.
How many imperial cups are in an imperial gallon?
There are 16 imperial cups in one imperial gallon (8 pints × 2 cups/pint = 16 cups).
Cubic inch – Frequently Asked Questions
What is a cubic inch in milliliters?
One cubic inch equals approximately 16.387 mL. This follows from 1 inch = 2.54 cm, so 1 in³ = 2.54³ cm³ = 16.387 cm³ = 16.387 mL.
Why are car engines measured in cubic inches?
American car engines were historically described in cubic inches of displacement. The 350, 427, and 454 in³ engines are iconic V8 ratings. Most manufacturers switched to liters in the 1980s–1990s, but cubic inches remain part of classic car culture.
How many cubic inches are in a liter?
One liter equals approximately 61.024 cubic inches. A 350 in³ engine is approximately 5.74 liters.
What is cubic inch used for today?
Cubic inches are still used in the US for motorcycle and small engine displacement, small packaging volumes, and some industrial contexts. 3D printer filament usage is sometimes estimated in cubic inches.
How does cubic inch relate to fluid ounce?
One US fluid ounce equals approximately 1.805 cubic inches. One cubic inch equals about 0.554 US fluid ounces. These conversions are used in packaging design and liquid container manufacturing.