Convert Imperial Cup to Liter
Convert imperial cups to liters instantly. 1 imperial cup = 0.284130625 liter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Liter to Imperial Cup converter for the reverse conversion.
Units explained
Imperial Cup
An imperial cup is half an imperial pint (284.131 mL).
A British cooking measure.
Used in older British and Commonwealth recipes.
UK cooking measure.
Liter
The liter is a metric unit of volume equal to one cubic decimeter (0.001 m³). It is the everyday metric volume unit.
Introduced in France in 1795; redefined in 1964 as exactly one cubic decimeter.
The world's common unit for beverages, fuel, and household liquids.
France, 1795; CGPM 1964.
Imperial Cup to Liter conversion formula
The relationship between imperial cups and liters:
To convert imperial cups to liters, multiply the value in imperial cups by 0.284130625. To reverse, multiply liters by 3.5195079728.
How to use this converter
Type a value into the calculator. The result in liters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Liter to Imperial Cup converter for the reverse direction.
Step-by-step: convert imperial cups to liters
- Write down the value in imperial cups (cup).
- Multiply that value by the factor 0.284130625.
- The product is the equivalent value in liters (L).
- To reverse, multiply the liter value by 3.5195079728.
Worked examples
Example 1 — Convert 1 cup to L:
1 × 0.284130625 = 0.284130625 L
Example 2 — Convert 100 cup to L:
100 × 0.284130625 = 28.4130625 L
Real-world example — Packaging gauge
A 4-imperial cup plastic bag thickness is a common spec for grocery and freezer bags. Converting from imperial cups to liters is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 cup × 0.284130625 = 1.1365225 L
Real-world example — Plastic film and laminate thickness
A 500-imperial cup sheet is a typical spec for ID-card laminates and film overlays. Converting to liters aligns the value with the unit most CAD systems and material datasheets prefer.
500 cup × 0.284130625 = 142.0653125 L
Imperial Cup to Liter conversion table
Standard reference values for converting imperial cups to liters:
| Imperial Cup [cup] | Liter [L] |
|---|---|
| 0.01 | 0.0028413062 |
| 0.1 | 0.0284130625 |
| 1 | 0.284130625 |
| 2 | 0.56826125 |
| 3 | 0.852391875 |
| 4 | 1.1365225 |
| 5 | 1.420653125 |
| 10 | 2.84130625 |
| 20 | 5.6826125 |
| 30 | 8.52391875 |
| 40 | 11.365225 |
| 50 | 14.20653125 |
| 100 | 28.4130625 |
| 500 | 142.0653125 |
| 1000 | 284.130625 |
Frequently asked questions
How many liters is 1 imperial cup?
How do I convert imperial cups to liters?
How do I convert liters back to imperial cups?
How many liters is 100 imperial cups?
Popular volume unit conversions
Convert Imperial Cup to other volume units
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Metric / SI (3 units)
US Customary (Liquid) (1 units)
Imperial (UK) (1 units)
Cubic (length-derived) (1 units)
Sources & references
Conversion factor (1 cup = 0.284130625 L) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.