A cooking dash approximated as 1/8 teaspoon.
Dashs to Cups Converter — dash to cup
Convert Dash (dash) to Cup (cup) using the exact conversion factor (1 dash = 0.0026041667 cup). See the formula, worked examples, conversion table, history, and common uses.
Dashs to Cups converter
Converter
Cooking Converter
Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
A US customary cup is 236.5882365 milliliters.
Result = input x 6.161152e-7 / 0.0002365882365.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Dashs to Cups
Dash and Cup both show up in recipes, and converting between them matters whenever a recipe from one country's cookbook needs to be followed with another country's measuring tools. Specifically: A cooking dash approximated as 1/8 teaspoon, and a US customary cup is 236.5882365 milliliters.
Formula
cups = dashs × 0.00260416666997
This factor comes from each unit's defined relationship to the category's base unit: 1 dash equals 6.161152e-7 base units, and 1 cup equals 0.0002365882365 base units, so dividing one by the other gives the direct dash-to-cup factor of 0.00260416666997.
Simple example
1 dash × 0.00260416667 = 0.0026041667 cup
1 dash = 0.0026041667 cups.
Real-world example
2 dash × 0.00260416667 = 0.0052083333 cup
2 dashs = 0.0052083333 cups.
Conversion table
| Dash (dash) | Cup (cup) |
|---|---|
| 0.25 dash | 0.0006510417 cup |
| 0.5 dash | 0.0013020833 cup |
| 1 dash | 0.0026041667 cup |
| 2 dash | 0.0052083333 cup |
| 4 dash | 0.0104166667 cup |
| 8 dash | 0.0208333334 cup |
Reverse conversion: Cup to Dash
0.0026041667 cup × 383.9999995 = 1.000000012 dash
0.0026041667 cups = 1.000000012 dashs.
dashs = cups × 383.999999513
For a page dedicated to this direction, see Cup to Dash.
Understanding the Dash (dash)
A cooking dash approximated as 1/8 teaspoon.
Understanding the Cup
Cup (cup) measures volume. The US customary cup used in cooking is defined as exactly 240 milliliters (a rounded culinary standard, not the older 236.588 mL legal cup). It is classified as a US customary unit (culinary).
Where it's used: United States (recipes and cooking measurement)
Cooking cup vs. legal US cup. US recipes commonly round the cup to 240 mL for convenience, while the precise legal US cup (used to derive fluid ounces, pints, etc.) is 236.588 mL — a small but sometimes noticeable difference in precise baking.
Uses of the Cup today
- US recipe and cooking measurement
- Nutrition labeling serving sizes
- Baking, where volume-based flour/sugar measurement is still common in the US
History of the Cup
The cup as a cooking measure grew out of household and community cookbook conventions in 19th-century America, standardizing what had been ad hoc measurements ('a teacup of flour') into a fixed volume.
The US FDA uses a rounded 240 mL 'metric cup' for nutrition labeling purposes, distinct from the slightly smaller legal/customary cup (236.588 mL, exactly 1/16 of a US gallon) used elsewhere.
Historical origin. Cup was not the invention of a single named person; it developed through the process described above.
Cup — sources
- US FDA — Reference Amounts Customarily Consumed — Uses the 240 mL rounded cup for nutrition labeling.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cups are in 1 dash?
1 dash equals 0.0026041667 cups, using the exact defined conversion factor rather than an estimate.
How do I convert dash to cup?
Multiply the dash value by 0.00260416667. The converter above does this instantly to whatever precision you set.
How do I convert cup back to dash?
Use the reverse factor: 1 cup equals 383.9999995 dashs. You can also use the swap control in the converter above to flip the direction instantly.
What is a dash?
Dash (dash) is a unit of cooking.
What is a cup?
Cup (cup) measures volume. The US customary cup used in cooking is defined as exactly 240 milliliters (a rounded culinary standard, not the older 236.588 mL legal cup). It is classified as a US customary unit (culinary).
Is the dash to cup conversion exact?
Yes. The US customary cup used in cooking is defined as exactly 240 milliliters (a rounded culinary standard, not the older 236.588 mL legal cup). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between cooking cup vs. legal us cup?
US recipes commonly round the cup to 240 mL for convenience, while the precise legal US cup (used to derive fluid ounces, pints, etc.) is 236.588 mL — a small but sometimes noticeable difference in precise baking.