US Fluid Drams (fl-dr) to Kaffekoppar (kkp) conversion

What is the US Fluid Dram?

The US fluid dram (also spelled fluid drachm) is a small United States customary unit of liquid volume, historically important in pharmacy and medicine for dispensing doses of liquid medication.

Definition

The US fluid dram is defined as one eighth of a US fluid ounce, or equivalently 60 minims.

$$1\ \text{fl-dr} = 0.00369669\ \text{L}$$

Since the US fluid ounce is exactly 29.5735295625 mL, a fluid dram equals 3.6966912 mL. The UK/imperial fluid drachm is slightly larger at about 3.5516 mL (1/8 of the imperial fluid ounce).

Origin and History

"Dram" derives from the Greek drachma, an ancient coin and weight. The apothecaries' system split the fluid ounce into 8 fluid drams and each dram into 60 minims, giving pharmacists a fine graduation for compounding and measuring liquid remedies.

Law and Notable Facts

The fluid dram is a legal US customary unit but is now largely obsolete in clinical practice, superseded by milliliters. Its legacy survives in the term "dram" for a small pour of whisky and in the traditional 8-dram, 1-fluid-ounce medicine bottle.

Real-World Examples and Conversions

• A single US fluid dram is about 3.70 mL, roughly three-quarters of a metric teaspoon.
• 8 US fluid drams equal 1 US fluid ounce (29.5735 mL).
• 1 US fluid dram = 60 minims ≈ 0.75 teaspoon; 1 mL ≈ 0.2705 US fluid dram.

What is the kaffekopp?

Let's explore the Swedish unit of volume, the "Kaffekoppar," or "coffee cups."

Understanding Kaffekoppar

"Kaffekoppar" (plural of "kaffekopp") literally translates to "coffee cups" in Swedish. It's a traditional unit of volume, primarily used in cooking and baking, similar to how "cups" are used in the United States and other countries. However, unlike standardized cups, the volume of a "kaffekopp" can vary slightly depending on the specific cup being used.

Definition and Historical Context

The kaffekoppar, as a historical unit, wasn't precisely defined. It relied on the average size of coffee cups in use at the time. This lack of standardization makes precise conversions challenging. Recipes calling for "kaffekoppar" were based on the understanding that a typical coffee cup would be used.

Conversion and Volume

While not standardized, a kaffekoppar is generally accepted to be approximately 1.5 deciliters (dL). In metric terms:

1 kaffekoppar ≈ 1.5 dL

To provide conversions to other common units:

• 1 kaffekoppar ≈ 150 milliliters (mL)
• 1 kaffekoppar ≈ 5.07 US fluid ounces
• 1 kaffekoppar ≈ 5.28 Imperial fluid ounces

Practical Examples and Usage

Because of its household nature, kaffekoppar is almost exclusively used in cooking or baking recipes. Here are a few examples of how it might appear:

• Baking: A recipe for Swedish cookies might call for 2 kaffekoppar of flour.
• Cooking: A stew recipe might need 1/2 kaffekoppar of cream.
• Recipe for "Kanelbullar" (Cinnamon buns): 3 kaffekoppar of flour.

These examples illustrate how the kaffekoppar serves as a convenient, albeit imprecise, measure in home cooking.

Related Units and Considerations

It's worth noting that other traditional Swedish units of volume exist, some of which are more precisely defined. For example, the "matsked" (tablespoon) and "tesked" (teaspoon) are also used. When converting older Swedish recipes, it's essential to consider the context and possible variations in cup sizes.