Prices, Quantities & Measurements — I can talk about prices, quantities, and simple measurements using numbers and common units in familiar contexts.

Historical Context & Motivation

If you have ever walked into a Korean market, ordered food at a restaurant, or tried to ask how far something is, you quickly realize that talking about numbers in Korean is not as simple as memorizing one set of digits. Korean actually uses two separate number systems — one native Korean and one borrowed from Chinese — and knowing when to use which system is the key to sounding natural. This dual system developed over centuries of cultural exchange and has deep roots in the history of the Korean language.

So the central question this lesson addresses is: how do you choose the right number system, attach the correct counter or unit, and build natural-sounding sentences about prices, quantities, and measurements? By the end of this lesson, you will be able to ask for prices, count items, and describe simple measurements with confidence.

Core Principles & Definitions

Before diving into specific phrases, you need to understand four foundational ideas that govern how Korean handles numbers in context. These principles will guide every sentence you build about prices, quantities, and measurements.

Visual Explanation — The Dual Number System

Looking at the diagram, you can see that the native Korean system only extends practically to 99 in everyday speech — for numbers 100 and above, Korean speakers almost always switch to the Sino-Korean system. This is why prices, which are often in the thousands and tens of thousands of won, always use Sino-Korean numbers. When you count a small number of items — say, three bottles of water — you use the native system with an appropriate counter. The contracted forms (한, 두, 세, 네, 스무) are not optional; they are required whenever a counter immediately follows the number.

How It Works — Building Sentences for Prices, Quantities & Measurements

Pattern 1: Asking and Stating Prices

Pattern 2: Counting Items with Counters

Pattern 3: Stating Measurements

Notice the consistent logic: when the unit or counter is of Chinese origin (원, 미터, 킬로그램, 월 for month, 일 for day), you use Sino-Korean numbers. When you are counting discrete, tangible things with native Korean counters (개, 명, 잔, 병, 마리), you use native Korean numbers. If you remember this rule, you will pick the right system at least 90% of the time.

Detailed Breakdown — Common Counters & Units

Counters are the secret sauce of natural-sounding Korean. English speakers might think it is strange to need a special word between a number and a noun, but you actually do something similar when you say 'two sheets of paper' or 'three cups of coffee.' Korean just does this with almost every noun. Below is a reference table of the most common counters and measurement units, organized by which number system they require.

Worked Example — Ordering at a Korean Café

Imagine you walk into a Korean café. You want to order two iced Americanos, ask how much they cost, and also ask the barista how far the nearest subway station is. Let us build each sentence step by step.

Strengths, Limitations & Common Mistakes

Learning any new grammar pattern comes with pitfalls. The dual number system is one of the trickiest parts of Korean for English speakers because English simply does not have this split. Below is a comparison of common mistakes and their corrections, followed by a broader look at what makes this system manageable and where it gets tricky.

Connection to Advanced Usage

The patterns you have learned here form the foundation for more advanced Korean conversations. As you progress, you will encounter situations where numbers interact with more complex grammar — negotiating prices, comparing measurements, and expressing approximate quantities. Understanding the basic system now makes these advanced structures much more approachable.

One particularly interesting aspect of advanced Korean is the way large numbers are grouped by 만 (ten-thousands) rather than thousands as in English. This means that while English says 'one hundred thousand,' Korean says 십만 (ten ten-thousands). Getting comfortable with the basic Sino-Korean numbers now will make it much easier to handle these larger values when you encounter them in real-world contexts like rent prices, salaries, and travel distances.

Practice Problems

Lesson Summary