Numbers, Prices & Quantities — I can understand and use numbers, prices, and quantities accurately in common contexts.

Historical Context & Motivation

Numbers are among the oldest linguistic structures in any language, and German is no exception. The Germanic number system traces its roots to Proto-Germanic and ultimately to Proto-Indo-European, sharing deep cognates with English, Dutch, and the Scandinavian languages. Understanding how German numbers evolved helps explain some of the quirks that trip up modern learners—such as the infamous reversed order of tens and ones (e.g., einundzwanzig for "twenty-one"), a feature that Middle English once shared but eventually abandoned. Meanwhile, currency and measurement conventions have been shaped by centuries of trade, standardization efforts, and European integration, culminating in Germany's adoption of the euro in 2002.

For college-level learners of German, the practical question this lesson addresses is straightforward yet far-reaching: how do you accurately produce and comprehend numbers, prices, and quantities in the contexts where they matter most—shopping, dining, traveling, and academic or professional settings? Mastering these structures is not merely a matter of memorizing vocabulary; it requires understanding word-formation rules, syntactic patterns for pricing, and the conventions that distinguish German numerical communication from English.

Core Principles & Definitions

Before diving into the details, it helps to organize the domain of numbers, prices, and quantities around a set of foundational principles. Each of these principles governs a distinct area of linguistic behavior, from how compound numbers are formed to how decimal values and units of measurement interact syntactically with German nouns and verbs.

Visual Explanation: The German Number System

The following diagram maps out the structure of German cardinal numbers from 0 to 1.000.000, illustrating how each range of numbers is constructed. Pay particular attention to the color-coded zones: the base numbers (0–12) must be memorized individually, the teens (13–19) follow a unit + zehn pattern, and the compound numbers (21–99) employ the distinctive ones-before-tens structure with und as a connector.

Several irregular forms deserve special attention. The numbers sechzehn (16) and siebzehn (17) drop the final consonant of their base forms (sechs → sech-, sieben → sieb-), and this same truncation recurs in sechzig (60) and siebzig (70). Likewise, dreißig (30) uses ß rather than the expected -zig suffix. These irregularities are historical relics, but they are high-frequency forms and must simply be committed to memory.

How German Prices & Decimal Expressions Work

Expressing prices in German involves more than translating numbers—it requires understanding a distinct set of formatting rules and spoken conventions. In written German, the euro sign (€) typically follows the amount (e.g., 12,99 €), which is the reverse of the English convention ($12.99). The decimal separator is a comma, and the thousands separator—when used—is a period. In spoken German, prices are read as the euro amount followed by the cent amount, often connected by the word Euro and sometimes omitting Cent entirely.

Price Expression Patterns

Asking About Prices

Quantities, Units & Measure Nouns

Quantities in German involve a syntactic pattern that differs notably from English. When a measure noun (a word indicating a unit of measurement, container, or portion) is used with a numeral, German follows a distinctive set of agreement rules. Masculine and neuter measure nouns remain in their singular form even after plural numerals—hence drei Glas Wein (three glasses of wine), not *drei Gläser Wein in measure contexts. Feminine measure nouns, by contrast, do take plural forms: zwei Tassen Kaffee (two cups of coffee). This asymmetry reflects a broader morphological pattern in German and is essential for sounding natural in everyday transactions.

Worked Example: Ordering at a German Café

Let us walk through a realistic scenario: you are at a café in Berlin and need to order food and drinks, ask about prices, and understand the total. This worked example integrates number formation, price expressions, and quantity structures into a coherent conversational exchange.

German vs. English: Common Pitfalls & Contrasts

While German and English share Indo-European roots for their number systems, the divergences are significant enough to cause persistent errors for anglophone learners. The following table highlights the most common areas of interference and contrast, giving you a quick-reference resource for self-correction.

Beyond the Basics: Advanced Number Contexts

Once you have internalized cardinal numbers, prices, and basic quantities, several advanced contexts await. These include ordinal numbers (used for dates, floors, and rankings), year expressions, and decimal and percentage expressions in academic or professional German. The following table outlines how these advanced forms relate to the foundational system you have already learned.

As you move into these advanced areas, you will find that the foundational patterns covered in this lesson—compound number formation, the comma/period convention, and measure-noun agreement—remain the structural bedrock. Ordinal declension, for instance, simply layers standard adjective endings onto the cardinal stems you already know. The transition from conversational to academic German number usage is largely one of precision and register rather than entirely new systems.

Practice Problems

Lesson Summary