How much did a drachma weigh?

The weight of a drachma varied by weight standard. The most common Attic standard (used by Athens) set the drachma at approximately 4.3 grams of silver. The Aeginetan standard used 6.3 grams, the Corinthian standard 2.9 grams, and the Ptolemaic standard 3.5 grams. The Attic standard became dominant after Athens rose to prominence in the 5th century BC.

What were the major ancient weight standards?

Four major weight standards dominated the ancient Mediterranean: The Attic standard (4.3g per drachma) was used by Athens and became the dominant standard after Alexander the Great. The Aeginetan standard (6.3g) was the earliest Greek standard, used in the Peloponnese. The Corinthian standard (2.9g) was used in western Greek trade. The Ptolemaic standard (3.5g) was used in Hellenistic Egypt.

How did the drachma relate to the Roman denarius?

The Roman denarius was introduced around 211 BC at approximately 3.9 grams of silver, making it slightly lighter than an Attic drachma (4.3g). In practice, the two were treated as roughly equivalent in exchange. The denarius gradually lost silver content through debasement — by the 3rd century AD, it contained less than 5% silver, contributing to runaway inflation.

What could a drachma buy in ancient Athens?

In 5th-century BC Athens, one drachma was a skilled laborer's daily wage. It could buy about 6 liters of wine, 12 liters of wheat, or a modest meal for a family. A sheep cost 10-20 drachmas, a slave 150-300 drachmas, and a house 300-3000 drachmas. The Athenian state paid jurors 2-3 obols (one-third to one-half drachma) per day of service.

Why was silver the basis of ancient currency rather than gold?

Silver was more abundant than gold in the ancient Mediterranean, making it practical for everyday transactions. The Laurion silver mines near Athens funded the Athenian navy and democracy. Gold was used for high-value denominations (like the Persian daric or Macedonian stater) but was too valuable for daily commerce. Silver struck the right balance between rarity and availability for a functioning monetary system.

Ancient Currency Converter

Convert ancient Greek and Roman currency denominations to raw silver bullion weight.

Weight Standard

Drachmae

Oboloi (6 per drachma)

Roman Denarii (optional, 3.9g silver standard)

Total Silver Weight

430.00 g

100.00 drachmae at Attic standard

Troy Ounces

13.83 ozt

Modern Silver Value

~$414.84

Greek Denomination Breakdown

Unit	Equivalent	Silver Weight

How to Use the Ancient Currency Converter

Select a weight standard — choose the regional standard that applies to your coins or historical context.
Enter drachmae and oboloi — enter the number of drachmae (whole coins) and any additional oboloi (6 oboloi = 1 drachma).
Add Roman denarii — optionally include Roman silver denarii at the standard 3.9 g weight.
Read the results — total silver in grams, troy ounces, and an approximate modern value reference.

Ancient Monetary Systems: From Silver Weights to Currency

Ancient economies operated on a fundamentally different basis than modern fiat currencies. The value of a coin was determined by its metal content, not by government decree. When a merchant in the Athenian agora accepted a silver tetradrachm, they were accepting a specific weight of precious metal — approximately 17.2 grams of nearly pure silver. This intrinsic-value system made ancient commerce simultaneously robust (the metal always had value) and cumbersome (coins had to be weighed and tested for purity).

The Greek Drachma System

The Greek monetary system was built on a hierarchical weight structure:

6 oboloi = 1 drachma
100 drachmae = 1 mina
60 minae = 1 talent (approx. 25.8 kg silver)

The Attic standard, established by Athens, set the drachma at 4.3 grams of silver. This became the dominant standard across the Mediterranean after Athens rose to commercial and military prominence in the 5th century BC. Alexander the Great further spread the Attic standard across his vast empire, making it the de facto international standard of the Hellenistic world.

The Attic Standard and Its Rivals

Before Athenian dominance, the Aeginetan standard (6.3 g per drachma) was the most widely used in mainland Greece, particularly in the Peloponnese and across Aegean trade routes. The heavier Aeginetan coins facilitated bulk transactions but were gradually displaced as Athens' owl tetradrachms became the preferred international trade currency. The Corinthian standard (2.9 g) served western Mediterranean trade, while Ptolemaic Egypt adopted its own 3.5 g standard after Alexander's successors divided his empire.

The Roman Denarius

Rome introduced the silver denarius around 211 BC during the Second Punic War. Initially weighing approximately 4.5 grams, it was soon reduced to about 3.9 grams and remained relatively stable for centuries. The denarius was treated as roughly equivalent to a Greek drachma in exchange. However, unlike the remarkably consistent Athenian owl coinage, the denarius underwent progressive debasement — emperors reduced its silver content to fund military campaigns and public spending. By the reign of Septimius Severus (193-211 AD), the denarius contained only about 50% silver, and by the mid-3rd century it was essentially a bronze coin with a silver wash.

Silver Content Debasement and Inflation

The history of ancient coinage debasement offers a remarkable parallel to modern monetary policy. When Roman emperors reduced the silver content of the denarius, they could mint more coins from the same amount of metal — effectively "printing money." The economic consequences were predictable: inflation, declining trust in currency, and eventually the need for major monetary reform under Diocletian and Constantine. The Athenian owl tetradrachms, by contrast, maintained remarkably consistent silver content for over two centuries, which is why they remained trusted across the Mediterranean long after Athens had lost its political dominance.

Purchasing Power Comparisons

Translating ancient purchasing power into modern terms is inherently imprecise, but some comparisons illuminate daily life. In 5th-century Athens, a skilled laborer earned one drachma per day. A family of four could subsist on about 2-3 obols daily for basic grain. A quality amphora of wine cost 3-4 drachmas. A Roman legionary under Augustus earned 225 denarii per year (about 10 asses per day). These figures suggest that one drachma or denarius had purchasing power roughly comparable to $50-100 in modern terms, though such comparisons depend heavily on which goods you choose as the basis.

Frequently Asked Questions

The weight varied by standard. The Attic standard (Athens) set the drachma at approximately 4.3 grams of silver. The Aeginetan standard was 6.3 grams, Corinthian was 2.9 grams, and the Ptolemaic standard was 3.5 grams. The Attic standard became dominant after Athens rose to prominence in the 5th century BC.

Four standards dominated: Attic (4.3g, Athens and most of the Hellenistic world), Aeginetan (6.3g, earliest Greek standard in the Peloponnese), Corinthian (2.9g, western Greek trade), and Ptolemaic (3.5g, Hellenistic Egypt). The Attic standard became the international norm after Alexander the Great.

The Roman denarius (approximately 3.9g silver) was slightly lighter than an Attic drachma (4.3g) but treated as roughly equivalent in exchange. The denarius gradually lost silver content through debasement — by the 3rd century AD it contained less than 5% silver.

In 5th-century Athens, one drachma was a skilled laborer's daily wage. It could buy about 6 liters of wine, 12 liters of wheat, or a modest family meal. A sheep cost 10-20 drachmas, a slave 150-300 drachmas, and a house 300-3000 drachmas.

Silver was more abundant in the ancient Mediterranean, making it practical for everyday transactions. The Laurion mines near Athens funded the city's navy and democracy. Gold was reserved for high-value denominations but was too valuable for daily commerce. Silver balanced rarity with availability for a functioning monetary system.