science

Persian units of measurement

Persian units of measurement is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Persian units of measurement rather than just read about it. In short: An official system of weights and measures was established in the ancient Persian Empire under the Achaemenid dynasty (550–350 BCE). The shekel and mina ("profane" or "sacred") were units of both weight and volume.

Key takeaways

Persian units of measurement belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Persian units of measurement to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Persian units of measurement from memory before moving on to harder problems.

Reference excerpt

An official system of weights and measures was established in the ancient Persian Empire under the Achaemenid dynasty (550–350 BCE). The shekel and mina ("profane" or "sacred") were units of both weight and volume. A shekel or mina weight was equal to the weight of that volume of water. The talent was a measure of weight used for large amounts of coinage. Some related units were used in Persia in the 19th century, and are still used in contemporary Iran.

Ancient Persian units

Length

Volume The shekel and mina ("profane" or "sacred") were units of both weight and volume. A shekel or mina weight was equal to the weight of that volume of water. Note that the values given for the mina do not match the definitions.

1 shekel = 8.3 ml (approximately 1 cubic aiwas). 1 profane mina = 50 shekel = 500 ml (approximately 27 cubic aiwas). 1 sacred mina = 60 shekel = 600 ml (approximately 1 cubic dva). 1 talent (volume) = 60 profane mina = 25 liters (approximately 1 cubic trayas).

Weight The talent was a measure of weight used for large amounts of coinage (bullion, bulk coin), rather than an individual coin. Seven Babylonian talents equalled ten Attic talents, according to a list of the revenues of Cyrus the Great recorded in Herodotus. 𐎣𐎼𐏁 (karša) or 𐎣𐎼𐏁𐎹𐎠 (karšayā) is a unit of weight equal to 10 Babylonian shekels or 1⁄6 Babylonian mina weighing approximately 83 g (2.9 oz).

Units used in modern Persia (Iran) Some related units were used in Persia in the 19th century, and are still used in contemporary Iran.

Length 1 arsani or ulna = 52–64 cm. 1 arish = 38.27 inches (97.21 cm) 1 chebel = 40 arsani = 21–25 meters or 23–30 yards. 1 farsang (parasang) = 6.23 km in 19th century Persia. 1 farsang = 10 kilometers in modern Iran and Turkey.

Volume 1 chenica = 1.32 liters.

References

Worked examples

Example 1 — a first encounter with Persian units of measurement

Start with the simplest possible case. Write down what Persian units of measurement claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Persian units of measurement before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Persian units of measurement ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Persian units of measurement

In research: Persian units of measurement appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Persian units of measurement in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Persian units of measurement is common in secondary-school and first-year university syllabi. It links to neighbouring topics Human-based units of measurement, Obsolete units of measurement, Unit of measurement stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Persian units of measurement outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Persian units of measurement in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Persian units of measurement means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Persian units of measurement out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Persian units of measurement in simple terms?

Why does Persian units of measurement matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Persian units of measurement?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Persian units of measurement.