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Roman Cubit to Egyptian Cubit Converter

Instant, two-way conversion across common engineering units.

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1 cubitum = 0.84723071 meh(Roman Cubit (Cubitum) → Egyptian Cubit (Meh))

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Converting Roman cubits to Egyptian cubits

To convert Roman cubits to Egyptian cubits, multiply the value by approximately 0.84723. Ancient units were reconstructed from surviving rods, buildings and written sources, so treat every result as a close approximation rather than an exact figure. Historical measurements varied by period and region, so this converter uses commonly accepted reference values.

Visual unit comparison

To scale

1 Roman cubit is approximately 0.84723 Egyptian cubits.

1 Egyptian cubit is approximately 1.1803 Roman cubits.

Roman Cubit (cubitum)

The Roman cubit, or cubitum, measured the forearm from elbow to fingertip and equalled one and a half Roman feet.

Historical context
Defined as 1.5 pes, the cubitum sat between the foot and the pace in the Roman scale and was inherited from earlier Mediterranean cubit systems.
Where it was used
Common in carpentry, masonry and textile trades, and used in written descriptions of building dimensions.
Approximate modern equivalent
Approximately 0.4436 m, roughly 44.4 cm or 17.5 inches.

Egyptian Cubit (meh)

The Egyptian royal cubit, or meh, was the principal building unit of ancient Egypt.

Historical context
Divided into 7 palms of 4 digits each, it is preserved on surviving cubit rods and is consistently reconstructed at about 523.6 mm.
Where it was used
Used to set out pyramids, temples and canals, and for land survey after the annual Nile flood.
Approximate modern equivalent
Approximately 0.5236 m, roughly 52.4 cm or 20.6 inches.

Frequently asked questions

How many Egyptian cubits are in one Roman cubit?

1 cubitum is approximately 0.84723 meh.

How do I convert Roman cubits to Egyptian cubits?

Multiply the value by approximately 0.84723. For example, 10 cubitum is approximately 8.4723 meh.

How do I convert back from Egyptian cubits to Roman cubits?

1 meh is approximately 1.1803 cubitum. The converter above works in both directions, so you can type into either field.

Why do historical measurements vary?

Ancient units were tied to body proportions and local standards rather than a central definition, so their length drifted between regions, workshops and centuries.

How accurate are these historical values?

Historical measurements varied by period and region. This converter uses commonly accepted reference values for educational and professional use, so every result should be read as an approximation rather than an exact equivalence.

Why are ancient units still referenced today?

They explain the proportions of surviving buildings. Reading a temple or basilica in its original unit reveals design grids that look arbitrary in meters.

Is this length converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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