M E N S U R A E

Weights and measures (from soilandhealth.org)
Latin terms used by Cato (italic)

  English approximations used in this translation (roman) Metric equivalent Imperial equivalent
Linear measure 1 foot (pes) = 4 palms (palmae) = 12 inches (pollices) = 16 fingers (digiti) pes: 24 centimetres 11.5 inches
Area 1 iugerum [= 240 x 120 pedes] iugerum: 0.25 hectare 0.6 acre
Dry volume 1 peck (modius) = 2 gallons (semodii) = 16 pints (sextarii) modius: 8.75 litres 2 UK gallons or 2.4 US gallons
Liquid volume 1 culleus = 20 amphorae or quadrantalia = 40 urnae = 160 congii = 960 pints (sextarii) culleus: 525 litres (5.25 hectolitres) 115 UK gallons 
139 US gallons
Volume: smaller units 1 pint (sextarius) = 2 heminae or cotulae = 3 tertiarii = 4 quartarii = 8 acetabula = 12 cyathi sextarius: 0.55 litre 1 UK pint 
1.2 US pints
Weight 1 lb. or libra = 12 ounces (unciae) libra: 0.325 kilogram 13 ounces
Apothecaries’ weight  1 pound (mina) = 100 drams (drachmae) mina: 0.44 kilogram 15.4 ounces

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