Romeins maatsysteem


Massa 
Romeinse gewichten waren gebaseerd op de libra en het twaalfde deel daarvan de uncia (twaalfde).

De eerste tabel geeft de onderverdeling van de libra:
{| class="wikitable" style="text-align:right;"
!rowspan="2" valign="top" | Naam || colspan="3" | Gewicht
|-
!libra||uncia|| gram
|-
| align="left" ||| 1/12 || 1 ||27,92
|-
| align="left" | of || 1/8 ||3/2|| 41,88
|-
| align="left" ||| 1/6 || 2 || 55,84
|-
| align="leftt" | of || 1/4 ||3 || 83,75
|-
| align="left" ||| 1/3 || 4 || 111,67
|-
| align="left" ||| 5/12 ||5 || 139,59
|-
| align="left" | of ||1/2 || 6 || 167,51
|-
| align="left" | septunx|| 7/12 || 7 || 195,43
|-
| align="left" | of || 2/3 || 8 || 223,34
|-
| align="left" ||| 3/4 ||9 || 251,26
|-
| align="left" | || 5/6 ||10 ||279,18
|-
| align="left" |deunx || 11/12 || 11 || 307,10
|- style="background-color:#ccddff"
| align="left" | of || 1 || 12 || 335,02
|}

De tweede tabel geeft de onderverdeling van de uncia.
{| class="wikitable" style="text-align:right;"
!rowspan="2" valign="top" |Naam || colspan="2" | Gewicht
|-
!uncia|| gram
|-
| align="left" ||| 1/144 || 0,19
|-
| align="left" ||| 1/48 || 0,57
|-
| align="left" ||| 1/24 || 1,14
|-
| align="left" ||| 1/12 || 2,27
|-
| align="left" ||| 1/6 || 4,54
|-
| align="left" ||| 1/4 || 6,82
|-
| align="left" ||| 1/3 || 9,09
|-
| align="left" ||| 1/2 || 13,96
|- style="background-color:#ccddff"
| align="left" ||| 1 || 27,92
|}

Gewichten