Elementær aritmetik giver mulighed for en let optælling af ruderne: Hver af de tre sider af pyramiden uden indgang har 18 trekantede ruder og 17 rækker af rombeformede arrangeret i en [[Trekanttal|trekant]], hvilket giver <math>\textstyle\frac{17\cdot(17+1)}{2}=153</math> rombeformede ruder (171 ruder i alt). Siden med indgangen har 11 ruder færre (9 romber, 2 trekantede), så hele pyramiden består af <math>4\cdot153-9=603</math> rombeformere og <math>4\cdot18-2=70</math> trekanter, 673 ruder i alt.<ref>The Glazing manufucturer, Saint-Gobain, states that there are "675 lozenges and 118 triangles," making 793 total glass panes ([https://www.saint-gobain.com/en/saint-gobain-stories/diamond-louvre-hits-30 "A Raw Diamond Cut From Glass"] {{Webarchive|url=https://web.archive.org/web/20191001210756/https://www.saint-gobain.com/en/saint-gobain-stories/diamond-louvre-hits-30 |date= 1. oktober 2019 }}, Saint Gobain website). However, these numbers appear to also include the panes in the three smaller pyramids on the north, east, and south sides of the main pyramid.</ref>
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