Folding rule (10) with several scale sections (20, 22, ..., 38) designed as elongated flat bars, which are connected to each other in pairs at joints (18) for folding, in which at least one scale element (24) has a first side (42) that can be covered by folding and has a first scale marking (46) that has numerical values (48) that increase in a counting direction, and one of the first side (42) has a second side (44) opposite on which a second scale marking (56) is formed, which contains ascending numerical values in the counting direction of the first scale marking (46), wherein the first side (42), which can be covered by folding, is provided with a third scale marking (70) which has descending numerical values (72) in the counting direction of the first scale marking (46), characterized by the fact that that at least one scale element (24) is connected to an adjacent scale element (26), which has a first side (42) on which only one scale marking (102) is formed, which is connected to the third scale marking (70) on the first side of the at least one scale element (24), which has ascending numerical values (104) in the counting direction of the first scale marking (46), and which has a second side (44) on which only one scale marking (114) is formed, which is connected to the second scale marking (56) on the second side (44) of the at least one scale element (24), which has ascending numerical values in the counting direction of the second scale marking (56).