| tommer | 1 in | 2 in | 3 in | 4 in | 5 in | 6 in | 7 in | 8 in | 9 in | 10 in | 11 in | 12 in | 13 in | 14 in | 15 in | 16 in | 17 in | 18 in | 19 in | 20 in | 21 in | 22 in | 23 in | 24 in | 25 in | 26 in | 27 in | 28 in | 29 in | 30 in | 31 in | 32 in | 33 in | 34 in | 35 in | 36 in | 37 in | 38 in | 39 in | 40 in | 41 in | 42 in | 43 in | 44 in | 45 in | 46 in | 47 in | 48 in | 49 in | 50 in | 51 in | 52 in | 53 in | 54 in | 55 in | 56 in | 57 in | 58 in | 59 in | 60 in | 61 in | 62 in | 63 in | 64 in | 65 in | 66 in | 67 in | 68 in | 69 in | 70 in | 71 in | 72 in | 73 in | 74 in | 75 in | 76 in | 77 in | 78 in | 79 in | 80 in | 81 in | 82 in | 83 in | 84 in | 85 in | 86 in | 87 in | 88 in | 89 in | 90 in | 91 in | 92 in | 93 in | 94 in | 95 in | 96 in | 97 in | 98 in | 99 in | 100 in |
| decimeter | 0.254 dm | 0.508 dm | 0.762 dm | 1.016 dm | 1.27 dm | 1.524 dm | 1.778 dm | 2.032 dm | 2.286 dm | 2.54 dm | 2.794 dm | 3.048 dm | 3.302 dm | 3.556 dm | 3.81 dm | 4.064 dm | 4.318 dm | 4.572 dm | 4.826 dm | 5.08 dm | 5.334 dm | 5.588 dm | 5.842 dm | 6.096 dm | 6.35 dm | 6.604 dm | 6.858 dm | 7.112 dm | 7.366 dm | 7.62 dm | 7.874 dm | 8.128 dm | 8.382 dm | 8.636 dm | 8.89 dm | 9.144 dm | 9.398 dm | 9.652 dm | 9.906 dm | 10.16 dm | 10.414 dm | 10.668 dm | 10.922 dm | 11.176 dm | 11.43 dm | 11.684 dm | 11.938 dm | 12.192 dm | 12.446 dm | 12.7 dm | 12.954 dm | 13.208 dm | 13.462 dm | 13.716 dm | 13.97 dm | 14.224 dm | 14.478 dm | 14.732 dm | 14.986 dm | 15.24 dm | 15.494 dm | 15.748 dm | 16.002 dm | 16.256 dm | 16.51 dm | 16.764 dm | 17.018 dm | 17.272 dm | 17.526 dm | 17.78 dm | 18.034 dm | 18.288 dm | 18.542 dm | 18.796 dm | 19.05 dm | 19.304 dm | 19.558 dm | 19.812 dm | 20.066 dm | 20.32 dm | 20.574 dm | 20.828 dm | 21.082 dm | 21.336 dm | 21.59 dm | 21.844 dm | 22.098 dm | 22.352 dm | 22.606 dm | 22.86 dm | 23.114 dm | 23.368 dm | 23.622 dm | 23.876 dm | 24.13 dm | 24.384 dm | 24.638 dm | 24.892 dm | 25.146 dm | 25.4 dm |
Tommerne (forkortelse: in eller ") er en længde i de britiske imperialistiske og USAs almindelige målesystemer, der nu formelt svarer til 1/36 yards, men normalt forstået som 1/12 af en fod. Afledt af den romerske uncia ("tolvte") bruges tommer også til tider til at oversætte relaterede enheder i andre målesystemer, som normalt forstås som hidrørende fra den menneskelige tommers bredde.
| 1 tommer ≡ 0.254 decimeters | 6 tommer ≡ 1.524 decimeters |
| 2 tommer ≡ 0.508 decimeters | 7 tommer ≡ 1.778 decimeters |
| 3 tommer ≡ 0.762 decimeters | 8 tommer ≡ 2.032 decimeters |
| 4 tommer ≡ 1.016 decimeters | 9 tommer ≡ 2.286 decimeters |
| 5 tommer ≡ 1.27 decimeters | 10 tommer ≡ 2.54 decimeters |
Decimeter er lig med 10-1 meter (længdeenhed), kommer fra en kombination af det metriske præfiks deci (d) og SI enhedens længde meter (m).
| 1 decimeters ≡ 3.9370078740157 tommer | 6 decimeters ≡ 23.622047244094 tommer |
| 2 decimeters ≡ 7.8740157480315 tommer | 7 decimeters ≡ 27.55905511811 tommer |
| 3 decimeters ≡ 11.811023622047 tommer | 8 decimeters ≡ 31.496062992126 tommer |
| 4 decimeters ≡ 15.748031496063 tommer | 9 decimeters ≡ 35.433070866142 tommer |
| 5 decimeters ≡ 19.685039370079 tommer | 10 decimeters ≡ 39.370078740157 tommer |
| 1 tommer ≡ 0.254 decimeters |
| 1 decimeters ≡ 3.9370079 tommer |