| decade | 1 dec | 2 dec | 3 dec | 4 dec | 5 dec | 6 dec | 7 dec | 8 dec | 9 dec | 10 dec | 11 dec | 12 dec | 13 dec | 14 dec | 15 dec | 16 dec | 17 dec | 18 dec | 19 dec | 20 dec | 21 dec | 22 dec | 23 dec | 24 dec | 25 dec | 26 dec | 27 dec | 28 dec | 29 dec | 30 dec | 31 dec | 32 dec | 33 dec | 34 dec | 35 dec | 36 dec | 37 dec | 38 dec | 39 dec | 40 dec | 41 dec | 42 dec | 43 dec | 44 dec | 45 dec | 46 dec | 47 dec | 48 dec | 49 dec | 50 dec | 51 dec | 52 dec | 53 dec | 54 dec | 55 dec | 56 dec | 57 dec | 58 dec | 59 dec | 60 dec | 61 dec | 62 dec | 63 dec | 64 dec | 65 dec | 66 dec | 67 dec | 68 dec | 69 dec | 70 dec | 71 dec | 72 dec | 73 dec | 74 dec | 75 dec | 76 dec | 77 dec | 78 dec | 79 dec | 80 dec | 81 dec | 82 dec | 83 dec | 84 dec | 85 dec | 86 dec | 87 dec | 88 dec | 89 dec | 90 dec | 91 dec | 92 dec | 93 dec | 94 dec | 95 dec | 96 dec | 97 dec | 98 dec | 99 dec | 100 dec |
| year | 10 y | 20 y | 30 y | 40 y | 50 y | 60 y | 70 y | 80 y | 90 y | 100 y | 110 y | 120 y | 130 y | 140 y | 150 y | 160 y | 170 y | 180 y | 190 y | 200 y | 210 y | 220 y | 230 y | 240 y | 250 y | 260 y | 270 y | 280 y | 290 y | 300 y | 310 y | 320 y | 330 y | 340 y | 350 y | 360 y | 370 y | 380 y | 390 y | 400 y | 410 y | 420 y | 430 y | 440 y | 450 y | 460 y | 470 y | 480 y | 490 y | 500 y | 510 y | 520 y | 530 y | 540 y | 550 y | 560 y | 570 y | 580 y | 590 y | 600 y | 610 y | 620 y | 630 y | 640 y | 650 y | 660 y | 670 y | 680 y | 690 y | 700 y | 710 y | 720 y | 730 y | 740 y | 750 y | 760 y | 770 y | 780 y | 790 y | 800 y | 810 y | 820 y | 830 y | 840 y | 850 y | 860 y | 870 y | 880 y | 890 y | 900 y | 910 y | 920 y | 930 y | 940 y | 950 y | 960 y | 970 y | 980 y | 990 y | 1 000 y |
A decade is a period of ten years. The word is derived (via French and Latin) from the Ancient Greek: δεκάς (/ðɛkˈɑːs/, transliteration=dekas), which means a group of ten.
| 1 decades = 10 years | 6 decades = 60 years |
| 2 decades = 20 years | 7 decades = 70 years |
| 3 decades = 30 years | 8 decades = 80 years |
| 4 decades = 40 years | 9 decades = 90 years |
| 5 decades = 50 years | 10 decades = 100 years |
A year is the orbital period of the Earth moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility.
| 1 years = 0.1 decades | 6 years = 0.6 decades |
| 2 years = 0.2 decades | 7 years = 0.7 decades |
| 3 years = 0.3 decades | 8 years = 0.8 decades |
| 4 years = 0.4 decades | 9 years = 0.9 decades |
| 5 years = 0.5 decades | 10 years = 1 decades |
| 1 decades = 10 years |
| 1 years = 0.1 decades |