| femtosecond | 1 fs | 2 fs | 3 fs | 4 fs | 5 fs | 6 fs | 7 fs | 8 fs | 9 fs | 10 fs | 11 fs | 12 fs | 13 fs | 14 fs | 15 fs | 16 fs | 17 fs | 18 fs | 19 fs | 20 fs | 21 fs | 22 fs | 23 fs | 24 fs | 25 fs | 26 fs | 27 fs | 28 fs | 29 fs | 30 fs | 31 fs | 32 fs | 33 fs | 34 fs | 35 fs | 36 fs | 37 fs | 38 fs | 39 fs | 40 fs | 41 fs | 42 fs | 43 fs | 44 fs | 45 fs | 46 fs | 47 fs | 48 fs | 49 fs | 50 fs | 51 fs | 52 fs | 53 fs | 54 fs | 55 fs | 56 fs | 57 fs | 58 fs | 59 fs | 60 fs | 61 fs | 62 fs | 63 fs | 64 fs | 65 fs | 66 fs | 67 fs | 68 fs | 69 fs | 70 fs | 71 fs | 72 fs | 73 fs | 74 fs | 75 fs | 76 fs | 77 fs | 78 fs | 79 fs | 80 fs | 81 fs | 82 fs | 83 fs | 84 fs | 85 fs | 86 fs | 87 fs | 88 fs | 89 fs | 90 fs | 91 fs | 92 fs | 93 fs | 94 fs | 95 fs | 96 fs | 97 fs | 98 fs | 99 fs | 100 fs |
| fortnight | 8.2671957671958 × 10-22 fn | 1.6534391534392 × 10-21 fn | 2.4801587301587 × 10-21 fn | 3.3068783068783 × 10-21 fn | 4.1335978835979 × 10-21 fn | 4.9603174603175 × 10-21 fn | 5.787037037037 × 10-21 fn | 6.6137566137566 × 10-21 fn | 7.4404761904762 × 10-21 fn | 8.2671957671958 × 10-21 fn | 9.0939153439153 × 10-21 fn | 9.9206349206349 × 10-21 fn | 1.0747354497354 × 10-20 fn | 1.1574074074074 × 10-20 fn | 1.2400793650794 × 10-20 fn | 1.3227513227513 × 10-20 fn | 1.4054232804233 × 10-20 fn | 1.4880952380952 × 10-20 fn | 1.5707671957672 × 10-20 fn | 1.6534391534392 × 10-20 fn | 1.7361111111111 × 10-20 fn | 1.8187830687831 × 10-20 fn | 1.901455026455 × 10-20 fn | 1.984126984127 × 10-20 fn | 2.0667989417989 × 10-20 fn | 2.1494708994709 × 10-20 fn | 2.2321428571429 × 10-20 fn | 2.3148148148148 × 10-20 fn | 2.3974867724868 × 10-20 fn | 2.4801587301587 × 10-20 fn | 2.5628306878307 × 10-20 fn | 2.6455026455026 × 10-20 fn | 2.7281746031746 × 10-20 fn | 2.8108465608466 × 10-20 fn | 2.8935185185185 × 10-20 fn | 2.9761904761905 × 10-20 fn | 3.0588624338624 × 10-20 fn | 3.1415343915344 × 10-20 fn | 3.2242063492063 × 10-20 fn | 3.3068783068783 × 10-20 fn | 3.3895502645503 × 10-20 fn | 3.4722222222222 × 10-20 fn | 3.5548941798942 × 10-20 fn | 3.6375661375661 × 10-20 fn | 3.7202380952381 × 10-20 fn | 3.8029100529101 × 10-20 fn | 3.885582010582 × 10-20 fn | 3.968253968254 × 10-20 fn | 4.0509259259259 × 10-20 fn | 4.1335978835979 × 10-20 fn | 4.2162698412698 × 10-20 fn | 4.2989417989418 × 10-20 fn | 4.3816137566138 × 10-20 fn | 4.4642857142857 × 10-20 fn | 4.5469576719577 × 10-20 fn | 4.6296296296296 × 10-20 fn | 4.7123015873016 × 10-20 fn | 4.7949735449735 × 10-20 fn | 4.8776455026455 × 10-20 fn | 4.9603174603175 × 10-20 fn | 5.0429894179894 × 10-20 fn | 5.1256613756614 × 10-20 fn | 5.2083333333333 × 10-20 fn | 5.2910052910053 × 10-20 fn | 5.3736772486772 × 10-20 fn | 5.4563492063492 × 10-20 fn | 5.5390211640212 × 10-20 fn | 5.6216931216931 × 10-20 fn | 5.7043650793651 × 10-20 fn | 5.787037037037 × 10-20 fn | 5.869708994709 × 10-20 fn | 5.952380952381 × 10-20 fn | 6.0350529100529 × 10-20 fn | 6.1177248677249 × 10-20 fn | 6.2003968253968 × 10-20 fn | 6.2830687830688 × 10-20 fn | 6.3657407407407 × 10-20 fn | 6.4484126984127 × 10-20 fn | 6.5310846560847 × 10-20 fn | 6.6137566137566 × 10-20 fn | 6.6964285714286 × 10-20 fn | 6.7791005291005 × 10-20 fn | 6.8617724867725 × 10-20 fn | 6.9444444444444 × 10-20 fn | 7.0271164021164 × 10-20 fn | 7.1097883597884 × 10-20 fn | 7.1924603174603 × 10-20 fn | 7.2751322751323 × 10-20 fn | 7.3578042328042 × 10-20 fn | 7.4404761904762 × 10-20 fn | 7.5231481481481 × 10-20 fn | 7.6058201058201 × 10-20 fn | 7.6884920634921 × 10-20 fn | 7.771164021164 × 10-20 fn | 7.853835978836 × 10-20 fn | 7.9365079365079 × 10-20 fn | 8.0191798941799 × 10-20 fn | 8.1018518518519 × 10-20 fn | 8.1845238095238 × 10-20 fn | 8.2671957671958 × 10-20 fn |
Femtosecond is equal to 10-15second (unit of time), comes from a combination of the metric prefix femto (f) with the second (s). Plural name is femseconds with symbol is fs.
| 1 femtoseconds = 8.2671957671958E-22 fortnights | 6 femtoseconds = 4.9603174603175E-21 fortnights |
| 2 femtoseconds = 1.6534391534392E-21 fortnights | 7 femtoseconds = 5.787037037037E-21 fortnights |
| 3 femtoseconds = 2.4801587301587E-21 fortnights | 8 femtoseconds = 6.6137566137566E-21 fortnights |
| 4 femtoseconds = 3.3068783068783E-21 fortnights | 9 femtoseconds = 7.4404761904762E-21 fortnights |
| 5 femtoseconds = 4.1335978835979E-21 fortnights | 10 femtoseconds = 8.2671957671958E-21 fortnights |
A fortnight is a unit of time equal to 14 days (2 weeks). The word derives from the Old English: fēowertyne niht, meaning "fourteen nights".
| 1 fortnights = 1.2096E+21 femtoseconds | 6 fortnights = 7.2576E+21 femtoseconds |
| 2 fortnights = 2.4192E+21 femtoseconds | 7 fortnights = 8.4672E+21 femtoseconds |
| 3 fortnights = 3.6288E+21 femtoseconds | 8 fortnights = 9.6768E+21 femtoseconds |
| 4 fortnights = 4.8384E+21 femtoseconds | 9 fortnights = 1.08864E+22 femtoseconds |
| 5 fortnights = 6.048E+21 femtoseconds | 10 fortnights = 1.2096E+22 femtoseconds |
| 1 femtoseconds = 8.2671957671958 × 10-22 fortnights |
| 1 fortnights = 1.2096 × 1021 femtoseconds |