| tonne | 1 t | 2 t | 3 t | 4 t | 5 t | 6 t | 7 t | 8 t | 9 t | 10 t | 11 t | 12 t | 13 t | 14 t | 15 t | 16 t | 17 t | 18 t | 19 t | 20 t | 21 t | 22 t | 23 t | 24 t | 25 t | 26 t | 27 t | 28 t | 29 t | 30 t | 31 t | 32 t | 33 t | 34 t | 35 t | 36 t | 37 t | 38 t | 39 t | 40 t | 41 t | 42 t | 43 t | 44 t | 45 t | 46 t | 47 t | 48 t | 49 t | 50 t | 51 t | 52 t | 53 t | 54 t | 55 t | 56 t | 57 t | 58 t | 59 t | 60 t | 61 t | 62 t | 63 t | 64 t | 65 t | 66 t | 67 t | 68 t | 69 t | 70 t | 71 t | 72 t | 73 t | 74 t | 75 t | 76 t | 77 t | 78 t | 79 t | 80 t | 81 t | 82 t | 83 t | 84 t | 85 t | 86 t | 87 t | 88 t | 89 t | 90 t | 91 t | 92 t | 93 t | 94 t | 95 t | 96 t | 97 t | 98 t | 99 t | 100 t |
| femtogram | 1.0 × 1021 fg | 2.0 × 1021 fg | 3.0 × 1021 fg | 4.0 × 1021 fg | 5.0 × 1021 fg | 6.0 × 1021 fg | 7.0 × 1021 fg | 8.0 × 1021 fg | 9.0 × 1021 fg | 1.0 × 1022 fg | 1.1 × 1022 fg | 1.2 × 1022 fg | 1.3 × 1022 fg | 1.4 × 1022 fg | 1.5 × 1022 fg | 1.6 × 1022 fg | 1.7 × 1022 fg | 1.8 × 1022 fg | 1.9 × 1022 fg | 2.0 × 1022 fg | 2.1 × 1022 fg | 2.2 × 1022 fg | 2.3 × 1022 fg | 2.4 × 1022 fg | 2.5 × 1022 fg | 2.6 × 1022 fg | 2.7 × 1022 fg | 2.8 × 1022 fg | 2.9 × 1022 fg | 3.0 × 1022 fg | 3.1 × 1022 fg | 3.2 × 1022 fg | 3.3 × 1022 fg | 3.4 × 1022 fg | 3.5 × 1022 fg | 3.6 × 1022 fg | 3.7 × 1022 fg | 3.8 × 1022 fg | 3.9 × 1022 fg | 4.0 × 1022 fg | 4.1 × 1022 fg | 4.2 × 1022 fg | 4.3 × 1022 fg | 4.4 × 1022 fg | 4.5 × 1022 fg | 4.6 × 1022 fg | 4.7 × 1022 fg | 4.8 × 1022 fg | 4.9 × 1022 fg | 5.0 × 1022 fg | 5.1 × 1022 fg | 5.2 × 1022 fg | 5.3 × 1022 fg | 5.4 × 1022 fg | 5.5 × 1022 fg | 5.6 × 1022 fg | 5.7 × 1022 fg | 5.8 × 1022 fg | 5.9 × 1022 fg | 6.0 × 1022 fg | 6.1 × 1022 fg | 6.2 × 1022 fg | 6.3 × 1022 fg | 6.4 × 1022 fg | 6.5 × 1022 fg | 6.6 × 1022 fg | 6.7 × 1022 fg | 6.8 × 1022 fg | 6.9 × 1022 fg | 7.0 × 1022 fg | 7.1 × 1022 fg | 7.2 × 1022 fg | 7.3 × 1022 fg | 7.4 × 1022 fg | 7.5 × 1022 fg | 7.6 × 1022 fg | 7.7 × 1022 fg | 7.8 × 1022 fg | 7.9 × 1022 fg | 8.0 × 1022 fg | 8.1 × 1022 fg | 8.2 × 1022 fg | 8.3 × 1022 fg | 8.4 × 1022 fg | 8.5 × 1022 fg | 8.6 × 1022 fg | 8.7 × 1022 fg | 8.8 × 1022 fg | 8.9 × 1022 fg | 9.0 × 1022 fg | 9.1 × 1022 fg | 9.2 × 1022 fg | 9.3 × 1022 fg | 9.4 × 1022 fg | 9.5 × 1022 fg | 9.6 × 1022 fg | 9.7 × 1022 fg | 9.8 × 1022 fg | 9.9 × 1022 fg | 1.0 × 1023 fg |
The tonne (non-preferred SI derived unit; SI symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms; or one megagram (Mg); it is equivalent to approximately 2,204.6 pounds, 1.10 short tons (US) or 0.984 long tons (imperial). Although not part of the SI per se, the tonne is "accepted for use with" SI units and prefixes by the International Committee for Weights and Measures, along with several other units like the bar, litre and day.
| 1 tonnes ≡ 1.0E+21 femtograms | 11 tonnes ≡ 1.1E+22 femtograms |
| 2.5 tonnes ≡ 2.5E+21 femtograms | 12.5 tonnes ≡ 1.25E+22 femtograms |
| 4 tonnes ≡ 4.0E+21 femtograms | 14 tonnes ≡ 1.4E+22 femtograms |
| 5.5 tonnes ≡ 5.5E+21 femtograms | 15.5 tonnes ≡ 1.55E+22 femtograms |
| 7 tonnes ≡ 7.0E+21 femtograms | 17 tonnes ≡ 1.7E+22 femtograms |
| 8.5 tonnes ≡ 8.5E+21 femtograms | 18.5 tonnes ≡ 1.85E+22 femtograms |
| 10 tonnes ≡ 1.0E+22 femtograms | 20 tonnes ≡ 2.0E+22 femtograms |
Femtogram or femtogramme is equal to 10-15 gram (unit of mass), comes from a combination of the metric prefix femto (f) with the gram (g). Plural name is femtograms.
| 1 femtograms ≡ 1.0E-21 tonnes | 11 femtograms ≡ 1.1E-20 tonnes |
| 2.5 femtograms ≡ 2.5E-21 tonnes | 12.5 femtograms ≡ 1.25E-20 tonnes |
| 4 femtograms ≡ 4.0E-21 tonnes | 14 femtograms ≡ 1.4E-20 tonnes |
| 5.5 femtograms ≡ 5.5E-21 tonnes | 15.5 femtograms ≡ 1.55E-20 tonnes |
| 7 femtograms ≡ 7.0E-21 tonnes | 17 femtograms ≡ 1.7E-20 tonnes |
| 8.5 femtograms ≡ 8.5E-21 tonnes | 18.5 femtograms ≡ 1.85E-20 tonnes |
| 10 femtograms ≡ 1.0E-20 tonnes | 20 femtograms ≡ 2.0E-20 tonnes |
| 1 tonnes ≡ 1.0 × 1021 femtograms |
| 1 femtograms ≡ 1.0 × 10-21 tonnes |