| 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.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| tonne | t | ≡ 1000 kg | ≡ 1000 kg | Metric system SI |
| tonnes | femtograms | tonnes | femtograms |
|---|---|---|---|
| 1 | ≡ 1.0E+21 | 11 | ≡ 1.1E+22 |
| 2.5 | ≡ 2.5E+21 | 12.5 | ≡ 1.25E+22 |
| 4 | ≡ 4.0E+21 | 14 | ≡ 1.4E+22 |
| 5.5 | ≡ 5.5E+21 | 15.5 | ≡ 1.55E+22 |
| 7 | ≡ 7.0E+21 | 17 | ≡ 1.7E+22 |
| 8.5 | ≡ 8.5E+21 | 18.5 | ≡ 1.85E+22 |
| 10 | ≡ 1.0E+22 | 20 | ≡ 2.0E+22 |
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.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| femtogram | fg | ≡ 10-15 g | ≡ 10-18 kg | Metric system SI |
| femtograms | tonnes | femtograms | tonnes |
|---|---|---|---|
| 1 | ≡ 1.0E-21 | 11 | ≡ 1.1E-20 |
| 2.5 | ≡ 2.5E-21 | 12.5 | ≡ 1.25E-20 |
| 4 | ≡ 4.0E-21 | 14 | ≡ 1.4E-20 |
| 5.5 | ≡ 5.5E-21 | 15.5 | ≡ 1.55E-20 |
| 7 | ≡ 7.0E-21 | 17 | ≡ 1.7E-20 |
| 8.5 | ≡ 8.5E-21 | 18.5 | ≡ 1.85E-20 |
| 10 | ≡ 1.0E-20 | 20 | ≡ 2.0E-20 |
| tonnes | femtograms |
|---|---|
| 1 | ≡ 1.0 × 1021 |
| 1.0 × 10-21 | ≡ 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |