| troy pound | 1 lb t | 2 lb t | 3 lb t | 4 lb t | 5 lb t | 6 lb t | 7 lb t | 8 lb t | 9 lb t | 10 lb t | 11 lb t | 12 lb t | 13 lb t | 14 lb t | 15 lb t | 16 lb t | 17 lb t | 18 lb t | 19 lb t | 20 lb t | 21 lb t | 22 lb t | 23 lb t | 24 lb t | 25 lb t | 26 lb t | 27 lb t | 28 lb t | 29 lb t | 30 lb t | 31 lb t | 32 lb t | 33 lb t | 34 lb t | 35 lb t | 36 lb t | 37 lb t | 38 lb t | 39 lb t | 40 lb t | 41 lb t | 42 lb t | 43 lb t | 44 lb t | 45 lb t | 46 lb t | 47 lb t | 48 lb t | 49 lb t | 50 lb t | 51 lb t | 52 lb t | 53 lb t | 54 lb t | 55 lb t | 56 lb t | 57 lb t | 58 lb t | 59 lb t | 60 lb t | 61 lb t | 62 lb t | 63 lb t | 64 lb t | 65 lb t | 66 lb t | 67 lb t | 68 lb t | 69 lb t | 70 lb t | 71 lb t | 72 lb t | 73 lb t | 74 lb t | 75 lb t | 76 lb t | 77 lb t | 78 lb t | 79 lb t | 80 lb t | 81 lb t | 82 lb t | 83 lb t | 84 lb t | 85 lb t | 86 lb t | 87 lb t | 88 lb t | 89 lb t | 90 lb t | 91 lb t | 92 lb t | 93 lb t | 94 lb t | 95 lb t | 96 lb t | 97 lb t | 98 lb t | 99 lb t | 100 lb t |
| femtogram | 3.732417216 × 1017 fg | 7.464834432 × 1017 fg | 1.1197251648 × 1018 fg | 1.4929668864 × 1018 fg | 1.866208608 × 1018 fg | 2.2394503296 × 1018 fg | 2.6126920512 × 1018 fg | 2.9859337728 × 1018 fg | 3.3591754944 × 1018 fg | 3.732417216 × 1018 fg | 4.1056589376 × 1018 fg | 4.4789006592 × 1018 fg | 4.8521423808 × 1018 fg | 5.2253841024 × 1018 fg | 5.598625824 × 1018 fg | 5.9718675456 × 1018 fg | 6.3451092672 × 1018 fg | 6.7183509888 × 1018 fg | 7.0915927104 × 1018 fg | 7.464834432 × 1018 fg | 7.8380761536 × 1018 fg | 8.2113178752 × 1018 fg | 8.5845595968 × 1018 fg | 8.9578013184 × 1018 fg | 9.33104304 × 1018 fg | 9.7042847616 × 1018 fg | 1.00775264832 × 1019 fg | 1.04507682048 × 1019 fg | 1.08240099264 × 1019 fg | 1.1197251648 × 1019 fg | 1.15704933696 × 1019 fg | 1.19437350912 × 1019 fg | 1.23169768128 × 1019 fg | 1.26902185344 × 1019 fg | 1.3063460256 × 1019 fg | 1.34367019776 × 1019 fg | 1.38099436992 × 1019 fg | 1.41831854208 × 1019 fg | 1.45564271424 × 1019 fg | 1.4929668864 × 1019 fg | 1.53029105856 × 1019 fg | 1.56761523072 × 1019 fg | 1.60493940288 × 1019 fg | 1.64226357504 × 1019 fg | 1.6795877472 × 1019 fg | 1.71691191936 × 1019 fg | 1.75423609152 × 1019 fg | 1.79156026368 × 1019 fg | 1.82888443584 × 1019 fg | 1.866208608 × 1019 fg | 1.90353278016 × 1019 fg | 1.94085695232 × 1019 fg | 1.97818112448 × 1019 fg | 2.01550529664 × 1019 fg | 2.0528294688 × 1019 fg | 2.09015364096 × 1019 fg | 2.12747781312 × 1019 fg | 2.16480198528 × 1019 fg | 2.20212615744 × 1019 fg | 2.2394503296 × 1019 fg | 2.27677450176 × 1019 fg | 2.31409867392 × 1019 fg | 2.35142284608 × 1019 fg | 2.38874701824 × 1019 fg | 2.4260711904 × 1019 fg | 2.46339536256 × 1019 fg | 2.50071953472 × 1019 fg | 2.53804370688 × 1019 fg | 2.57536787904 × 1019 fg | 2.6126920512 × 1019 fg | 2.65001622336 × 1019 fg | 2.68734039552 × 1019 fg | 2.72466456768 × 1019 fg | 2.76198873984 × 1019 fg | 2.799312912 × 1019 fg | 2.83663708416 × 1019 fg | 2.87396125632 × 1019 fg | 2.91128542848 × 1019 fg | 2.94860960064 × 1019 fg | 2.9859337728 × 1019 fg | 3.02325794496 × 1019 fg | 3.06058211712 × 1019 fg | 3.09790628928 × 1019 fg | 3.13523046144 × 1019 fg | 3.1725546336 × 1019 fg | 3.20987880576 × 1019 fg | 3.24720297792 × 1019 fg | 3.28452715008 × 1019 fg | 3.32185132224 × 1019 fg | 3.3591754944 × 1019 fg | 3.39649966656 × 1019 fg | 3.43382383872 × 1019 fg | 3.47114801088 × 1019 fg | 3.50847218304 × 1019 fg | 3.5457963552 × 1019 fg | 3.58312052736 × 1019 fg | 3.62044469952 × 1019 fg | 3.65776887168 × 1019 fg | 3.69509304384 × 1019 fg | 3.732417216 × 1019 fg |
The troy pound is 5 760 grains (≈ 373.24 g, 12 oz t), while an avoirdupois pound is approximately 21.53% heavier at 7 000 grains (≈ 453.59 g).
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| troy pound | lb t | ≡ 5760 grains | = 0.3732417216 kg | Imperial/US |
| troy pounds | femtograms | troy pounds | femtograms |
|---|---|---|---|
| 1 | = 3.732417216E+17 | 11 | = 4.1056589376E+18 |
| 2.5 | = 9.33104304E+17 | 12.5 | = 4.66552152E+18 |
| 4 | = 1.4929668864E+18 | 14 | = 5.2253841024E+18 |
| 5.5 | = 2.0528294688E+18 | 15.5 | = 5.7852466848E+18 |
| 7 | = 2.6126920512E+18 | 17 | = 6.3451092672E+18 |
| 8.5 | = 3.1725546336E+18 | 18.5 | = 6.9049718496E+18 |
| 10 | = 3.732417216E+18 | 20 | = 7.464834432E+18 |
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 | troy pounds | femtograms | troy pounds |
|---|---|---|---|
| 1 | = 2.679228880719E-18 | 11 | = 2.9471517687909E-17 |
| 2.5 | = 6.6980722017975E-18 | 12.5 | = 3.3490361008987E-17 |
| 4 | = 1.0716915522876E-17 | 14 | = 3.7509204330066E-17 |
| 5.5 | = 1.4735758843954E-17 | 15.5 | = 4.1528047651144E-17 |
| 7 | = 1.8754602165033E-17 | 17 | = 4.5546890972223E-17 |
| 8.5 | = 2.2773445486111E-17 | 18.5 | = 4.9565734293301E-17 |
| 10 | = 2.679228880719E-17 | 20 | = 5.358457761438E-17 |
| troy pounds | femtograms |
|---|---|
| 1 | = 3.732417216 × 1017 |
| 2.679228880719 × 10-18 | = 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 …) |