# Conversion of units

Symbol Name of unit Conversion into kilograms
oz.tr. Troy ounce 1 oz.tr. = 0.0311034768 kg 1 kg ≈ 32.15075 oz.tr.
lb Pound 1 lb = 0.45359237 kg 1 kg ≈ 2.20462 lb
FL Flask 1 FL = 76 lb = 34.47302012 kg 1 kg ≈ 0.02901 FL
 FL: Usual trade size for mercury

## Conversion of gas volumes

Gas scf nm³ Litres (liquid)
Hydrogen 1 scf = 0.002623 kg 1 nm³ = 0.08988 kg 1 L = 0.07078 kg
Helium 1 scf = 0.00469 kg 1 nm³ = 0.1785 kg 1 L = 0.1249 kg
Nitrogen 1 scf = 0.03286 kg 1 nm³ = 1.2506 kg 1 L = 0.8083 kg
Oxygen 1 scf = 0.03756 kg 1 nm³ = 1.4291 kg 1 L = 1.1417 kg
Neon 1 scf = 0.02366 kg 1 nm³ = 0.8999 kg 1 L = 1.207 kg
Argon 1 scf = 0.0469 kg 1 nm³ = 1.784 kg 1 L = 1.3936 kg
Krypton 1 scf = 0.09582 kg 1 nm³ = 3.749 kg 1 L = 2.412 kg
Xenon 1 scf = 0.15495 kg 1 nm³ = 5.897 kg 1 L = 3.056 kg
 scf: Standard cubic foot, measured at 1013.25 hPa (1.0 atm) and 70 °F (≈21 °C) nm³: Normal cubic meter, measured at 1013.25 hPa (1.0 atm) and 0 °C (32 °F) Litres: Measured at 1013.25 hPa (1.0 atm) and boiling temperature 