c/k Carats - 1 metric carat = 2 × 10exp(–4) kg ce/el Number of cells ct/l Carrying capacity in tonnes g Gram gi F/S Gram of fissile isotopes kg H2O2 Kilogram of hydrogen peroxide kg K2O Kilogram of potassium oxide kg KOH Kilogram of potassium hydroxide (caustic potash) kg met.am. Kilogram of methylamines kg N Kilogram of nitrogen kg NaOH Kilogram of sodium hydroxide (caustic soda) kg/net eda Kilogram drained net weight kg P2O5 Kilogram of diphosphorus pentaoxide kg 90 pct sdt Kilogram of substance 90 % dry kg U Kilogram of uranium 1000 kWh Thousand kilowatt hours l Litre 1000 l Thousand litres l alc. 100 pct Litre pure (100 %) alcohol m Metre m2 Square metre m3 Cubic metre 1000 m3 Thousand cubic metres pa Number of pairs items Number of items 100 items Hundred items 1000 items Thousand items TJ Terajoule (gross calorific value)