1 gram (g) = 1,000 milligrams (mg)
==> Set mgPerGram = 1,000

1 carat (ct) = 200 mg
= 200 / mgPerGram g = 0.2 g
==> Set gramsPerCarat = 0.2

1 kilogram (kg) = 1,000 g
= gramsPerKg * mgPerGram g
= 1,000,000 mg
==> Set gramsPerKg = 1,000

1 tonne (t) = 1,000 kg
= kgPerTonne * gramsPerKg g
= 1,000,000 g
= kgPerTonne * gramsPerKg * mgPerGram mg
= 1,000,000,000 mg
==> Set kgPerTonne = 1,000

1 megatonne (Mt) = 1,000,000 t
= 1,000,000 * kgPerTonne kg
= 1,000,000,000 kg

Для пользователей в США.

1 pound (lb) = 7000 grains (gr)
==> Set grainsPerPound = 7000

1 pound (lb) = 16 ounces (oz)
==> Set ouncesPerPound = 16

48 ounces (oz) = 875 pennyweights (dwt)
==> Set dwtPerOunce = 875 / 48

1 short ton (sh tn) (US) = 2000 lb
 = poundsPerShortTon / poundsPerLongTon l tn
= 1 / 1.12 l tn
==> Set poundsPerShortTon = 2,000

1 long ton (l tn) (UK) = 2240 lb
= poundsPerLongTon / poundsPerShortTon sh tn
= 1.12 sh tn
==> Set poundsPerLongTon = 2,240

Короткая тонна была сокращена до sh tn, а не до st (как в книге Hustrulid и Kuchta «Open Pit Mine Planing and Design»), чтобы исключить потенциальную путаницу с камнем (14 фунтов). Ссылка на issue JIRA MM-30981.

Тройская масса

Тройская унция (используется для драгоценных металлов):

1 troy ounce (oz t) = 480 grains (gr)
==> Set grainsPerTroyOunce = 480

1 troy pound (lb t) = 5760 grains (gr)
==> Set grainsPerTroyPound = 5760

1 troy pound (1b t) = 12 troy ounces (oz t)
==> Set troyOuncesPerTroyPound = 12

1 troy ounce (oz t) = 20 pennyweights (dwt)
==> Set dwtPerTroyOunce = 20

1 troy ounce (oz t) = 31.1034768 grams (g)
==> Set gramsPerTroyOunce = 31.1034768

1 g
= 1 / gramsPerDwt dwt
= 1 / 1.55517384 dwt
= ouncesPerPound / ( gramsPerKg * kgPerPound ) oz
= 16 / 453.59237 oz
= 1 / ( gramsPerKg * kgPerPound ) lb
= 1 / 453.59237 lb

1 kg
= gramsPerKg / gramsPerDwt dwt
= 1,000 / 1.55517384 dwt
= ouncesPerPound / kgPerPound oz
= 16 / 0.45359237 oz
= 1 / kgPerPound lb
= 1 / 0.45359237 lb
= 1 / ( poundsPerShortTon * kgPerPound ) sh tn
= 1 / 907.18474 sh tn
= 1 / ( poundsPerLongTon * kgPerPound ) l tn
= 1 / ( poundsPerLongTon / poundsPerShortTon * poundsPerShortTon * kgPerPound ) l tn
= 1 / (1.12 * 907.18474) l tn

1 t
= kgPerTonne * gramsPerKg / gramsPerDwt dwt
= 1,000,000 / 1.55517384 dwt
= kgPerTonne * ouncesPerPound / kgPerPound oz
= 16,000 / 0.45359237 oz
= kgPerTonne / kgPerPound lb
= 1,000 / 0.45359237 lb
= kgPerTonne / ( poundsPerShortTon * kgPerPound ) sh tn
= 1,000 / 907.18474 sh tn
= kgPerTonne / ( poundsPerLongTon * kgPerPound ) l tn
= kgPerTonne / ( poundsPerLongTon / poundsPerShortTon * poundsPerShortTon * kgPerPound ) l tn
= 1,000 / 1016.0469088 l tn