Instant · Precise · Universal
34 units available
6 categories total
To convert Pg to tonnes: multiply by 10⁹. To convert Pg to Tg: multiply by 1,000.
1 Pg = 10¹⁵ g = 10¹² kg = 10⁹ tonnes = 1 gigatonne.
For example, 1 Petagram (Pg) = 984206527.6 Long Ton (UK) (ton (UK)).
| Petagram (Pg) | Long Ton (UK) (ton (UK)) |
|---|---|
| 0.1 | 98420652.76 |
| 0.5 | 492103263.8 |
| 1 | 984206527.6 |
| 2 | 1968413055 |
| 5 | 4921032638 |
| 10 | 9842065276 |
| 25 | 24605163190 |
| 50 | 49210326380 |
| 100 | 98420652760 |
| 500 | 492103263800 |
| 1000 | 984206527600 |
The petagram equals 10¹⁵ grams or one billion tonnes (one gigatonne).
1 Pg = 10¹⁵ g = 10¹² kg = 10⁹ tonnes = 1 gigatonne.
To convert Pg to tonnes: multiply by 10⁹. To convert Pg to Tg: multiply by 1,000.
Global carbon budgets: about 10 Pg of carbon are emitted annually from fossil fuels.
The total mass of all life on Earth is estimated at about 550 Pg of carbon.
Confusing Pg (petagram = 10¹⁵ g) with PB (petabyte). In mass contexts, P = peta = 10¹⁵.
1 Pg C = 1 gigatonne of carbon. Annual human CO₂ emissions are about 10 Pg C — a key climate figure.
The long ton (imperial ton) is a unit of mass equal to 2,240 pounds or approximately 1,016 kilograms.
1 long ton = 2,240 lb = 1,016.047 kg = 1.016 metric tonnes = 1.12 short tons.
To convert long tons to kg: multiply by 1,016.047. To convert long tons to short tons: multiply by 1.12.
Ship displacement tonnage (historical, some naval vessels still use it), and some UK agricultural contexts.
Naval ship displacement is traditionally given in long tons. HMS Titanic displaced about 52,310 long tons.
Assuming a 'ton' is a 'ton' — the long ton is 12% heavier than a short ton and 1.6% heavier than a metric tonne.
Easy memory: Long ton = British = 2,240 lb (long = larger). Short ton = US = 2,000 lb (short = smaller).



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