Convert Therms to Petajoules
Convert Therms (thm) to Petajoules (PJ) instantly and accurately.
Conversion Formula
PJ = thm × 1.055055853e-7
About Therms
A therm is the US natural gas billing unit equal to exactly 100,000 BTU = 105,505,585.262 J ≈ 105.5 MJ. One CCF of average US pipeline gas contains ~1.02 therms. The EIA publishes residential gas prices in $/therm; spot prices at Henry Hub are in $/MMBTU (1 MMBTU = 10 therms). US households average 500-700 therms/year for space heating, water heating, and cooking. A 15 kW domestic boiler running 2 hours delivers ~1 therm of useful heat. 1 therm = 100,000 BTU = 105.506 MJ = 29.307 kWh = 25,200 kcal.
About Petajoules
A petajoule (PJ) is 10¹⁵ J - the national energy policy scale. IEA reports primary energy in PJ/year: Sweden ~600 PJ; Germany ~12,500 PJ; the United States ~93,000 PJ. World total primary energy supply is ~605,000 PJ = 605 EJ. The 1883 Krakatoa eruption released ~200 PJ ≈ 48 megatons TNT. A 1-megaton nuclear weapon releases 4.184 PJ. Global annual steel production embeds ~38,000-47,000 PJ of energy. 1 PJ = 10¹⁵ J = 277.78 GWh = 238.85 ktoe = 23.88 ktoe.
Quick Reference Table
| Therms (thm) | Petajoules (PJ) |
|---|---|
| 1 thm | 1.055 × 10-7 PJ |
| 2 thm | 2.11 × 10-7 PJ |
| 5 thm | 5.275 × 10-7 PJ |
| 10 thm | 1.055 × 10-6 PJ |
| 25 thm | 2.638 × 10-6 PJ |
| 50 thm | 5.275 × 10-6 PJ |
| 100 thm | 1.055 × 10-5 PJ |