Convert Therms to Megatons of TNT
Convert Therms (thm) to Megatons of TNT (Mt(TNT)) instantly and accurately.
Conversion Formula
Mt(TNT) = thm × 2.521644007e-8
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 Megatons of TNT
A megaton of TNT (Mt(TNT)) = 10⁶ tons of TNT = exactly 4.184 PJ. The Soviet Tsar Bomba (1961) yielded ~50 Mt - the largest human-made explosion ever, with a fireball 8 km in diameter. Castle Bravo (1954) yielded ~15 Mt, 2.5× its 6 Mt design yield. Modern thermonuclear warheads typically range from 0.1-1.2 Mt. The 2011 Tōhoku earthquake released ~500 Mt in seismic energy. The Krakatoa 1883 eruption released ~200 Mt; Tambora 1815 ~33,000 Mt. 1 Mt(TNT) = 4.184 PJ = 1,162,800 MWh.
Quick Reference Table
| Therms (thm) | Megatons of TNT (Mt(TNT)) |
|---|---|
| 1 thm | 2.522 × 10-8 Mt(TNT) |
| 2 thm | 5.043 × 10-8 Mt(TNT) |
| 5 thm | 1.261 × 10-7 Mt(TNT) |
| 10 thm | 2.522 × 10-7 Mt(TNT) |
| 25 thm | 6.304 × 10-7 Mt(TNT) |
| 50 thm | 1.261 × 10-6 Mt(TNT) |
| 100 thm | 2.522 × 10-6 Mt(TNT) |