Convert Watt-Hours to Kilotons of TNT
Convert Watt-Hours (Wh) to Kilotons of TNT (kt(TNT)) instantly and accurately.
Conversion Formula
kt(TNT) = Wh × 8.604206501e-10
About Watt-Hours
A watt-hour (Wh) is the energy delivered by 1 watt for one hour - exactly 3,600 J. It is the practical unit for small-scale electrical energy: a 10,000 mAh 5 V power bank stores 50 Wh; a laptop battery holds 50-90 Wh; a smartphone battery holds 10-15 Wh; an AA alkaline cell stores ~3 Wh. LED lamps labelled 9 W save 51 Wh/h over a 60 W incandescent. IATA dangerous-goods rules use Wh as the threshold for lithium batteries in aircraft: cells >20 Wh and batteries >100 Wh need special approval. 1 Wh = 3,600 J = 3.412 BTU.
About Kilotons of TNT
A kiloton of TNT (kt(TNT)) = 10³ tons of TNT = exactly 4.184 TJ. It is the standard unit for sub-megaton nuclear weapon yields. Hiroshima's Little Boy: ~12-18 kt; Nagasaki's Fat Man: ~19-23 kt. The W88 warhead (Trident II) is ~475 kt; the W76 is ~100 kt. The Beirut port explosion (2020): estimated 0.5-1.1 kt. A magnitude 5.0 earthquake releases ~0.5-2 kt of seismic energy. A kiloton blast creates a fireball ~90-100 m radius and a lethal thermal radius of ~1-2 km. 1 kt(TNT) = 4.184 TJ = 1,162.8 MWh.
Quick Reference Table
| Watt-Hours (Wh) | Kilotons of TNT (kt(TNT)) |
|---|---|
| 1 Wh | 8.604 × 10-10 kt(TNT) |
| 2 Wh | 1.721 × 10-9 kt(TNT) |
| 5 Wh | 4.302 × 10-9 kt(TNT) |
| 10 Wh | 8.604 × 10-9 kt(TNT) |
| 25 Wh | 2.151 × 10-8 kt(TNT) |
| 50 Wh | 4.302 × 10-8 kt(TNT) |
| 100 Wh | 8.604 × 10-8 kt(TNT) |