Moment magnitude to kilotons of TNT
Type a value in Mw to get it in kt instantly.
15.08kt
That's about the same as a strong quake. That energy could run a home for about 1,623 years.
What it means
How much energy is that?
Uses the standard relation log₁₀E = 1.5M + 4.8. Reported magnitudes vary slightly between agencies and methods.
The math
How to convert Mw to kt
Magnitude is logarithmic energy: log₁₀E = 1.5M + 4.8, so one whole magnitude is about 32 times the energy.
Example: 6 Mw = 15.0802 kt.
Every unit
Your earthquake in every unit
Tables
Mw to kt conversion table
| Mw | kt |
|---|---|
| 2 Mw | 1.508×10⁻⁵ kt |
| 3 Mw | 0.000476879 kt |
| 4 Mw | 0.0150802 kt |
| 4.5 Mw | 0.0848024 kt |
| 5 Mw | 0.476879 kt |
| 5.5 Mw | 2.68169 kt |
| 6 Mw | 15.0802 kt |
| 6.5 Mw | 84.8024 kt |
| 7 Mw | 476.879 kt |
| 7.5 Mw | 2,681.69 kt |
| 8 Mw | 15,080.2 kt |
| 9 Mw | 476,879 kt |
kt to Mw conversion table
| kt | Mw |
|---|---|
| 2 kt | 5.41508 Mw |
| 3 kt | 5.53248 Mw |
| 4 kt | 5.61577 Mw |
| 4.5 kt | 5.64987 Mw |
| 5 kt | 5.68037 Mw |
| 5.5 kt | 5.70797 Mw |
| 6 kt | 5.73316 Mw |
| 6.5 kt | 5.75634 Mw |
| 7 kt | 5.77779 Mw |
| 7.5 kt | 5.79777 Mw |
| 8 kt | 5.81645 Mw |
| 9 kt | 5.85056 Mw |
Quick answers
Quick answers
- How many kt is 1 Mw?
- 1 Mw is 4.769×10⁻⁷ kt.
- How many kt is 10 Mw?
- 10 Mw is 15,080,200 kt.
- How many kt is 6 Mw?
- 6 Mw is 15.0802 kt.
The units
About these units
Moment magnitude (Mw)
The modern magnitude scale, based on how much rock moved and how far.
Kilotons of TNT (kt)
A thousand tons of TNT, the scale of large quakes and nuclear weapons.
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