Conventional Explosives
Effects Calculator

Originally Written by Mike Wong as a Nuke Calculator: 2003-04-24
Revised/Expanded by Ryan Crierie: 26 November 2017

This page will calculate blast effects for conventional explosives of arbitrary weights, based on the scaling laws printed in Carey Sublette's well-known Nuclear Weapons FAQ, with a few additions from the Effects of Nuclear Weapons and curves found via Curve Expert.

One pound of TNT equivalence is approximately 0.00000045359237 kilotons for the purposes of these calculations, since the code this webpage uses was originally for nuclear weapons effects.

The terms "Maximum Radius for Total Demolition" and "Maximum Radius for Visible Damage" are from the World War II Royal Air Force; and it was how they evaluated the effects of aerial bombs.

Bomb Type

Charge Wt (lbs)

Explosive Charge

Charge TNT Equivalence

Charge TNT
Equiv. Wt. (lbs)

50 lb GP (British WWII)

12.5

TNT

1

12.5

120 lb GP (British WWII)

30

TNT

1

30

250 lb GP (British WWII)

72.5

TNT

1

72.5

500 lb MC (British WWII)

140

TNT

1

140

1000 lb MC (British WWII)

330

Amatol

0.91

300.3

2000 lb HC (British WWII)

1400

Amatol

0.91

1274

4000 lb HC (British WWII)

3040

Amatol

0.91

2766.4

8000 lb HC (British WWII)

5440

Amatol

0.91

4950.4

12000 lb HC (British WWII)

9600

Amatol

0.91

8736

12,000 lb MC (British Tallboy)

5200

Torpex

1.3

6760

22,000 lb MC (British Grand Slam)

9136

Torpex

1.3

11876.8

250 lb LD-GP Mk 81

96

Tritonal

1.18

113.28

500 lb LD-GP Mk 82

192

Tritonal

1.18

226.56

1000 lb LD-GP Mk 83

445

Tritonal

1.18

525.1

2000 lb LD-GP Mk 84

945

Tritonal

1.18

1115.1

21,600 lb GBU-43/B MOAB

18,700

Composition H-6

1.176

22,000

Charge Weight Equivalence (pounds)

Overpressure

5,000 PSI Radius
2,000 PSI Radius
1,000 PSI Radius
500 PSI Radius
300 PSI Radius
200 PSI Radius
100 PSI Radius
50 PSI Radius
20 PSI Radius
15 PSI Radius
10 PSI Radius
5 PSI Radius
3 PSI Radius
2 PSI Radius
1 PSI Radius

Miscellaneous

Max. Radius for Total Demolition
Max. Radius for Visible Damage

Overpressure: