Blast Wave Pressure Calculator - Joules To Psi Calculator

TNT Mass:

Area (A):

Blast Wave Pressure (PSI): Blast Wave Pressure (Pa): Blast Wave Pressure (bar): Blast Wave Pressure (at): Blast Wave Pressure (atm): Blast Wave Pressure (Torr): Blast Wave Pressure (hPa): Blast Wave Pressure (kPa): Blast Wave Pressure (MPa): Blast Wave Pressure (inHg):

1. What is a Blast Wave Pressure Calculator?

Definition: This calculator computes the blast wave pressure (in PSI and other units) generated by an explosion of TNT, using the energy from TNT and the Joules to PSI conversion formula \( PSI = J / (A * 0.000145038) \), where \( J \) is the energy in Joules, \( A \) is the area in square meters, and 0.000145038 is the conversion factor from Pascal (Pa) to PSI.

Purpose: It helps engineers, scientists, and safety professionals analyze the pressure impact of explosions for applications like blast resistance design, military engineering, and disaster management.

2. How Does the Calculator Work?

Calculations are based on the following steps:

\[ PSI = \frac{J}{A * 0.000145038} \]

Where:

\( J \) is the energy in Joules, calculated from the TNT mass using the energy equivalent (e.g., 1 g TNT = 4.184×10³ J, 1 kg TNT = 4.184×10⁶ J, etc.).
\( A \) is the area in square meters over which the pressure is distributed.
0.000145038 is the conversion factor from Pascals (Pa) to PSI.

Unit Conversions:

Category	Unit	Conversion to SI Unit
Blast Wave Pressure	PSI (Pounds per square inch)	1 PSI = 6894.76 Pa
	Pa (Pascals)	1 Pa
	bar	1 bar = 100,000 Pa
	at (Technical atmospheres)	1 at = 98,066.5 Pa
	atm (Standard atmospheres)	1 atm = 101,325 Pa
	Torr	1 Torr = 133.322 Pa
	hPa (Hectopascals)	1 hPa = 100 Pa
	kPa (Kilopascals)	1 kPa = 1000 Pa
	MPa (Megapascals)	1 MPa = 1,000,000 Pa
	inHg (Inches of mercury)	1 inHg = 3386.39 Pa
TNT Mass	g (Grams)	1 g TNT = 4.184×10³ J
	kg (Kilograms)	1 kg TNT = 4.184×10⁶ J
	Mg (Megagrams)	1 Mg TNT = 4.184×10⁹ J
	Gg (Gigagrams)	1 Gg TNT = 4.184×10¹² J
	Tg (Teragrams)	1 Tg TNT = 4.184×10¹⁵ J
Area	m² (Square Meters)	1 m²
	cm² (Square Centimeters)	1 cm² = 0.0001 m²
	mm² (Square Millimeters)	1 mm² = 0.000001 m²
	km² (Square Kilometers)	1 km² = 1,000,000 m²
	in² (Square Inches)	1 in² = 0.00064516 m²
	ft² (Square Feet)	1 ft² = 0.092903 m²
	yd² (Square Yards)	1 yd² = 0.836127 m²

Explanation: TNT mass is converted to energy in Joules using the TNT energy equivalent, area is converted to square meters, and pressure is calculated in PSI, then converted to other units.

3. TNT Energy Equivalents

The following table provides the energy equivalents for TNT masses:

TNT Mass Unit	Energy (Joules)
1 g	4.184×10³
1 kg	4.184×10⁶
1 Mg	4.184×10⁹
1 Gg	4.184×10¹²
1 Tg	4.184×10¹⁵

Notes: These values are based on the standard energy release of TNT, where 1 gram of TNT releases 4.184 kJ of energy. The calculator uses this to estimate blast wave pressure over a given area.

4. Importance of Blast Wave Pressure Calculation

Details: Accurate blast wave pressure calculations are critical for assessing the destructive potential of explosions, designing blast-resistant structures, and ensuring safety in military, industrial, and urban planning applications.

5. Using the Calculator

Tips: Enter TNT Mass (g, kg, Mg, Gg, Tg) and Area (m², cm², mm², km², in², ft², yd²). Results include blast wave pressure in PSI and other units (Pa, bar, at, atm, Torr, hPa, kPa, MPa, inHg).

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