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Tons to lbs conversion chart8/25/2023 ![]() For TNT this has been accurately measured as 4,686 J/g from a large sample of air blast experiments, and theoretically calculated to be 4,853 J/g. Where for example the comparison is by energy yield, an explosive's energy is normally expressed for chemical purposes as the thermodynamic work produced by its detonation. Historical derivation of the value Īlternative values for TNT equivalency can be calculated according to which property is being compared and when in the two detonation processes the values are measured. The TNT equivalent appears in various nuclear weapon control treaties, and has been used to characterize the energy released in asteroid impacts. The kiloton and megaton of TNT equivalent have traditionally been used to describe the energy output, and hence the destructive power, of a nuclear weapon. The " megaton (of TNT equivalent)" is a unit of energy equal to 4.184 petajoules ( 4.184 ×10 15 J). The " kiloton (of TNT equivalent)" is a unit of energy equal to 4.184 terajoules ( 4.184 ×10 12 J). This convention intends to compare the destructiveness of an event with that of conventional explosive materials, of which TNT is a typical example, although other conventional explosives such as dynamite contain more energy. In other words, for each gram of TNT exploded, 4.184 kilojoules (or 4,184 joules) of energy are released. The ton of TNT is a unit of energy defined by that convention to be 4.184 gigajoules ( 1 gigacalorie), which is the approximate energy released in the detonation of a metric ton (1,000 kilograms) of TNT. TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion. So, to convert directly from bar to pounds per square inch, you multiply by 14.503774.The explosion from a 14-kiloton nuclear test at the Nevada Test Site, in 1951 Or, you can find the single factor you need by dividing the A factor by the B factor.įor example, to convert from bar to pounds per square inch you would multiply by 100000 then divide by 6894.757. To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into Pascals then divide by the factor for B to convert out of Pascals. To convert from Pa into units in the left columnĭivide by the value in the right column or, multiply by the reciprocal, 1/x.ĥ00000 Pa / 100000 = 5 bar Multiply by the conversion value in the right column in the table below.ĥ bar * 100000 = 500000 Pa To simply convert from any unit into pascals, for example, from 5 bar, just Where S is our starting value, C is our conversion factor, and How to Convert Units of PressureĬonversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem: Some are obvious, such as pounds per square inch, but even the SI standard Pascal is actually an expression of one Newton per square meter. Since pressure is derived from force and area, many units for pressure directly relate force to area. ![]() Where P is equal to pressure, F is the normal force and A is area. Pressure is a scalar quality reflecting how force acts on a surface.
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