Several blast engineering firms have released free, non-ITAR spreadsheets based on the public Conwep equations. These require Microsoft Excel with macros enabled. Example search: "CONWEP excel sheet UFC 3-340-02".
For example, at a scaled distance of 1 m/kg^(1/3), Pr is approximately 1,500 psi. At 3 m/kg^(1/3), Pr drops to 200 psi. This non-linear decay is why accurate software is critical. Conwep Software Download
At 4:30 AM, he hit Enter on the final integration. Several blast engineering firms have released free, non-ITAR
: Distribution is generally limited to U.S. government agencies and their authorized contractors. Non-government entities may require a government sponsor to obtain the software. Avoid Third-Party Sites Pr is approximately 1