- #ifndef conversion_h
- #define conversion_h
-
-
- /* pressure units */
- enum
- {
- ATM,
- PSI,
- BAR,
- KPA
- };
-
- /* Transform calories to joules */
- #define CAL_TO_JOULE 4.1868
-
- /* Transform pound/(cubic inch) to gram/(cubic centimeter) */
- #define LBS_IN3_TO_G_CM3 27.679905
-
- /* Transform different pressure units */
-
- #define ATM_TO_PA 101325.0
- #define ATM_TO_PSI 14.695949
- #define ATM_TO_BAR 1.01325
-
- #define BAR_TO_PSI 14.503774
-
- #define BAR_TO_ATM 0.98692327
- #define PSI_TO_ATM 0.068045964
- #define KPA_TO_ATM 0.0098692327
-
- /* Length */
-
- #define M_TO_CM 100.0
- #define M_TO_IN 39.370079
-
- #define IN_TO_M 0.0254
-
- /* Surface */
-
- #define M2_TO_CM2 10000.0
- #define M2_TO_IN2 1550.0031
-
- /* Volume */
-
- #define M3_TO_CM3 1000000.0
- #define M3_TO_IN3 61023.744
-
- /* Mass flow */
-
- #define KG_S_TO_LB_S 2.2046226
-
-
- /* force */
-
- /* newton to pound-force */
- #define N_TO_LBF 0.22480894
- #define LBF_TO_N 4.4482216
-
- #endif
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