diff --git a/src/main/common/maths.h b/src/main/common/maths.h
index d872edc0a0..690ca7c0d9 100644
--- a/src/main/common/maths.h
+++ b/src/main/common/maths.h
@@ -68,6 +68,12 @@
 
 #define C_TO_KELVIN(temp) (temp + 273.15f)
 
+// Standard Sea Level values
+// Ref:https://en.wikipedia.org/wiki/Standard_sea_level
+#define SSL_AIR_DENSITY         1.225f // kg/m^3
+#define SSL_AIR_PRESSURE 101325.01576f // Pascal
+#define SSL_AIR_TEMPERATURE    288.15f // K
+
 // copied from https://code.google.com/p/cxutil/source/browse/include/cxutil/utility.h#70
 #define _CHOOSE2(binoper, lexpr, lvar, rexpr, rvar)         \
     ( __extension__ ({                                      \
diff --git a/src/main/drivers/pitotmeter/pitotmeter_adc.c b/src/main/drivers/pitotmeter/pitotmeter_adc.c
index da68570ca9..f9c24a4f30 100644
--- a/src/main/drivers/pitotmeter/pitotmeter_adc.c
+++ b/src/main/drivers/pitotmeter/pitotmeter_adc.c
@@ -59,7 +59,7 @@ static void adcPitotCalculate(pitotDev_t *pitot, float *pressure, float *tempera
     if (pressure)
         *pressure = (voltage * PITOT_ADC_VOLTAGE_SCALER - PITOT_ADC_VOLTAGE_ZERO) * PITOT_ADC_VOLTAGE_TO_PRESSURE;
     if (temperature)
-        *temperature = 288.15f;     // Temperature at standard sea level (288.15 K)
+        *temperature = SSL_AIR_TEMPERATURE; // Temperature at standard sea level
 }
 
 bool adcPitotDetect(pitotDev_t *pitot)
diff --git a/src/main/drivers/pitotmeter/pitotmeter_virtual.c b/src/main/drivers/pitotmeter/pitotmeter_virtual.c
index 3f72828517..b8af2df33a 100644
--- a/src/main/drivers/pitotmeter/pitotmeter_virtual.c
+++ b/src/main/drivers/pitotmeter/pitotmeter_virtual.c
@@ -74,10 +74,9 @@ static void virtualPitotCalculate(pitotDev_t *pitot, float *pressure, float *tem
         }
     }
     if (pressure)
-        //*pressure = sq(airSpeed / 100) * AIR_DENSITY_SEA_LEVEL_15C / 2 + P0;
-        *pressure = sq(airSpeed) * AIR_DENSITY_SEA_LEVEL_15C / 20000.0f + P0;
+        *pressure = sq(airSpeed) * SSL_AIR_DENSITY / 20000.0f + SSL_AIR_PRESSURE;
     if (temperature)
-        *temperature = 288.15f;     // Temperature at standard sea level (288.15 K)
+        *temperature = SSL_AIR_TEMPERATURE; // Temperature at standard sea level
 }
 
 bool virtualPitotDetect(pitotDev_t *pitot)
diff --git a/src/main/sensors/pitotmeter.c b/src/main/sensors/pitotmeter.c
index 332f98e02e..c50449c59a 100644
--- a/src/main/sensors/pitotmeter.c
+++ b/src/main/sensors/pitotmeter.c
@@ -167,7 +167,7 @@ bool pitotIsCalibrationComplete(void)
 
 void pitotStartCalibration(void)
 {
-    zeroCalibrationStartS(&pitot.zeroCalibration, CALIBRATING_PITOT_TIME_MS, P0 * 0.00001f, false);
+    zeroCalibrationStartS(&pitot.zeroCalibration, CALIBRATING_PITOT_TIME_MS, SSL_AIR_PRESSURE * 0.00001f, false);
 }
 
 static void performPitotCalibrationCycle(void)
@@ -223,7 +223,7 @@ STATIC_PROTOTHREAD(pitotThread)
             //
             // Therefore we shouldn't care about CAS/TAS and only calculate IAS since it's more indicative to the pilot and more useful in calculations
             // It also allows us to use pitot_scale to calibrate the dynamic pressure sensor scale
-            pitot.airSpeed = pitotmeterConfig()->pitot_scale * fast_fsqrtf(2.0f * fabsf(pitot.pressure - pitot.pressureZero) / AIR_DENSITY_SEA_LEVEL_15C) * 100;
+            pitot.airSpeed = pitotmeterConfig()->pitot_scale * fast_fsqrtf(2.0f * fabsf(pitot.pressure - pitot.pressureZero) / SSL_AIR_DENSITY) * 100;
         } else {
             performPitotCalibrationCycle();
             pitot.airSpeed = 0;
diff --git a/src/main/sensors/pitotmeter.h b/src/main/sensors/pitotmeter.h
index b7fd3c4ca7..fffc5a9f1b 100644
--- a/src/main/sensors/pitotmeter.h
+++ b/src/main/sensors/pitotmeter.h
@@ -59,9 +59,6 @@ typedef struct pito_s {
 
 #ifdef USE_PITOT
 
-#define AIR_DENSITY_SEA_LEVEL_15C   1.225f      // Air density at sea level and 15 degrees Celsius
-#define P0                          101325.0f   // standard pressure [Pa]
-
 extern pitot_t pitot;
 
 bool pitotInit(void);