Liftoff Calculator Python

#Liftoff Calculator v1.0.


print("Gregrox's Liftoff Calculator v1.0. New Year's Day Edition.")
print("Thanks to Nyrath and his Atomic Rockets website.")

Mass = float(input("Mass of the planet in Earth masses: ")) * 5.9721986e24
Radius = float(input("Radius of the planet in kilometers: ")) * 1000
Atmosphere = float(input("Atmospheric Pressure in atmospheres: "))
AtmosphereHeight = float(input("Atmosphere Height in kilometers (Earth = 100): ")) * 1000
AtmosphericDensity = float(input("Atmospheric Density Multiplier (default = 1): "))
Acceleration = float(input("Acceleration of spacecraft in Gees: ")) * 9.81

BigG = 6.673e-11

DeltaV_Liftoff = ((BigG * Mass) / (Radius))**0.5

Gravity = ((Mass/5.9721986e24) / ((Radius/6371000)**2))

Liftoff_Duration = DeltaV_Liftoff / Acceleration

DeltaV_GravityDrag = Gravity * Liftoff_Duration

DeltaV_AtmosphereDrag = 700 * Atmosphere * AtmosphericDensity * (AtmosphereHeight/100000)

DeltaV_Total = DeltaV_Liftoff + DeltaV_GravityDrag + DeltaV_AtmosphereDrag

print("Delta V to orbit is approximately ",round(DeltaV_Total,4),"m/s")

DontStopCommandLine = input(".")