diff --git a/physics/Einstein's_Energy-Mass_Equivalence.py b/physics/Einstein's_Energy-Mass_Equivalence.py
new file mode 100644
index 000000000000..f6f5e03c0140
--- /dev/null
+++ b/physics/Einstein's_Energy-Mass_Equivalence.py
@@ -0,0 +1,21 @@
+def energy_equivalent(mass_kg):
+    # Speed of light in meters per second
+    speed_of_light = 299792458
+
+    # Calculate energy using E=mc^2
+    energy_joules = mass_kg * speed_of_light**2
+
+    return energy_joules
+
+
+if __name__ == "__main__":
+    # Input mass in kilograms
+    mass_kg = float(input("Enter a mass in kilograms: "))
+
+    # Calculate energy equivalent
+    energy_joules = energy_equivalent(mass_kg)
+
+    # Display the result
+    print(
+        f"The energy equivalent of {mass_kg} kilograms is approximately {energy_joules} joules."
+    )