diff --git a/calculator/calculator.py b/calculator/calculator.py
new file mode 100644
index 0000000..3cc844a
--- /dev/null
+++ b/calculator/calculator.py
@@ -0,0 +1,63 @@
+# 두 지점의 위경도로 두 지점 사이 거리 구하는 함수
+#코드 출처: https://ko.martech.zone/calculate-great-circle-distance/
+from numpy import sin, cos, arccos, pi, round
+import pandas as pd
+import numpy as np
+def rad2deg(radians):
+    degrees = radians * 180 / pi
+    return degrees
+
+def deg2rad(degrees):
+    radians = degrees * pi / 180
+    return radians
+
+def getDistanceBetweenPointsNew(latitude1, longitude1, latitude2, longitude2, unit = 'kilometers'):
+    
+    theta = longitude1 - longitude2
+    
+    distance = 60 * 1.1515 * rad2deg(
+        arccos(
+            (sin(deg2rad(latitude1)) * sin(deg2rad(latitude2))) + 
+            (cos(deg2rad(latitude1)) * cos(deg2rad(latitude2)) * cos(deg2rad(theta)))
+        )
+    )
+    
+    if unit == 'miles':
+        return round(distance, 2)
+    if unit == 'kilometers':
+        return round(distance * 1.609344, 2)
+
+
+# 비상벨, 유흥업소, 경찰관서, 안심이cctv, 여성 안심 택배함, 여성 안심지킴이집
+
+# 비상벨
+df_bell = pd.read_csv('EDA/dataset/emergency_bell/12_04_09_E_안전비상벨위치정보.csv')
+
+def calculate_dist_from_bell(latitude, longitude):
+
+    df_dist = pd.DataFrame(
+        columns = ['bells_road_addr','bells_addr', 'distance']
+    )
+
+    df_bell = pd.read_csv('EDA/dataset/emergency_bell/12_04_09_E_안전비상벨위치정보.csv')
+
+    for ind in df_bell.index:
+        #print(df_bell['WGS84위도'][ind],df_bell['WGS84경도'][ind])
+
+        dist = getDistanceBetweenPointsNew(latitude, longitude, df_bell['WGS84위도'][ind], df_bell['WGS84경도'][ind])
+        row = {
+            df_bell['소재지도로명주소'][ind],
+            df_bell['소재지지번주소'][ind],
+            dist
+        }
+
+        df_dist = df_dist.append(row, ignore_index = True)
+
+def rate_with_bells(df_bell):
+    dist = df_bell['distance']
+    for d in dist:
+        if d < 1:
+            return True   #반경 1km 이내 안심벨 있음.
+        else:
+            return False  #반경 1km 이내 안심벨 없음.
+