diff --git a/period/cycles.py b/period/cycles.py
index 6db2ce0..9ec1bf2 100644
--- a/period/cycles.py
+++ b/period/cycles.py
@@ -17,7 +17,7 @@ def index():
     db = get_db()
     current_cycle = db.execute('SELECT * from cycle ORDER BY id DESC LIMIT 1').fetchone()
     start_time = pendulum.parse(current_cycle['start_time'])
-    cycle_length = ((pendulum.now() - start_time ).days)+1
+    cycle_length = (pendulum.now() - start_time ).days
 
     db.execute(
         'UPDATE cycle SET cycle_length = ?'