diff --git a/main.c b/main.c
index 97331a0..1f24998 100644
--- a/main.c
+++ b/main.c
@@ -88,6 +88,7 @@ void nmea_sentence_process(const char *nmea_sentence)
 {
     uint8_t i = 0;
     uint8_t field_number = 0;
+    float speed_knots = 0.0;
     float speed_kmh = 0.0;
     uint8_t field_index = 0;
 
@@ -100,7 +101,9 @@ void nmea_sentence_process(const char *nmea_sentence)
        if (nmea_sentence[i] == ',')
        {
           if (field_number == 7) // Speed in knots (field 7)
-          {  speed_kmh = atof(nmea_sentence + i - field_index);
+          {
+          speed_knots = atof(nmea_sentence + i - field_index);
+             speed_kmh = speed_knots * 1.852;
              control_leds_based_on_speed(speed_kmh);
           }
              field_number++;
@@ -124,7 +127,9 @@ void nmea_sentence_process(const char *nmea_sentence)
        {
        if (field_number == 6)
            {
-              speed_kmh = atof(nmea_sentence + i - field_index);
+           speed_knots = atof(nmea_sentence + i - field_index);
+           speed_kmh = speed_knots * 1.852;
+
               control_leds_based_on_speed(speed_kmh);
            }
               field_number++;