diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index c1c3c37c91..75745ff57e 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -339,6 +339,25 @@ RC_Channel::norm_input()
         return _reverse * (float)(radio_in - radio_trim) / (float)(radio_max  - radio_trim);
 }
 
+/*
+  get percentage input from 0 to 100. This ignores the trim value.
+ */
+uint8_t
+RC_Channel::percent_input()
+{
+    if (radio_in <= radio_min) {
+        return _reverse==-1?100:0;
+    }
+    if (radio_in >= radio_max) {
+        return _reverse==-1?0:100;
+    }
+    uint8_t ret = 100.0f * (radio_in - radio_min) / (float)(radio_max - radio_min);
+    if (_reverse == -1) {
+        ret = 100 - ret;
+    }
+    return ret;
+}
+
 float
 RC_Channel::norm_output()
 {
diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index cd76e91a51..a5caf7b8ed 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -89,6 +89,7 @@ public:
     int16_t                                         pwm_to_angle_dz(uint16_t dead_zone);
     int16_t                                         pwm_to_angle();
     float                                           norm_input();
+    uint8_t                                         percent_input();
     float                                           norm_output();
     int16_t                                         angle_to_pwm();
     int16_t                                         pwm_to_range();