diff --git a/src/main.cpp b/src/main.cpp
index 2f6295f..4f46215 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -18,7 +18,8 @@ CurrentTransformerCard ct5 = CurrentTransformerCard(&analogCard, 4, &voltage, &a
 CurrentTransformerCard ct6 = CurrentTransformerCard(&analogCard, 5, &voltage, &adc2current, CT_INTERVAL);
 float adc2current(uint16_t adc_val)
 {
-  return adc_val * 1.0;
+  float voltage = adc_val * 0.0007-0.1994;
+  return voltage;
 }
 
 #endif