diff --git a/common/constants.py b/common/constants.py
index 1653076be..55c23f759 100644
--- a/common/constants.py
+++ b/common/constants.py
@@ -20,6 +20,10 @@ class CV:
   LB_TO_KG = 0.453592
 
   # FrogPilot variables
+  METER_TO_FOOT = 3.28084
+  FOOT_TO_METER = 1. / METER_TO_FOOT
+  CM_TO_INCH = 1. / 2.54
+  INCH_TO_CM = 1. / CM_TO_INCH
 
 
 ACCELERATION_DUE_TO_GRAVITY = 9.81  # m/s^2
diff --git a/common/util.h b/common/util.h
index 7bccadb8b..dfb12009a 100644
--- a/common/util.h
+++ b/common/util.h
@@ -38,6 +38,9 @@ const double METER_TO_MILE = KM_TO_MILE / 1000.0;
 const double METER_TO_FOOT = 3.28084;
 
 // FrogPilot variables
+const double FOOT_TO_METER = 1. / METER_TO_FOOT;
+const double CM_TO_INCH = 1. / 2.54;
+const double INCH_TO_CM = 1. / CM_TO_INCH;
 
 #define ALIGNED_SIZE(x, align) (((x) + (align)-1) & ~((align)-1))