diff --git a/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp b/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
index 68581aeafd..01a2c4ebcc 100644
--- a/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
+++ b/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
@@ -1655,9 +1655,9 @@ void RTS::handleData() {
 
     case AutolevelVal: {
       uint8_t meshPoint = (recdat.addr - AutolevelVal) / 2,
-              yPnt = floor(meshPoint / GRID_MAX_POINTS_X),
-              xPnt = meshPoint - (yPnt * GRID_MAX_POINTS_X);
-      if (yPnt % 2 != 0) xPnt = (GRID_MAX_POINTS_X - 1) - xPnt; // zag row
+              yPnt = meshPoint / (GRID_MAX_POINTS_X),
+              xPnt = meshPoint - yPnt * (GRID_MAX_POINTS_X);
+      if (yPnt % 2 != 0) xPnt = (GRID_MAX_POINTS_X) - 1 - xPnt; // zag row
 
       float meshVal = float(recdat.data[0] - (recdat.data[0] >= 32768 ? 65536 : 0)) / 1000;
 
diff --git a/Marlin/src/module/ft_motion.cpp b/Marlin/src/module/ft_motion.cpp
index ba1361f922..447f372e63 100644
--- a/Marlin/src/module/ft_motion.cpp
+++ b/Marlin/src/module/ft_motion.cpp
@@ -544,9 +544,9 @@ void FTMotion::loadBlockData(block_t * const current_block) {
   const float T1 = (F_n - f_s) * oneOverAccel,
               T3 = (F_n - f_e) * oneOverAccel;
 
-  N1 = ceil(T1 * (FTM_FS));         // Accel datapoints based on Hz frequency
-  N2 = ceil(T2 * (FTM_FS));         // Coast
-  N3 = ceil(T3 * (FTM_FS));         // Decel
+  N1 = CEIL(T1 * (FTM_FS));         // Accel datapoints based on Hz frequency
+  N2 = CEIL(T2 * (FTM_FS));         // Coast
+  N3 = CEIL(T3 * (FTM_FS));         // Decel
 
   const float T1_P = N1 * (FTM_TS), // (s) Accel datapoints x timestep resolution
               T2_P = N2 * (FTM_TS), // (s) Coast
diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
index 9c1668619b..552b7cb34a 100644
--- a/Marlin/src/module/stepper.cpp
+++ b/Marlin/src/module/stepper.cpp
@@ -3161,7 +3161,7 @@ void Stepper::init() {
       factor2 += -7.58095488 * zeta2;
       const float zeta3 = zeta2 * zeta;
       factor2 += 43.073216 * zeta3;
-      factor2 = floor(factor2);
+      factor2 = FLOOR(factor2);
     }
 
     const bool was_on = hal.isr_state();