diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index e625f35f..da70a65a 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -8270,7 +8270,7 @@ exports.compareMeasuredHeight = async (req, reply) => {
     const { tankName, measuredHeight, tankHeight } = req.body;
 
     if (!tankName || typeof measuredHeight !== 'number' || typeof tankHeight !== 'number') {
-      return reply.status(400).send({ message: "tankName, tankHeight and measuredHeight (all required, as integers)." });
+      return reply.status(400).send({ message: "tankName, tankHeight and measuredHeight are required and must be numbers." });
     }
 
     if (tankHeight <= 0 || measuredHeight < 0) {
@@ -8287,7 +8287,14 @@ exports.compareMeasuredHeight = async (req, reply) => {
       return reply.status(400).send({ message: "Invalid waterCapacityPerCm in tank data." });
     }
 
-    // 🔹 Sensor data
+    // DB tank height (in feet → cm)
+    const tankHeightFeetFromDB = parseFloat(tank.height);
+    const tankHeightInCmFromDB = Math.round(tankHeightFeetFromDB * 30.48);
+
+    // tankHeight from body is already in cm
+    const tankHeightInCmFromBody = Math.round(tankHeight);
+
+    // 🔹 Sensor data (use DB tank height)
     let sensorGapCm = null;
     let sensorWaterLevelInCm = null;
     let sensorWaterLevelLiters = null;
@@ -8302,17 +8309,17 @@ exports.compareMeasuredHeight = async (req, reply) => {
         t => t.tankhardwareId === tank.tankhardwareId
       );
       if (matchingTank) {
-        const tankHeightFromSensor = parseInt(matchingTank.tankHeight, 10);
+        const tankHeightFromSensor = parseFloat(matchingTank.tankHeight);
         if (!isNaN(tankHeightFromSensor) && tankHeightFromSensor >= 0) {
-          sensorGapCm = tankHeightFromSensor;
-          sensorWaterLevelInCm = Math.max(0, tankHeight - sensorGapCm);
+          sensorGapCm = Math.round(tankHeightFromSensor);
+          sensorWaterLevelInCm = Math.max(0, tankHeightInCmFromDB - sensorGapCm);
           sensorWaterLevelLiters = Math.round(sensorWaterLevelInCm * capacityPerCm);
         }
       }
     }
 
-    // 🔹 Manual data
-    const manualWaterLevelInCm = measuredHeight;
+    // 🔹 Manual data (use tankHeight from body)
+    const manualWaterLevelInCm = Math.round(measuredHeight);  // measuredHeight in cm
     const manualWaterLevelLiters = Math.round(manualWaterLevelInCm * capacityPerCm);
 
     // 🔹 Comparison
@@ -8325,18 +8332,16 @@ exports.compareMeasuredHeight = async (req, reply) => {
       status_code: 200,
       data: {
         tankName,
-        tankHeightInCm: tankHeight,
         capacity: tank.capacity,
         sensor: {
-          tankHeightInCm: tankHeight,
-          sensorGapCm: sensorGapCm ?? null,
-          waterLevelInCm: sensorWaterLevelInCm ?? null,
-          waterLevelLiters: sensorWaterLevelLiters ?? null
+          tankHeightInCm: tankHeightInCmFromDB,     // from DB
+          sensorGapCm,
+          waterLevelInCm: sensorWaterLevelInCm,
+          waterLevelLiters: sensorWaterLevelLiters
         },
         manual: {
-          tankHeightInCm: tankHeight,
-          //measuredHeightCm: measuredHeight,
-          waterLevelInCm: manualWaterLevelInCm,
+          tankHeightInCm: tankHeightInCmFromBody,   // passed in body
+          measuredHeightCm: manualWaterLevelInCm,
           waterLevelLiters: manualWaterLevelLiters
         },
         comparison: {
@@ -8354,6 +8359,8 @@ exports.compareMeasuredHeight = async (req, reply) => {
 
 
 
+
+
 //const ExcelJS = require('exceljs');
 //const IotData = require('../models/IotData'); // adjust the path