diff --git a/src/components/common/input/CalcInput.jsx b/src/components/common/input/CalcInput.jsx
index 14118b87..d386bd7d 100644
--- a/src/components/common/input/CalcInput.jsx
+++ b/src/components/common/input/CalcInput.jsx
@@ -3,7 +3,7 @@ import { createCalculator } from '@/util/calc-utils'
 import '@/styles/calc.scss'
 
 export const CalculatorInput = forwardRef(
-  ({ value, onChange, label, options = {}, id, className = 'calculator-input', readOnly = false, placeholder, name='', disabled = false }, ref) => {
+  ({ value, onChange, label, options = {}, id, className = 'calculator-input', readOnly = false, placeholder, name='', disabled = false, maxLength = 6 }, ref) => {
     const [showKeypad, setShowKeypad] = useState(false)
     const [displayValue, setDisplayValue] = useState(value || '0')
     const [hasOperation, setHasOperation] = useState(false)
@@ -48,6 +48,14 @@ export const CalculatorInput = forwardRef(
       const calculator = calculatorRef.current
       let newDisplayValue = ''
 
+      // maxLength 체크
+      if (maxLength > 0) {
+        const currentLength = (calculator.currentOperand || '').length + (calculator.previousOperand || '').length + (calculator.operation || '').length
+        if (currentLength >= maxLength) {
+          return
+        }
+      }
+
       // 소수점 이하 2자리 제한 로직 추가
       const shouldPreventInput = (value) => {
         if (!value) return false
@@ -57,6 +65,10 @@ export const CalculatorInput = forwardRef(
 
       // 숫자 추가 함수
       const appendNumber = (current, num) => {
+        // maxLength 체크
+        if (maxLength > 0 && (current + num).length > maxLength) {
+          return current
+        }
         // 현재 값이 0이고 소수점이 없을 때 0이 아닌 숫자를 입력하면 대체
         if (current === '0' && num !== '.' && !current.includes('.')) {
           return num.toString()
@@ -407,6 +419,7 @@ export const CalculatorInput = forwardRef(
           placeholder={placeholder}
           autoComplete={'off'}
           disabled={disabled}
+          maxLength={maxLength}
         />
 
         {showKeypad && !readOnly && (
diff --git a/src/components/estimate/Estimate.jsx b/src/components/estimate/Estimate.jsx
index 4cdffbed..a8f5f148 100644
--- a/src/components/estimate/Estimate.jsx
+++ b/src/components/estimate/Estimate.jsx
@@ -24,6 +24,7 @@ import { useSwal } from '@/hooks/useSwal'
 import { QcastContext } from '@/app/QcastProvider'
 import { useCanvasMenu } from '@/hooks/common/useCanvasMenu'
 import {normalizeDigits, normalizeDecimal} from '@/util/input-utils'
+import { CalculatorInput } from '@/components/common/input/CalcInput'
 export default function Estimate({}) {
   const [uniqueData, setUniqueData] = useState([])
   const [handlePricingFlag, setHandlePricingFlag] = useState(false)
@@ -2106,25 +2107,60 @@ export default function Estimate({}) {
                             </td>
                             <td>
                               <div className="input-wrap" style={{ width: '100%' }}>
-                                <input
-                                  type="text"
-                                  className="input-light al-r"
+                                {/*<input*/}
+                                {/*  type="text"*/}
+                                {/*  className="input-light al-r"*/}
+                                {/*  value={convertNumberToPriceDecimal(item?.amount?.replaceAll(',', ''))}*/}
+                                {/*  disabled={item.itemId === '' || !!item?.paDispOrder}*/}
+                                {/*  onChange={(e) => {*/}
+                                {/*    onChangeAmount(e.target.value, item.dispOrder, index)*/}
+                                {/*  }}*/}
+                                {/*  maxLength={6}*/}
+                                {/*/>*/}
+                                <CalculatorInput
+                                  className={"input-light al-r"}
                                   value={convertNumberToPriceDecimal(item?.amount?.replaceAll(',', ''))}
                                   disabled={item.itemId === '' || !!item?.paDispOrder}
-                                  onChange={(e) => {
-                                    onChangeAmount(e.target.value, item.dispOrder, index)
+                                  onChange={(value) =>{
+                                    onChangeAmount(value, item.dispOrder, index)
                                   }}
-                                  maxLength={6}
-                                />
+                                  options={{
+                                    allowNegative: false,
+                                    allowDecimal: false
+                                  }}
+                                  />
                               </div>
                             </td>
                             <td>{item.unit}</td>
                             <td>
                               <div className="form-flex-wrap">
                                 <div className="input-wrap mr5">
-                                  <input
-                                    type="text"
-                                    className="input-light al-r"
+                                  {/*<input*/}
+                                  {/*  type="text"*/}
+                                  {/*  className="input-light al-r"*/}
+                                  {/*  value={*/}
+                                  {/*    item.openFlg === '1'*/}
+                                  {/*      ? 'OPEN'*/}
+                                  {/*      : convertNumberToPriceDecimal(item?.showSalePrice === '0' ? null : item?.salePrice?.replaceAll(',', ''))*/}
+                                  {/*  }*/}
+                                  {/*  disabled={*/}
+                                  {/*    item.openFlg === '1'*/}
+                                  {/*      ? true*/}
+                                  {/*      : estimateContextState?.estimateType === 'YJSS'*/}
+                                  {/*        ? item?.paDispOrder*/}
+                                  {/*          ? true*/}
+                                  {/*          : item.pkgMaterialFlg !== '1'*/}
+                                  {/*        : item.itemId === '' || !!item?.paDispOrder*/}
+                                  {/*          ? true*/}
+                                  {/*          : item.openFlg === '1'*/}
+                                  {/*  }*/}
+                                  {/*  onChange={(e) => {*/}
+                                  {/*    onChangeSalePrice(e.target.value, item.dispOrder, index)*/}
+                                  {/*  }}*/}
+                                  {/*  maxLength={12}*/}
+                                  {/*/>*/}
+                                  <CalculatorInput
+                                    className={"input-light al-r"}
                                     value={
                                       item.openFlg === '1'
                                         ? 'OPEN'
@@ -2140,13 +2176,15 @@ export default function Estimate({}) {
                                           : item.itemId === '' || !!item?.paDispOrder
                                             ? true
                                             : item.openFlg === '1'
-                                              ? true
-                                              : false
                                     }
-                                    onChange={(e) => {
-                                      onChangeSalePrice(e.target.value, item.dispOrder, index)
+                                    onChange={(value) =>{
+                                      onChangeSalePrice(value, item.dispOrder, index)
                                     }}
                                     maxLength={12}
+                                    options={{
+                                      allowNegative: false,
+                                      allowDecimal: false
+                                    }}
                                   />
                                 </div>
                                 {item.openFlg === '1' && (
diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index d1019c66..943f1f38 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -871,7 +871,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         //newPStart.y = wallLine.y1;
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.x2).minus(roofLine.x2).abs().toNumber()
-                        newPStart.y = Big(wallBaseLine.y1).minus(rLineM).abs().toNumber()
+                        newPStart.y = Big(wallBaseLine.y1).minus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPStart.y, x: newPStart.x })
                         if (inLine) {
                           if (inLine.x2 > inLine.x1) {
@@ -927,7 +927,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
 
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.x2).minus(roofLine.x2).abs().toNumber()
-                        newPEnd.y = Big(wallBaseLine.y2).plus(rLineM).abs().toNumber()
+                        newPEnd.y = Big(wallBaseLine.y2).plus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPEnd.y, x: newPEnd.x })
                         if (inLine) {
                           if (inLine.x2 > inLine.x1) {
@@ -1041,7 +1041,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         //newPStart.y = wallLine.y1;
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.x1).minus(roofLine.x1).abs().toNumber()
-                        newPStart.y = Big(wallBaseLine.y1).plus(rLineM).abs().toNumber()
+                        newPStart.y = Big(wallBaseLine.y1).plus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPStart.y, x: newPStart.x })
                         if (inLine) {
                           if (inLine.x2 > inLine.x1) {
@@ -1096,7 +1096,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
 
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.x2).minus(roofLine.x2).abs().toNumber()
-                        newPEnd.y = Big(wallBaseLine.y2).minus(rLineM).abs().toNumber()
+                        newPEnd.y = Big(wallBaseLine.y2).minus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPEnd.y, x: newPEnd.x })
                         if (inLine) {
                           if (inLine.x2 > inLine.x1) {
@@ -1229,7 +1229,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                       } else {
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.y1).minus(roofLine.y1).abs().toNumber()
-                        newPStart.x = Big(wallBaseLine.x1).plus(rLineM).abs().toNumber()
+                        newPStart.x = Big(wallBaseLine.x1).plus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPStart.y, x: newPStart.x })
                         if (inLine) {
                           if (inLine.y2 > inLine.y1) {
@@ -1282,7 +1282,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         //newPEnd.x = wallLine.x2;
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.y2).minus(roofLine.y2).abs().toNumber()
-                        newPEnd.x = Big(wallBaseLine.x2).minus(rLineM).abs().toNumber()
+                        newPEnd.x = Big(wallBaseLine.x2).minus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPEnd.y, x: newPEnd.x })
                         if (inLine) {
                           if (inLine.y1 > inLine.y2) {
@@ -1392,7 +1392,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         //newPStart.x = wallLine.x1;
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.y1).minus(roofLine.y1).abs().toNumber()
-                        newPStart.x = Big(wallBaseLine.x1).minus(rLineM).abs().toNumber()
+                        newPStart.x = Big(wallBaseLine.x1).minus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPStart.y, x: newPStart.x })
                         if (inLine) {
                           if (inLine.y2 > inLine.y1) {
@@ -1446,7 +1446,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         //newPEnd.x = wallLine.x2;
                         //외곽 라인 그리기
                         const rLineM = Big(wallBaseLine.y2).minus(roofLine.y2).abs().toNumber()
-                        newPEnd.x = Big(wallBaseLine.x2).plus(rLineM).abs().toNumber()
+                        newPEnd.x = Big(wallBaseLine.x2).plus(rLineM).toNumber()
                         const inLine = findLineContainingPoint(innerLines, { y: newPEnd.y, x: newPEnd.x })
                         if (inLine) {
                           if (inLine.y1 > inLine.y2) {