diff --git a/shared-data/definitions2/corning_6_wellPlate_16.8_mL.json b/shared-data/definitions2/corning_6_wellPlate_16.8_mL.json
index 07e918cd44ab..cfa742f8f354 100644
--- a/shared-data/definitions2/corning_6_wellPlate_16.8_mL.json
+++ b/shared-data/definitions2/corning_6_wellPlate_16.8_mL.json
@@ -30,7 +30,7 @@
     },
     "cornerOffsetFromSlot": {
         "x": 0,
-        "y": -0.01,
+        "y": 0.01,
         "z": 0
     },
     "dimensions": {
diff --git a/shared-data/js/__tests__/fixtures/labwareExample2.json b/shared-data/js/__tests__/fixtures/labwareExample2.json
index f0f5c443e792..b855d9a7ce6d 100644
--- a/shared-data/js/__tests__/fixtures/labwareExample2.json
+++ b/shared-data/js/__tests__/fixtures/labwareExample2.json
@@ -14,8 +14,8 @@
     "isMagneticModuleCompatible": false
   },
   "cornerOffsetFromSlot": {
-    "x": -77.76,
-    "y": -35.48,
+    "x": 77.76,
+    "y": 35.48,
     "z": 0
   },
   "dimensions": {
diff --git a/shared-data/js/labwareTools/__tests__/createIrregularLabware.test.js b/shared-data/js/labwareTools/__tests__/createIrregularLabware.test.js
index e553e904d7a9..4e143948f934 100644
--- a/shared-data/js/labwareTools/__tests__/createIrregularLabware.test.js
+++ b/shared-data/js/labwareTools/__tests__/createIrregularLabware.test.js
@@ -6,6 +6,7 @@ import {
   _irregularWellName,
   _generateIrregularLoadName,
   _calculateWellCoord,
+  _calculateCornerOffset,
 } from '../index.js'
 import {splitWellsOnColumn, sortWells} from '../../helpers/index.js'
 
@@ -14,6 +15,20 @@ import exampleLabware1 from '../../__tests__/fixtures/irregularLabwareExample1.j
 jest.mock('../assignId', () => jest.fn(() => 'mock-id'))
 
 describe('test helper functions', () => {
+  test('cornerOffsetFromSLot outputs correctly', () => {
+    // If smaller than slot, positive values
+    // If larger than slot, negative values
+    const smallerDims = {overallLength: 100, overallWidth: 80, overallHeight: 10}
+    const largerDims = {overallLength: 200, overallWidth: 90, overallHeight: 10}
+    const offset = _calculateCornerOffset(smallerDims)
+    const offset2 = _calculateCornerOffset(largerDims)
+
+    expect(offset.x).toBeGreaterThan(0)
+    expect(offset.y).toBeGreaterThan(0)
+    expect(offset2.x).toBeLessThan(0)
+    expect(offset2.y).toBeLessThan(0)
+
+  })
   test('Well name generated correctly', () => {
     const grid = {row: 2, column: 2}
     const gridStart = [{rowStart: 'A', colStart: '1', rowStride: 1, colStride: 2}, {rowStart: 'B', colStart: '1', rowStride: 3, colStride: 1}]
diff --git a/shared-data/js/labwareTools/index.js b/shared-data/js/labwareTools/index.js
index 76892760e392..1359f38aa4db 100644
--- a/shared-data/js/labwareTools/index.js
+++ b/shared-data/js/labwareTools/index.js
@@ -201,10 +201,10 @@ function calculateCoordinates (
   }, {})
 }
 
-function calculateCornerOffset (dimensions: Dimensions): {string: number} {
+export function _calculateCornerOffset (dimensions: Dimensions): Offset {
   return {
-    x: round(dimensions.overallLength - SLOT_LENGTH_MM, 2),
-    y: round(dimensions.overallWidth - SLOT_WIDTH_MM, 2),
+    x: round(SLOT_LENGTH_MM - dimensions.overallLength, 2),
+    y: round(SLOT_WIDTH_MM - dimensions.overallWidth, 2),
     z: 0}
 }
 // Generator function for labware definitions within a regular grid format
@@ -218,7 +218,7 @@ export function createRegularLabware (args: RegularLabwareProps): Schema {
     otId: assignId(),
     deprecated: false,
     metadata: args.metadata,
-    cornerOffsetFromSlot: calculateCornerOffset(args.dimensions),
+    cornerOffsetFromSlot: _calculateCornerOffset(args.dimensions),
     dimensions: args.dimensions,
     parameters: args.parameters,
     wells: calculateCoordinates(args.well, ordering, args.spacing, args.offset),
@@ -256,7 +256,7 @@ export function createIrregularLabware (args: IrregularLabwareProps): Schema {
     otId: assignId(),
     deprecated: false,
     metadata: args.metadata,
-    cornerOffsetFromSlot: calculateCornerOffset(args.dimensions),
+    cornerOffsetFromSlot: _calculateCornerOffset(args.dimensions),
     dimensions: args.dimensions,
     parameters: {
       ...args.parameters,