diff --git a/packages/mermaid/src/config.type.ts b/packages/mermaid/src/config.type.ts
index 035a158e0..cd8401d7c 100644
--- a/packages/mermaid/src/config.type.ts
+++ b/packages/mermaid/src/config.type.ts
@@ -793,6 +793,8 @@ export interface ErDiagramConfig extends BaseDiagramConfig {
    *
    */
   entityPadding?: number;
+  nodeSpacing?: number;
+  rankSpacing?: number;
   /**
    * Stroke color of box edges and lines.
    */
diff --git a/packages/mermaid/src/diagrams/er/erDb.js b/packages/mermaid/src/diagrams/er/erDb.js
deleted file mode 100644
index f24f48198..000000000
--- a/packages/mermaid/src/diagrams/er/erDb.js
+++ /dev/null
@@ -1,103 +0,0 @@
-import { log } from '../../logger.js';
-import { getConfig } from '../../diagram-api/diagramAPI.js';
-
-import {
-  setAccTitle,
-  getAccTitle,
-  getAccDescription,
-  setAccDescription,
-  clear as commonClear,
-  setDiagramTitle,
-  getDiagramTitle,
-} from '../common/commonDb.js';
-
-let entities = new Map();
-let relationships = [];
-
-const Cardinality = {
-  ZERO_OR_ONE: 'ZERO_OR_ONE',
-  ZERO_OR_MORE: 'ZERO_OR_MORE',
-  ONE_OR_MORE: 'ONE_OR_MORE',
-  ONLY_ONE: 'ONLY_ONE',
-  MD_PARENT: 'MD_PARENT',
-};
-
-const Identification = {
-  NON_IDENTIFYING: 'NON_IDENTIFYING',
-  IDENTIFYING: 'IDENTIFYING',
-};
-/**
- * Add entity
- * @param {string} name - The name of the entity
- * @param {string | undefined} alias - The alias of the entity
- */
-const addEntity = function (name, alias = undefined) {
-  if (!entities.has(name)) {
-    entities.set(name, { attributes: [], alias });
-    log.info('Added new entity :', name);
-  } else if (!entities.get(name).alias && alias) {
-    entities.get(name).alias = alias;
-    log.info(`Add alias '${alias}' to entity '${name}'`);
-  }
-
-  return entities.get(name);
-};
-
-const getEntities = () => entities;
-
-const addAttributes = function (entityName, attribs) {
-  let entity = addEntity(entityName); // May do nothing (if entity has already been added)
-
-  // Process attribs in reverse order due to effect of recursive construction (last attribute is first)
-  let i;
-  for (i = attribs.length - 1; i >= 0; i--) {
-    entity.attributes.push(attribs[i]);
-    log.debug('Added attribute ', attribs[i].attributeName);
-  }
-};
-
-/**
- * Add a relationship
- *
- * @param entA The first entity in the relationship
- * @param rolA The role played by the first entity in relation to the second
- * @param entB The second entity in the relationship
- * @param rSpec The details of the relationship between the two entities
- */
-const addRelationship = function (entA, rolA, entB, rSpec) {
-  let rel = {
-    entityA: entA,
-    roleA: rolA,
-    entityB: entB,
-    relSpec: rSpec,
-  };
-
-  relationships.push(rel);
-  log.debug('Added new relationship :', rel);
-};
-
-const getRelationships = () => relationships;
-
-const clear = function () {
-  entities = new Map();
-  relationships = [];
-  commonClear();
-};
-
-export default {
-  Cardinality,
-  Identification,
-  getConfig: () => getConfig().er,
-  addEntity,
-  addAttributes,
-  getEntities,
-  addRelationship,
-  getRelationships,
-  clear,
-  setAccTitle,
-  getAccTitle,
-  setAccDescription,
-  getAccDescription,
-  setDiagramTitle,
-  getDiagramTitle,
-};
diff --git a/packages/mermaid/src/diagrams/er/erDb.ts b/packages/mermaid/src/diagrams/er/erDb.ts
new file mode 100644
index 000000000..c8ea3136c
--- /dev/null
+++ b/packages/mermaid/src/diagrams/er/erDb.ts
@@ -0,0 +1,240 @@
+import { log } from '../../logger.js';
+import { getConfig } from '../../diagram-api/diagramAPI.js';
+import type { Edge, Node } from '../../rendering-util/types.js';
+import type { EntityNode, Attribute, Relationship, EntityClass, RelSpec } from './erTypes.js';
+
+import {
+  setAccTitle,
+  getAccTitle,
+  getAccDescription,
+  setAccDescription,
+  clear as commonClear,
+  setDiagramTitle,
+  getDiagramTitle,
+} from '../common/commonDb.js';
+import { getEdgeId } from '../../utils.js';
+
+let entities = new Map<string, EntityNode>();
+let relationships: Relationship[] = [];
+let classes = new Map<string, EntityClass>();
+let direction = 'TB';
+
+const Cardinality = {
+  ZERO_OR_ONE: 'ZERO_OR_ONE',
+  ZERO_OR_MORE: 'ZERO_OR_MORE',
+  ONE_OR_MORE: 'ONE_OR_MORE',
+  ONLY_ONE: 'ONLY_ONE',
+  MD_PARENT: 'MD_PARENT',
+};
+
+const Identification = {
+  NON_IDENTIFYING: 'NON_IDENTIFYING',
+  IDENTIFYING: 'IDENTIFYING',
+};
+/**
+ * Add entity
+ * @param name - The name of the entity
+ * @param alias - The alias of the entity
+ */
+const addEntity = function (name: string, alias = ''): EntityNode {
+  if (!entities.has(name)) {
+    entities.set(name, {
+      id: `entity-${name}-${entities.size}`,
+      label: name,
+      attributes: [],
+      alias,
+      shape: 'erBox',
+      look: getConfig().look || 'default',
+      cssClasses: [],
+      cssStyles: [],
+    });
+    log.info('Added new entity :', name);
+  } else if (!entities.get(name)?.alias && alias) {
+    entities.get(name)!.alias = alias;
+    log.info(`Add alias '${alias}' to entity '${name}'`);
+  }
+
+  return entities.get(name)!;
+};
+
+const getEntity = function (name: string) {
+  return entities.get(name);
+};
+
+const getEntities = () => entities;
+
+const getClasses = () => classes;
+
+const addAttributes = function (entityName: string, attribs: Attribute[]) {
+  const entity = addEntity(entityName); // May do nothing (if entity has already been added)
+
+  // Process attribs in reverse order due to effect of recursive construction (last attribute is first)
+  let i;
+  for (i = attribs.length - 1; i >= 0; i--) {
+    if (!attribs[i].keys) {
+      attribs[i].keys = [];
+    }
+    if (!attribs[i].comment) {
+      attribs[i].comment = '';
+    }
+    entity.attributes.push(attribs[i]);
+    log.debug('Added attribute ', attribs[i].name);
+  }
+};
+
+/**
+ * Add a relationship
+ *
+ * @param entA - The first entity in the relationship
+ * @param rolA - The role played by the first entity in relation to the second
+ * @param entB - The second entity in the relationship
+ * @param rSpec - The details of the relationship between the two entities
+ */
+const addRelationship = function (entA: string, rolA: string, entB: string, rSpec: RelSpec) {
+  const entityA = entities.get(entA);
+  const entityB = entities.get(entB);
+  if (!entityA || !entityB) {
+    return;
+  }
+
+  const rel = {
+    entityA: entityA.id,
+    roleA: rolA,
+    entityB: entityB.id,
+    relSpec: rSpec,
+  };
+
+  relationships.push(rel);
+  log.debug('Added new relationship :', rel);
+};
+
+const getRelationships = () => relationships;
+
+const getDirection = () => direction;
+const setDirection = (dir: string) => {
+  direction = dir;
+};
+
+const clear = function () {
+  entities = new Map();
+  classes = new Map();
+  relationships = [];
+  commonClear();
+};
+
+export const getData = function () {
+  const nodes: Node[] = [];
+  const edges: Edge[] = [];
+  const config = getConfig();
+
+  for (const entityKey of entities.keys()) {
+    const entityNode = entities.get(entityKey);
+    if (entityNode) {
+      entityNode.cssCompiledStyles = getCompiledStyles(entityNode.cssClasses!);
+      nodes.push(entityNode as unknown as Node);
+    }
+  }
+
+  let cnt = 0;
+  for (const relationship of relationships) {
+    const edge: Edge = {
+      id: getEdgeId(relationship.entityA, relationship.entityB, { prefix: 'id', counter: cnt++ }),
+      type: 'normal',
+      start: relationship.entityA,
+      end: relationship.entityB,
+      label: relationship.roleA,
+      labelpos: 'c',
+      thickness: 'normal',
+      classes: 'relationshipLine',
+      arrowTypeStart: relationship.relSpec.cardB.toLowerCase(),
+      arrowTypeEnd: relationship.relSpec.cardA.toLowerCase(),
+      pattern: relationship.relSpec.relType == 'IDENTIFYING' ? 'solid' : 'dashed',
+      look: config.look,
+    };
+    edges.push(edge);
+  }
+  return { nodes, edges, other: {}, config, direction: 'TB' };
+};
+
+export const addCssStyles = function (ids: string[], styles: string[]) {
+  for (const id of ids) {
+    const entity = entities.get(id);
+    if (!styles || !entity) {
+      return;
+    }
+    for (const style of styles) {
+      entity.cssStyles!.push(style);
+    }
+  }
+};
+
+export const addClass = function (ids: string[], style: string[]) {
+  ids.forEach(function (id) {
+    let classNode = classes.get(id);
+    if (classNode === undefined) {
+      classNode = { id, styles: [], textStyles: [] };
+      classes.set(id, classNode);
+    }
+
+    if (style) {
+      style.forEach(function (s) {
+        if (/color/.exec(s)) {
+          const newStyle = s.replace('fill', 'bgFill'); // .replace('color', 'fill');
+          classNode.textStyles.push(newStyle);
+        }
+        classNode.styles.push(s);
+      });
+    }
+  });
+};
+
+export const setClass = function (ids: string[], classNames: string[]) {
+  for (const id of ids) {
+    const entity = entities.get(id);
+    if (entity) {
+      for (const className of classNames) {
+        entity.cssClasses!.push(className);
+      }
+    }
+  }
+};
+
+function getCompiledStyles(classDefs: string[]) {
+  let compiledStyles: string[] = [];
+  for (const customClass of classDefs) {
+    const cssClass = classes.get(customClass);
+    if (cssClass?.styles) {
+      compiledStyles = [...compiledStyles, ...(cssClass.styles ?? [])].map((s) => s.trim());
+    }
+    if (cssClass?.textStyles) {
+      compiledStyles = [...compiledStyles, ...(cssClass.textStyles ?? [])].map((s) => s.trim());
+    }
+  }
+  return compiledStyles;
+}
+
+export default {
+  Cardinality,
+  Identification,
+  getConfig: () => getConfig().er,
+  addEntity,
+  addAttributes,
+  getEntities,
+  getEntity,
+  getClasses,
+  addRelationship,
+  getRelationships,
+  clear,
+  getDirection,
+  setDirection,
+  setAccTitle,
+  getAccTitle,
+  setAccDescription,
+  getAccDescription,
+  setDiagramTitle,
+  getDiagramTitle,
+  getData,
+  addCssStyles,
+  addClass,
+  setClass,
+};
diff --git a/packages/mermaid/src/diagrams/er/erDiagram.ts b/packages/mermaid/src/diagrams/er/erDiagram.ts
index adfa525fc..1647f181b 100644
--- a/packages/mermaid/src/diagrams/er/erDiagram.ts
+++ b/packages/mermaid/src/diagrams/er/erDiagram.ts
@@ -1,7 +1,7 @@
 // @ts-ignore: TODO: Fix ts errors
 import erParser from './parser/erDiagram.jison';
 import erDb from './erDb.js';
-import erRenderer from './erRenderer.js';
+import erRenderer from './erRenderer-unified.js';
 import erStyles from './styles.js';
 
 export const diagram = {
diff --git a/packages/mermaid/src/diagrams/er/erRenderer-unified.ts b/packages/mermaid/src/diagrams/er/erRenderer-unified.ts
new file mode 100644
index 000000000..be668df69
--- /dev/null
+++ b/packages/mermaid/src/diagrams/er/erRenderer-unified.ts
@@ -0,0 +1,46 @@
+import { getConfig } from '../../diagram-api/diagramAPI.js';
+import { log } from '../../logger.js';
+import { getDiagramElement } from '../../rendering-util/insertElementsForSize.js';
+import { getRegisteredLayoutAlgorithm, render } from '../../rendering-util/render.js';
+import { setupViewPortForSVG } from '../../rendering-util/setupViewPortForSVG.js';
+import type { LayoutData } from '../../rendering-util/types.js';
+import db from './erDb.js';
+import utils from '../../utils.js';
+
+export const draw = async function (text: string, id: string, _version: string, diag: any) {
+  log.info('REF0:');
+  log.info('Drawing er diagram (unified)', id);
+  const { securityLevel, er: conf, layout } = getConfig();
+
+  // The getData method provided in all supported diagrams is used to extract the data from the parsed structure
+  // into the Layout data format
+  const data4Layout = diag.db.getData() as LayoutData;
+
+  // Create the root SVG - the element is the div containing the SVG element
+  const svg = getDiagramElement(id, securityLevel);
+
+  data4Layout.type = diag.type;
+  data4Layout.layoutAlgorithm = getRegisteredLayoutAlgorithm(layout);
+
+  // Workaround as when rendering and setting up the graph it uses flowchart spacing before data4Layout spacing?
+  data4Layout.config.flowchart!.nodeSpacing = conf?.nodeSpacing || 140;
+  data4Layout.config.flowchart!.rankSpacing = conf?.rankSpacing || 80;
+  data4Layout.direction = db.getDirection();
+
+  data4Layout.markers = ['only_one', 'zero_or_one', 'one_or_more', 'zero_or_more'];
+  data4Layout.diagramId = id;
+  await render(data4Layout, svg);
+  const padding = 8;
+  utils.insertTitle(
+    svg,
+    'erDiagramTitleText',
+    conf?.titleTopMargin ?? 25,
+    diag.db.getDiagramTitle()
+  );
+
+  setupViewPortForSVG(svg, padding, 'erDiagram', conf?.useMaxWidth ?? true);
+};
+
+export default {
+  draw,
+};
diff --git a/packages/mermaid/src/diagrams/er/erTypes.ts b/packages/mermaid/src/diagrams/er/erTypes.ts
new file mode 100644
index 000000000..7670302f0
--- /dev/null
+++ b/packages/mermaid/src/diagrams/er/erTypes.ts
@@ -0,0 +1,37 @@
+export interface EntityNode {
+  id: string;
+  label: string;
+  attributes: Attribute[];
+  alias: string;
+  shape: string;
+  look?: string;
+  cssClasses?: string[];
+  cssStyles?: string[];
+  cssCompiledStyles?: string[];
+}
+
+export interface Attribute {
+  type: string;
+  name: string;
+  keys: ('PK' | 'FK' | 'UK')[];
+  comment: string;
+}
+
+export interface Relationship {
+  entityA: string;
+  roleA: string;
+  entityB: string;
+  relSpec: RelSpec;
+}
+
+export interface RelSpec {
+  cardA: string;
+  cardB: string;
+  relType: string;
+}
+
+export interface EntityClass {
+  id: string;
+  styles: string[];
+  textStyles: string[];
+}
diff --git a/packages/mermaid/src/diagrams/er/styles.js b/packages/mermaid/src/diagrams/er/styles.js
index 08ea2e851..45a9dd7ec 100644
--- a/packages/mermaid/src/diagrams/er/styles.js
+++ b/packages/mermaid/src/diagrams/er/styles.js
@@ -24,9 +24,36 @@ const getStyles = (options) =>
       }
   }
 
-    .relationshipLine {
-      stroke: ${options.lineColor};
-    }
+  .edgeLabel .label {
+    fill: ${options.nodeBorder};
+    font-size: 14px;
+  }
+
+  .edgeLabel .label .labelBkg {
+    background: ${options.mainBkg};
+  }
+
+  .node rect,
+  .node circle,
+  .node ellipse,
+  .node polygon,
+  .node path {
+    fill: ${options.mainBkg};
+    stroke: ${options.nodeBorder};
+    stroke-width: 1px;
+  }
+
+  .relationshipLine {
+    stroke: ${options.lineColor};
+    stroke-width: 1;
+    fill: none;
+  }
+
+  .marker {
+    fill: none !important;
+    stroke: ${options.lineColor} !important;
+    stroke-width: 1;
+  }
 
   .entityTitleText {
     text-anchor: middle;
diff --git a/packages/mermaid/src/schemas/config.schema.yaml b/packages/mermaid/src/schemas/config.schema.yaml
index a7b3549eb..980561084 100644
--- a/packages/mermaid/src/schemas/config.schema.yaml
+++ b/packages/mermaid/src/schemas/config.schema.yaml
@@ -1280,6 +1280,14 @@ $defs: # JSON Schema definition (maybe we should move these to a separate file)
         type: integer
         default: 15
         minimum: 0
+      nodeSpacing:
+        type: integer
+        default: 140
+        minimum: 0
+      rankSpacing:
+        type: integer
+        default: 80
+        minimum: 0
       stroke:
         description: Stroke color of box edges and lines.
         type: string