diff --git a/docs/api/structures/cpu-usage.md b/docs/api/structures/cpu-usage.md
index 00c267533a1ee..8fa6cb79efe21 100644
--- a/docs/api/structures/cpu-usage.md
+++ b/docs/api/structures/cpu-usage.md
@@ -2,6 +2,7 @@
 
 * `percentCPUUsage` number - Percentage of CPU used since the last call to getCPUUsage.
   First call returns 0.
+* `cumulativeCPUUsage` number - Total seconds of CPU time used since process startup.
 * `idleWakeupsPerSecond` number - The number of average idle CPU wakeups per second
   since the last call to getCPUUsage. First call returns 0. Will always return 0 on
   Windows.
diff --git a/shell/browser/api/electron_api_app.cc b/shell/browser/api/electron_api_app.cc
index cad66ef5e8129..dd8928d8c789d 100644
--- a/shell/browser/api/electron_api_app.cc
+++ b/shell/browser/api/electron_api_app.cc
@@ -1280,6 +1280,7 @@ std::vector<gin_helper::Dictionary> App::GetAppMetrics(v8::Isolate* isolate) {
     std::optional<double> usage =
         process_metric.second->metrics->GetPlatformIndependentCPUUsage();
     cpu_dict.Set("percentCPUUsage", usage.value_or(0) / processor_count);
+    cpu_dict.Set("cumulativeCPUUsage", process_metric.second->metrics->GetCumulativeCPUUsage().InSecondsF());
 
 #if !BUILDFLAG(IS_WIN)
     cpu_dict.Set("idleWakeupsPerSecond",
diff --git a/shell/common/api/electron_bindings.cc b/shell/common/api/electron_bindings.cc
index d0ae770b73272..2cc125879cdf8 100644
--- a/shell/common/api/electron_bindings.cc
+++ b/shell/common/api/electron_bindings.cc
@@ -280,6 +280,8 @@ v8::Local<v8::Value> ElectronBindings::GetCPUUsage(
   std::optional<double> usage = metrics->GetPlatformIndependentCPUUsage();
   dict.Set("percentCPUUsage", usage.value_or(0) / processor_count);
 
+  dict.Set("cumulativeCPUUsage", metrics->GetCumulativeCPUUsage().InSecondsF());
+
   // NB: This will throw NOTIMPLEMENTED() on Windows
   // For backwards compatibility, we'll return 0
 #if !BUILDFLAG(IS_WIN)
diff --git a/spec/api-app-spec.ts b/spec/api-app-spec.ts
index 4b3f9d185c130..491f1cc859b1e 100644
--- a/spec/api-app-spec.ts
+++ b/spec/api-app-spec.ts
@@ -1442,6 +1442,7 @@ describe('app module', () => {
 
         types.push(entry.type);
         expect(entry.cpu).to.have.ownProperty('percentCPUUsage').that.is.a('number');
+        expect(entry.cpu).to.have.ownProperty('cumulativeCPUUsage').that.is.a('number');
         expect(entry.cpu).to.have.ownProperty('idleWakeupsPerSecond').that.is.a('number');
 
         expect(entry.memory).to.have.property('workingSetSize').that.is.greaterThan(0);
diff --git a/spec/api-process-spec.ts b/spec/api-process-spec.ts
index 909f6f5244de2..3a9a068cee8c3 100644
--- a/spec/api-process-spec.ts
+++ b/spec/api-process-spec.ts
@@ -26,6 +26,7 @@ describe('process module', () => {
       it('returns a cpu usage object', async () => {
         const cpuUsage = await w.webContents.executeJavaScript('process.getCPUUsage()');
         expect(cpuUsage.percentCPUUsage).to.be.a('number');
+        expect(cpuUsage.cumulativeCPUUsage).to.be.a('number');
         expect(cpuUsage.idleWakeupsPerSecond).to.be.a('number');
       });
     });
@@ -124,6 +125,7 @@ describe('process module', () => {
       it('returns a cpu usage object', () => {
         const cpuUsage = process.getCPUUsage();
         expect(cpuUsage.percentCPUUsage).to.be.a('number');
+        expect(cpuUsage.cumulativeCPUUsage).to.be.a('number');
         expect(cpuUsage.idleWakeupsPerSecond).to.be.a('number');
       });
     });