diff --git a/packages/react-reconciler/src/ReactFiber.js b/packages/react-reconciler/src/ReactFiber.js
index e73ca22142c..0b40046856b 100644
--- a/packages/react-reconciler/src/ReactFiber.js
+++ b/packages/react-reconciler/src/ReactFiber.js
@@ -166,12 +166,12 @@ export type Fiber = {|
   // Duration of the most recent render time for this Fiber.
   // This value is not updated when we bailout for memoization purposes.
   // This field is only set when the enableProfilerTimer flag is enabled.
-  selfBaseTime?: number,
+  selfBaseDuration?: number,
 
   // Sum of base times for all descedents of this Fiber.
   // This value bubbles up during the "complete" phase.
   // This field is only set when the enableProfilerTimer flag is enabled.
-  treeBaseTime?: number,
+  treeBaseDuration?: number,
 
   // Conceptual aliases
   // workInProgress : Fiber ->  alternate The alternate used for reuse happens
@@ -230,8 +230,8 @@ function FiberNode(
   if (enableProfilerTimer) {
     this.actualDuration = 0;
     this.actualStartTime = 0;
-    this.selfBaseTime = 0;
-    this.treeBaseTime = 0;
+    this.selfBaseDuration = 0;
+    this.treeBaseDuration = 0;
   }
 
   if (__DEV__) {
@@ -338,8 +338,8 @@ export function createWorkInProgress(
   workInProgress.ref = current.ref;
 
   if (enableProfilerTimer) {
-    workInProgress.selfBaseTime = current.selfBaseTime;
-    workInProgress.treeBaseTime = current.treeBaseTime;
+    workInProgress.selfBaseDuration = current.selfBaseDuration;
+    workInProgress.treeBaseDuration = current.treeBaseDuration;
   }
 
   return workInProgress;
@@ -569,8 +569,8 @@ export function assignFiberPropertiesInDEV(
   if (enableProfilerTimer) {
     target.actualDuration = source.actualDuration;
     target.actualStartTime = source.actualStartTime;
-    target.selfBaseTime = source.selfBaseTime;
-    target.treeBaseTime = source.treeBaseTime;
+    target.selfBaseDuration = source.selfBaseDuration;
+    target.treeBaseDuration = source.treeBaseDuration;
   }
   target._debugID = source._debugID;
   target._debugSource = source._debugSource;
diff --git a/packages/react-reconciler/src/ReactFiberCommitWork.js b/packages/react-reconciler/src/ReactFiberCommitWork.js
index f0af9ff1800..9eb54495a9a 100644
--- a/packages/react-reconciler/src/ReactFiberCommitWork.js
+++ b/packages/react-reconciler/src/ReactFiberCommitWork.js
@@ -830,7 +830,7 @@ function commitWork(current: Fiber | null, finishedWork: Fiber): void {
           finishedWork.memoizedProps.id,
           current === null ? 'mount' : 'update',
           finishedWork.actualDuration,
-          finishedWork.treeBaseTime,
+          finishedWork.treeBaseDuration,
           finishedWork.actualStartTime,
           getCommitTime(),
         );
diff --git a/packages/react-reconciler/src/ReactFiberScheduler.js b/packages/react-reconciler/src/ReactFiberScheduler.js
index 2f10fb537f1..c4f3c8aeecf 100644
--- a/packages/react-reconciler/src/ReactFiberScheduler.js
+++ b/packages/react-reconciler/src/ReactFiberScheduler.js
@@ -736,10 +736,10 @@ function resetExpirationTime(
   // Bubble up the earliest expiration time.
   // (And "base" render timers if that feature flag is enabled)
   if (enableProfilerTimer && workInProgress.mode & ProfileMode) {
-    let treeBaseTime = workInProgress.selfBaseTime;
+    let treeBaseDuration = workInProgress.selfBaseDuration;
     let child = workInProgress.child;
     while (child !== null) {
-      treeBaseTime += child.treeBaseTime;
+      treeBaseDuration += child.treeBaseDuration;
       if (
         child.expirationTime !== NoWork &&
         (newExpirationTime === NoWork ||
@@ -749,7 +749,7 @@ function resetExpirationTime(
       }
       child = child.sibling;
     }
-    workInProgress.treeBaseTime = treeBaseTime;
+    workInProgress.treeBaseDuration = treeBaseDuration;
   } else {
     let child = workInProgress.child;
     while (child !== null) {
diff --git a/packages/react-reconciler/src/ReactProfilerTimer.js b/packages/react-reconciler/src/ReactProfilerTimer.js
index fe43dac6fbc..7f707141d9a 100644
--- a/packages/react-reconciler/src/ReactProfilerTimer.js
+++ b/packages/react-reconciler/src/ReactProfilerTimer.js
@@ -153,7 +153,7 @@ function recordElapsedBaseRenderTimeIfRunning(fiber: Fiber): void {
     return;
   }
   if (baseStartTime !== -1) {
-    fiber.selfBaseTime = now() - baseStartTime;
+    fiber.selfBaseDuration = now() - baseStartTime;
   }
 }
 
diff --git a/packages/react/src/__tests__/ReactProfilerDevToolsIntegration-test.internal.js b/packages/react/src/__tests__/ReactProfilerDevToolsIntegration-test.internal.js
index 2e20c376f3a..bff7ad131ce 100644
--- a/packages/react/src/__tests__/ReactProfilerDevToolsIntegration-test.internal.js
+++ b/packages/react/src/__tests__/ReactProfilerDevToolsIntegration-test.internal.js
@@ -92,7 +92,9 @@ describe('ReactProfiler DevTools integration', () => {
     // At this point, the base time should include both:
     // The time 2ms in the App component itself, and
     // The 10ms spend in the Profiler sub-tree beneath.
-    expect(rendered.root.findByType(App)._currentFiber().treeBaseTime).toBe(12);
+    expect(rendered.root.findByType(App)._currentFiber().treeBaseDuration).toBe(
+      12,
+    );
 
     rendered.update(<App multiplier={2} />);
 
@@ -106,7 +108,9 @@ describe('ReactProfiler DevTools integration', () => {
     // At this point, the base time should include both:
     // The initial 9ms for the components that do not re-render, and
     // The updated 6ms for the component that does.
-    expect(rendered.root.findByType(App)._currentFiber().treeBaseTime).toBe(15);
+    expect(rendered.root.findByType(App)._currentFiber().treeBaseDuration).toBe(
+      15,
+    );
   });
 
   it('should reset the fiber stack correctly after an error when profiling host roots', () => {
@@ -141,8 +145,8 @@ describe('ReactProfiler DevTools integration', () => {
     // At this point, the base time should include only the most recent (not failed) render.
     // It should not include time spent on the initial render,
     // Or time that elapsed between any of the above renders.
-    expect(rendered.root.findByType('div')._currentFiber().treeBaseTime).toBe(
-      7,
-    );
+    expect(
+      rendered.root.findByType('div')._currentFiber().treeBaseDuration,
+    ).toBe(7);
   });
 });