diff --git a/source/mijin/async/coroutine.cpp b/source/mijin/async/coroutine.cpp
index 6684b26..65da812 100644
--- a/source/mijin/async/coroutine.cpp
+++ b/source/mijin/async/coroutine.cpp
@@ -174,6 +174,20 @@ void SimpleTaskLoop::addStoredTask(StoredTask&& storedTask) noexcept
     }
 }
 
+std::size_t SimpleTaskLoop::getActiveTasks() const noexcept
+{
+    std::size_t sum = 0;
+    for (const StoredTask& task : mijin::chain(tasks_, newTasks_))
+    {
+        const TaskStatus status = task.task ? task.task->status() : TaskStatus::FINISHED;
+        if (status == TaskStatus::SUSPENDED || status == TaskStatus::RUNNING)
+        {
+            ++sum;
+        }
+    }
+    return sum;
+}
+
 void MultiThreadedTaskLoop::transferCurrentTask(TaskLoop& otherLoop) noexcept
 {
     if (&otherLoop == this) {
diff --git a/source/mijin/async/coroutine.hpp b/source/mijin/async/coroutine.hpp
index a45c878..f659b38 100644
--- a/source/mijin/async/coroutine.hpp
+++ b/source/mijin/async/coroutine.hpp
@@ -542,6 +542,7 @@ public: // TaskLoop implementation
 public: // public interface
     [[nodiscard]] constexpr bool empty() const noexcept { return tasks_.empty() && newTasks_.empty(); }
     [[nodiscard]] constexpr std::size_t getNumTasks() const noexcept { return tasks_.size() + newTasks_.size(); }
+    [[nodiscard]] std::size_t getActiveTasks() const noexcept;
     inline CanContinue tick();
     inline void runUntilDone(IgnoreWaiting ignoreWaiting = IgnoreWaiting::NO);
     inline void cancelAllTasks() noexcept;