diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -861,20 +861,12 @@
                   DEFAULT_CHECKBLOCKS),
         ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY,
         OptionsCategory::DEBUG_TEST);
-    argsman.AddArg(
-        "-checklevel=<n>",
-        strprintf("How thorough the block verification of "
-                  "-checkblocks is: "
-                  "level 0 reads the blocks from disk, "
-                  "level 1 verifies block validity, "
-                  "level 2 verifies undo data, "
-                  "level 3 checks disconnection of tip blocks, "
-                  "and level 4 tries to reconnect the blocks. "
-                  "Each level includes the checks of the previous levels "
-                  "(0-4, default: %u)",
-                  DEFAULT_CHECKLEVEL),
-        ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY,
-        OptionsCategory::DEBUG_TEST);
+    argsman.AddArg("-checklevel=<n>",
+                   strprintf("How thorough the block verification of "
+                             "-checkblocks is: %s (0-4, default: %u)",
+                             Join(CHECKLEVEL_DOC, ", "), DEFAULT_CHECKLEVEL),
+                   ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY,
+                   OptionsCategory::DEBUG_TEST);
     argsman.AddArg("-checkblockindex",
                    strprintf("Do a consistency check for the block tree, "
                              "chainstate, and other validation data structures "
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1330,7 +1330,8 @@
         {
             {"checklevel", RPCArg::Type::NUM,
              /* default */ strprintf("%d, range=0-4", DEFAULT_CHECKLEVEL),
-             "How thorough the block verification is."},
+             strprintf("How thorough the block verification is:\n - %s",
+                       Join(CHECKLEVEL_DOC, "\n- "))},
             {"nblocks", RPCArg::Type::NUM,
              /* default */ strprintf("%d, 0=all", DEFAULT_CHECKBLOCKS),
              "The number of blocks to check."},
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -33,6 +33,7 @@
 #include <memory>
 #include <optional>
 #include <set>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -173,6 +174,8 @@
 extern bool fPruneMode;
 /** Number of MiB of block files that we're trying to stay below. */
 extern uint64_t nPruneTarget;
+/** Documentation for argument 'checklevel'. */
+extern const std::vector<std::string> CHECKLEVEL_DOC;
 
 class BlockValidationOptions {
 private:
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -65,6 +65,14 @@
 static constexpr std::chrono::hours DATABASE_WRITE_INTERVAL{1};
 /** Time to wait between flushing chainstate to disk. */
 static constexpr std::chrono::hours DATABASE_FLUSH_INTERVAL{24};
+const std::vector<std::string> CHECKLEVEL_DOC{
+    "level 0 reads the blocks from disk",
+    "level 1 verifies block validity",
+    "level 2 verifies undo data",
+    "level 3 checks disconnection of tip blocks",
+    "level 4 tries to reconnect the blocks",
+    "each level includes the checks of the previous levels",
+};
 
 ChainstateManager g_chainman;