diff --git a/foundry.toml b/foundry.toml
index e6810b2..069113c 100644
--- a/foundry.toml
+++ b/foundry.toml
@@ -2,5 +2,6 @@
 src = 'src'
 out = 'out'
 libs = ['lib']
+gas_reports = ["ERC721ACHMock"]
 
 # See more config options https://github.com/foundry-rs/foundry/tree/master/config
\ No newline at end of file
diff --git a/test/ERC721ACH.t.sol b/test/ERC721ACH.t.sol
index 8348e25..f8a3126 100644
--- a/test/ERC721ACH.t.sol
+++ b/test/ERC721ACH.t.sol
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.15;
 
+
+import "forge-std/console.sol";
 import {Vm} from "forge-std/Vm.sol";
 import {DSTest} from "ds-test/test.sol";
 import {ERC721ACHMock} from "./utils/ERC721ACHMock.sol";
@@ -144,4 +146,43 @@ contract ERC721ACHTest is DSTest {
             address(erc721Mock.isApprovedForAllHook())
         );
     }
+
+        function test_gasEstimateForSingleMint() public {
+        address buyer = address(0x1111);
+        console.logString(
+            "=====================gas estimation for minting single NFT=========================="
+        );
+        uint originGasLeft;
+        uint gasDelta;
+        originGasLeft = gasleft();
+        erc721Mock.mint(buyer, 1);
+        gasDelta = originGasLeft - gasleft() - 100;
+        console.log("gasDelta: %d", gasDelta);
+    }
+
+    function test_gasEstimateForMint2NFTs() public {
+        address buyer = address(0x1111);
+        console.logString(
+            "=====================gas estimation for minting 2 NFT=========================="
+        );
+        uint originGasLeft;
+        uint gasDelta;
+        originGasLeft = gasleft();
+        erc721Mock.mint(buyer, 2);
+        gasDelta = originGasLeft - gasleft() - 100;
+        console.log("gasDelta: %d", gasDelta);
+    }
+
+    function test_gasEstimateForMint3NFTs() public {
+        address buyer = address(0x1111);
+        console.logString(
+            "=====================gas estimation for minting 3 NFT=========================="
+        );
+        uint originGasLeft;
+        uint gasDelta;
+        originGasLeft = gasleft();
+        erc721Mock.mint(buyer, 3);
+        gasDelta = originGasLeft - gasleft() - 100;
+        console.log("gasDelta: %d", gasDelta);
+    }
 }