diff --git a/Formula/lfortran.rb b/Formula/lfortran.rb
new file mode 100644
index 0000000..661cef2
--- /dev/null
+++ b/Formula/lfortran.rb
@@ -0,0 +1,49 @@
+class Lfortran < Formula
+  desc "Modern interactive LLVM-based Fortran compiler"
+  homepage "https://lfortran.org"
+  url "https://lfortran.github.io/tarballs/release/lfortran-0.10.0.tar.gz"
+  sha256 "53b727fa795dd1f44656c50c647f80885c4eede98f719ab7129ee6502e27684f"
+  license "BSD-3-Clause"
+
+  head do
+    url "https://gitlab.com/lfortran/lfortran.git"
+
+    depends_on "binutils" => :build
+    depends_on "bison" => :build
+    depends_on "re2c" => :build
+  end
+
+  depends_on "cmake" => :build
+  depends_on "llvm" => [:build, :recommended]
+  depends_on "fmt" => :recommended
+  depends_on "rapidjson" => :recommended
+
+  uses_from_macos "libxml2"
+  uses_from_macos "zlib"
+
+  def install
+    inreplace "src/lfortran/CMakeLists.txt", "p::zlib", "system_zlib"
+    inreplace "cmake/FindZLIB.cmake", "p::zlib", "system_zlib"
+
+    args = std_cmake_args
+    args << "-DWITH_LLVM=on" if build.with? "llvm"
+    args << "-DWITH_FMT=on" if build.with? "fmt"
+    args << "-DWITH_JSON=on" if build.with? "rapidjson"
+
+    system "./build0.sh" if build.head?
+    system "cmake", "-S", ".", "-B", "build", *args
+    system "cmake", "--build", "build"
+    system "cmake", "--install", "build"
+  end
+
+  test do
+    (testpath/"test.f90").write <<~EOS
+      PROGRAM test
+        WRITE(*,'(A)') 'Hello World!'
+      ENDPROGRAM
+    EOS
+
+    system "#{bin}/lfortran", "test.f90", "-o", "test"
+    assert_equal "Hello World!", shell_output("./test").chomp
+  end
+end