diff --git a/types/postcss-calc/index.d.ts b/types/postcss-calc/index.d.ts
new file mode 100644
index 0000000000..c9ac8e30bb
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+++ b/types/postcss-calc/index.d.ts
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+// Type definitions for postcss-calc 7.0
+// Project: https://github.com/postcss/postcss-calc
+// Definitions by: Jeow Li Huan <https://github.com/huan086>
+// Definitions: https://github.com/huan086/postcss-plugins-typings
+// TypeScript Version: 2.2
+
+import { Plugin } from "postcss";
+
+declare namespace calc {
+    interface Options {
+        precision?: number;
+        preserve?: boolean;
+        warnWhenCannotResolve?: boolean;
+        mediaQueries?: boolean;
+        selectors?: boolean;
+    }
+
+    type Calc = Plugin<Options>;
+}
+
+declare const calc: calc.Calc;
+export = calc;
diff --git a/types/postcss-calc/package.json b/types/postcss-calc/package.json
new file mode 100644
index 0000000000..1e1a719545
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+++ b/types/postcss-calc/package.json
@@ -0,0 +1,6 @@
+{
+    "private": true,
+    "dependencies": {
+        "postcss": "7.x.x"
+    }
+}
diff --git a/types/postcss-calc/postcss-calc-tests.ts b/types/postcss-calc/postcss-calc-tests.ts
new file mode 100644
index 0000000000..937741a1f3
--- /dev/null
+++ b/types/postcss-calc/postcss-calc-tests.ts
@@ -0,0 +1,12 @@
+import calc = require("postcss-calc");
+import { Transformer } from 'postcss';
+
+const ap1: Transformer = calc();
+
+const ap2: Transformer = calc({
+    precision: 5,
+    preserve: false,
+    warnWhenCannotResolve: false,
+    mediaQueries: false,
+    selectors: false
+});
diff --git a/types/postcss-calc/tsconfig.json b/types/postcss-calc/tsconfig.json
new file mode 100644
index 0000000000..d21d8b4969
--- /dev/null
+++ b/types/postcss-calc/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "postcss-calc-tests.ts"
+    ]
+}
diff --git a/types/postcss-calc/tslint.json b/types/postcss-calc/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
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+++ b/types/postcss-calc/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }