1diff --git a/DOCS.md b/DOCS.md
  2index be16712..5cff1f3 100644
  3--- a/DOCS.md
  4+++ b/DOCS.md
  5@@ -1593,3 +1593,11 @@
  6 @param value - Text to convert. 
  7 @constructor
  8 ```
  9+
 10+### UPPER 
 11+
 12+```
 13+  Converts text to uppercase. 
 14+@param value - Text to convert. 
 15+@constructor
 16+```
 17diff --git a/TODO.md b/TODO.md
 18index ad1d1c8..0f50539 100644
 19--- a/TODO.md
 20+++ b/TODO.md
 21@@ -125,7 +125,6 @@ For example 64 tbs to a qt.
 22 * SUBSTITUTE
 23 * T
 24 * TEXT
 25-* UPPER
 26 * VALUE
 27 * LINEST
 28 * LOGEST
 29diff --git a/dist/Formulas/AllFormulas.js b/dist/Formulas/AllFormulas.js
 30index 6856fe6..c4fac8f 100644
 31--- a/dist/Formulas/AllFormulas.js
 32+++ b/dist/Formulas/AllFormulas.js
 33@@ -146,6 +146,7 @@ exports.CONCATENATE = Text_1.CONCATENATE;
 34 exports.CONVERT = Text_1.CONVERT;
 35 exports.TRIM = Text_1.TRIM;
 36 exports.LOWER = Text_1.LOWER;
 37+exports.UPPER = Text_1.UPPER;
 38 var Date_1 = require("./Date");
 39 exports.DATE = Date_1.DATE;
 40 exports.DATEVALUE = Date_1.DATEVALUE;
 41diff --git a/dist/Formulas/Text.js b/dist/Formulas/Text.js
 42index 5fb591f..84e9562 100644
 43--- a/dist/Formulas/Text.js
 44+++ b/dist/Formulas/Text.js
 45@@ -431,3 +431,14 @@ var LOWER = function (value) {
 46     return text.toLowerCase();
 47 };
 48 exports.LOWER = LOWER;
 49+/**
 50+ * Converts text to uppercase.
 51+ * @param value - Text to convert.
 52+ * @constructor
 53+ */
 54+var UPPER = function (value) {
 55+    ArgsChecker_1.ArgsChecker.checkLength(arguments, 1, "UPPER");
 56+    var text = TypeConverter_1.TypeConverter.firstValueAsString(value);
 57+    return text.toUpperCase();
 58+};
 59+exports.UPPER = UPPER;
 60diff --git a/src/Formulas/AllFormulas.ts b/src/Formulas/AllFormulas.ts
 61index 06e1d6d..2e80054 100644
 62--- a/src/Formulas/AllFormulas.ts
 63+++ b/src/Formulas/AllFormulas.ts
 64@@ -152,7 +152,8 @@ import {
 65   CONCATENATE,
 66   CONVERT,
 67   TRIM,
 68-  LOWER
 69+  LOWER,
 70+  UPPER
 71 } from "./Text"
 72 import {
 73   DATE,
 74@@ -351,5 +352,6 @@ export {
 75   GROWTH,
 76   TRIMMEAN,
 77   SLOPE,
 78-  LOWER
 79+  LOWER,
 80+  UPPER
 81 }
 82\ No newline at end of file
 83diff --git a/src/Formulas/Text.ts b/src/Formulas/Text.ts
 84index 774d04d..c5d5437 100644
 85--- a/src/Formulas/Text.ts
 86+++ b/src/Formulas/Text.ts
 87@@ -451,6 +451,17 @@ var LOWER =  function (value) {
 88 };
 89 
 90 
 91+/**
 92+ * Converts text to uppercase.
 93+ * @param value - Text to convert.
 94+ * @constructor
 95+ */
 96+var UPPER = function (value) {
 97+  ArgsChecker.checkLength(arguments, 1, "UPPER");
 98+  var text = TypeConverter.firstValueAsString(value);
 99+  return text.toUpperCase();
100+};
101+
102 export {
103   ARABIC,
104   CHAR,
105@@ -459,5 +470,6 @@ export {
106   CONCATENATE,
107   CONVERT,
108   TRIM,
109-  LOWER
110+  LOWER,
111+  UPPER
112 }
113\ No newline at end of file
114diff --git a/tests/Formulas/TextTest.ts b/tests/Formulas/TextTest.ts
115index 84fab80..9adfc8b 100644
116--- a/tests/Formulas/TextTest.ts
117+++ b/tests/Formulas/TextTest.ts
118@@ -6,7 +6,8 @@ import {
119   SPLIT,
120   CONVERT,
121   TRIM,
122-  LOWER
123+  LOWER,
124+  UPPER
125 } from "../../src/Formulas/Text";
126 import * as ERRORS from "../../src/Errors";
127 import {
128@@ -162,3 +163,16 @@ test("LOWER", function(){
129     LOWER.apply(this, ["test", 5]);
130   }, ERRORS.NA_ERROR);
131 });
132+
133+
134+test("UPPER", function(){
135+  assertEquals(UPPER("test"), "TEST");
136+  assertEquals(UPPER(5), "5");
137+  assertEquals(UPPER(false), "FALSE");
138+  catchAndAssertEquals(function() {
139+    UPPER.apply(this, []);
140+  }, ERRORS.NA_ERROR);
141+  catchAndAssertEquals(function() {
142+    UPPER.apply(this, ["test", 5]);
143+  }, ERRORS.NA_ERROR);
144+});
145diff --git a/tests/SheetFormulaTest.ts b/tests/SheetFormulaTest.ts
146index 1483ee9..f275ae4 100644
147--- a/tests/SheetFormulaTest.ts
148+++ b/tests/SheetFormulaTest.ts
149@@ -696,7 +696,11 @@ test("Sheet SLOPE", function(){
150 });
151 
152 test("Sheet LOWER", function(){
153-  assertFormulaEquals('=LOWER("str")', "str");
154+  assertFormulaEquals('=LOWER("STR")', "str");
155+});
156+
157+test("Sheet UPPER", function(){
158+  assertFormulaEquals('=UPPER("str")', "STR");
159 });
160 
161 test("Sheet *", function(){