1diff --git a/DOCS.md b/DOCS.md
  2index bae3d13..bb9fb93 100644
  3--- a/DOCS.md
  4+++ b/DOCS.md
  5@@ -1369,3 +1369,12 @@
  6 @returns {number} 
  7 @constructor TODO: Looking up units is not efficient at all. We should use an object instead of iterating through an array.
  8 ```
  9+
 10+### TRIM 
 11+
 12+```
 13+  Removes leading and trailing spaces in a specified string. 
 14+@param value - The string or reference to a cell containing a string to be trimmed. 
 15+@returns {string} 
 16+@constructor
 17+```
 18diff --git a/TODO.md b/TODO.md
 19index 2d2efd2..2d890cb 100644
 20--- a/TODO.md
 21+++ b/TODO.md
 22@@ -20,6 +20,9 @@ For example the CHOOSE formula can't be parsed: `=CHOOSE(2, [1, 2, 3])`.
 23 For example 64 tbs to a qt.
 24 
 25 
 26+### Fix documentation regular expression, it is butchering URLs.
 27+
 28+
 29 ### Formulas to write
 30 
 31 * ERROR.TYPE
 32@@ -143,7 +146,6 @@ For example 64 tbs to a qt.
 33 * SUBSTITUTE
 34 * T
 35 * TEXT
 36-* TRIM
 37 * UPPER
 38 * VALUE
 39 * FREQUENCY
 40diff --git a/dist/Formulas/AllFormulas.js b/dist/Formulas/AllFormulas.js
 41index 0c33a7a..7e89104 100644
 42--- a/dist/Formulas/AllFormulas.js
 43+++ b/dist/Formulas/AllFormulas.js
 44@@ -121,6 +121,7 @@ exports.CODE = Text_1.CODE;
 45 exports.SPLIT = Text_1.SPLIT;
 46 exports.CONCATENATE = Text_1.CONCATENATE;
 47 exports.CONVERT = Text_1.CONVERT;
 48+exports.TRIM = Text_1.TRIM;
 49 var Date_1 = require("./Date");
 50 exports.DATE = Date_1.DATE;
 51 exports.DATEVALUE = Date_1.DATEVALUE;
 52diff --git a/dist/Formulas/Text.js b/dist/Formulas/Text.js
 53index 2f3bdef..b7b92a3 100644
 54--- a/dist/Formulas/Text.js
 55+++ b/dist/Formulas/Text.js
 56@@ -408,3 +408,15 @@ var CONVERT = function (value, startUnit, endUnit) {
 57     return n * from[6] * from_multiplier / (to[6] * to_multiplier);
 58 };
 59 exports.CONVERT = CONVERT;
 60+/**
 61+ * Removes leading and trailing spaces in a specified string.
 62+ * @param value - The string or reference to a cell containing a string to be trimmed.
 63+ * @returns {string}
 64+ * @constructor
 65+ */
 66+var TRIM = function (value) {
 67+    ArgsChecker_1.ArgsChecker.checkLength(arguments, 1, "TRIM");
 68+    var text = TypeConverter_1.TypeConverter.valueToString(value);
 69+    return text.trim();
 70+};
 71+exports.TRIM = TRIM;
 72diff --git a/src/Formulas/AllFormulas.ts b/src/Formulas/AllFormulas.ts
 73index b3d82ce..a3132c7 100644
 74--- a/src/Formulas/AllFormulas.ts
 75+++ b/src/Formulas/AllFormulas.ts
 76@@ -126,7 +126,8 @@ import {
 77   CODE,
 78   SPLIT,
 79   CONCATENATE,
 80-  CONVERT
 81+  CONVERT,
 82+  TRIM
 83 } from "./Text"
 84 import {
 85   DATE,
 86@@ -301,5 +302,6 @@ export {
 87   NE,
 88   NA,
 89   CHOOSE,
 90-  GCD
 91+  GCD,
 92+  TRIM
 93 }
 94\ No newline at end of file
 95diff --git a/src/Formulas/Text.ts b/src/Formulas/Text.ts
 96index 93aef44..2670cb2 100644
 97--- a/src/Formulas/Text.ts
 98+++ b/src/Formulas/Text.ts
 99@@ -425,11 +425,26 @@ var CONVERT = function (value, startUnit, endUnit) {
100   return n * from[6] * from_multiplier / (to[6] * to_multiplier);
101 };
102 
103+
104+/**
105+ * Removes leading and trailing spaces in a specified string.
106+ * @param value - The string or reference to a cell containing a string to be trimmed.
107+ * @returns {string}
108+ * @constructor
109+ */
110+var TRIM = function (value) {
111+  ArgsChecker.checkLength(arguments, 1, "TRIM");
112+  var text = TypeConverter.valueToString(value);
113+  return text.trim();
114+};
115+
116+
117 export {
118   ARABIC,
119   CHAR,
120   CODE,
121   SPLIT,
122   CONCATENATE,
123-  CONVERT
124+  CONVERT,
125+  TRIM
126 }
127\ No newline at end of file
128diff --git a/tests/Formulas/TextTest.ts b/tests/Formulas/TextTest.ts
129index 7086557..e2d36d8 100644
130--- a/tests/Formulas/TextTest.ts
131+++ b/tests/Formulas/TextTest.ts
132@@ -4,7 +4,8 @@ import {
133   CODE,
134   CONCATENATE,
135   SPLIT,
136-  CONVERT
137+  CONVERT,
138+  TRIM
139 } from "../../src/Formulas/Text";
140 import * as ERRORS from "../../src/Errors";
141 import {
142@@ -134,3 +135,16 @@ test("ARABIC", function(){
143     ARABIC(10);
144   }, ERRORS.VALUE_ERROR);
145 });
146+
147+
148+test("TRIM", function(){
149+  assertEquals(TRIM(" test  "), "test");
150+  assertEquals(TRIM(5), "5");
151+  assertEquals(TRIM(false), "FALSE");
152+  catchAndAssertEquals(function() {
153+    TRIM.apply(this, []);
154+  }, ERRORS.NA_ERROR);
155+  catchAndAssertEquals(function() {
156+    TRIM.apply(this, ["test", 5]);
157+  }, ERRORS.NA_ERROR);
158+});
159diff --git a/tests/SheetFormulaTest.ts b/tests/SheetFormulaTest.ts
160index c845bb1..6e61b5a 100644
161--- a/tests/SheetFormulaTest.ts
162+++ b/tests/SheetFormulaTest.ts
163@@ -163,6 +163,10 @@ test("Sheet COS", function(){
164   assertFormulaEquals("=COS(PI())", -1);
165 });
166 
167+test("Sheet TRIM", function(){
168+  assertFormulaEquals("=TRIM(' trim ')", "trim");
169+});
170+
171 test("Sheet COSH", function(){
172   assertFormulaEquals("=COSH(PI())", 11.591953275521522);
173 });