1diff --git a/DOCS.md b/DOCS.md
  2index 8783f4d..c58e161 100644
  3--- a/DOCS.md
  4+++ b/DOCS.md
  5@@ -482,6 +482,16 @@
  6 @returns {number} 
  7 @constructor
  8 ```
  9+
 10+### NOMINAL 
 11+
 12+```
 13+  Calculates the yearly nominal interest rate, given the effective rate and the number of compounding periods per year. 
 14+@param rate - The effective interest rate. 
 15+@param periods - The number of periodic interest payments per year. 
 16+@returns {number} 
 17+@constructor
 18+```
 19 ## Info
 20 
 21 
 22diff --git a/TODO.md b/TODO.md
 23index bdd2605..73f0ca7 100644
 24--- a/TODO.md
 25+++ b/TODO.md
 26@@ -143,7 +143,6 @@ For example 64 tbs to a qt.
 27 * IPMT
 28 * IRR
 29 * MIRR
 30-* NOMINAL
 31 * PPMT - Similar to PMT, which is already written.
 32 * PRICE
 33 * PRICEDISC
 34diff --git a/dist/Formulas/AllFormulas.js b/dist/Formulas/AllFormulas.js
 35index dac8243..7932146 100644
 36--- a/dist/Formulas/AllFormulas.js
 37+++ b/dist/Formulas/AllFormulas.js
 38@@ -114,6 +114,7 @@ exports.SYD = Financial_1.SYD;
 39 exports.SLN = Financial_1.SLN;
 40 exports.NPV = Financial_1.NPV;
 41 exports.NPER = Financial_1.NPER;
 42+exports.NOMINAL = Financial_1.NOMINAL;
 43 var Statistical_1 = require("./Statistical");
 44 exports.AVERAGE = Statistical_1.AVERAGE;
 45 exports.AVERAGEA = Statistical_1.AVERAGEA;
 46diff --git a/dist/Formulas/Financial.js b/dist/Formulas/Financial.js
 47index 8ed7be2..8d3fffd 100644
 48--- a/dist/Formulas/Financial.js
 49+++ b/dist/Formulas/Financial.js
 50@@ -526,3 +526,21 @@ var NPER = function (rate, payment, present, future, type) {
 51     return logNumDen / div;
 52 };
 53 exports.NPER = NPER;
 54+/**
 55+ * Calculates the yearly nominal interest rate, given the effective rate and the number of compounding periods per year.
 56+ * @param rate - The effective interest rate.
 57+ * @param periods - The number of periodic interest payments per year.
 58+ * @returns {number}
 59+ * @constructor
 60+ */
 61+var NOMINAL = function (rate, periods) {
 62+    ArgsChecker_1.ArgsChecker.checkLength(arguments, 2, "NOMINAL");
 63+    rate = TypeConverter_1.TypeConverter.firstValueAsNumber(rate);
 64+    periods = Math.round(TypeConverter_1.TypeConverter.firstValueAsNumber(periods));
 65+    if (periods < 1) {
 66+        throw new Errors_1.NumError("Function NOMINAL parameter 2 value is " + periods
 67+            + ". It should be greater than or equal to 1.");
 68+    }
 69+    return (Math.pow(rate + 1, 1 / periods) - 1) * periods;
 70+};
 71+exports.NOMINAL = NOMINAL;
 72diff --git a/src/Formulas/AllFormulas.ts b/src/Formulas/AllFormulas.ts
 73index e8fac3f..c443a59 100644
 74--- a/src/Formulas/AllFormulas.ts
 75+++ b/src/Formulas/AllFormulas.ts
 76@@ -117,7 +117,8 @@ import {
 77   SYD,
 78   SLN,
 79   NPV,
 80-  NPER
 81+  NPER,
 82+  NOMINAL
 83 } from "./Financial";
 84 import {
 85   AVERAGE,
 86@@ -373,5 +374,6 @@ export {
 87   SYD,
 88   SLN,
 89   NPV,
 90-  NPER
 91+  NPER,
 92+  NOMINAL
 93 }
 94\ No newline at end of file
 95diff --git a/src/Formulas/Financial.ts b/src/Formulas/Financial.ts
 96index 7f00899..5d343d7 100644
 97--- a/src/Formulas/Financial.ts
 98+++ b/src/Formulas/Financial.ts
 99@@ -535,6 +535,23 @@ var NPER = function (rate, payment, present, future?, type?) {
100   return  logNumDen / div;
101 };
102 
103+/**
104+ * Calculates the yearly nominal interest rate, given the effective rate and the number of compounding periods per year.
105+ * @param rate - The effective interest rate.
106+ * @param periods - The number of periodic interest payments per year.
107+ * @returns {number}
108+ * @constructor
109+ */
110+var NOMINAL =  function (rate, periods) {
111+  ArgsChecker.checkLength(arguments, 2, "NOMINAL");
112+  rate = TypeConverter.firstValueAsNumber(rate);
113+  periods = Math.round(TypeConverter.firstValueAsNumber(periods));
114+  if (periods < 1) {
115+    throw new NumError("Function NOMINAL parameter 2 value is " + periods
116+        + ". It should be greater than or equal to 1.");
117+  }
118+  return (Math.pow(rate + 1, 1 / periods) - 1) * periods;
119+};
120 
121 export {
122   ACCRINT,
123@@ -550,5 +567,6 @@ export {
124   SYD,
125   SLN,
126   NPV,
127-  NPER
128+  NPER,
129+  NOMINAL
130 }
131\ No newline at end of file
132diff --git a/tests/Formulas/FinancialTest.ts b/tests/Formulas/FinancialTest.ts
133index 0ea0987..862bfa6 100644
134--- a/tests/Formulas/FinancialTest.ts
135+++ b/tests/Formulas/FinancialTest.ts
136@@ -12,7 +12,8 @@ import {
137   SYD,
138   SLN,
139   NPV,
140-  NPER
141+  NPER,
142+  NOMINAL
143 } from "../../src/Formulas/Financial";
144 import {
145   DATE
146@@ -343,3 +344,18 @@ test("NPER", function() {
147     NPER.apply(this, [0.04, -50, 1000, 2000, 0, 22]);
148   }, ERRORS.NA_ERROR);
149 });
150+
151+
152+test("NOMINAL", function() {
153+  assertEquals(NOMINAL(0.8, 12), 0.6024201620105654);
154+  assertEquals(NOMINAL(0.9, 2), 0.7568097504180442);
155+  catchAndAssertEquals(function() {
156+    NOMINAL(0.04, -2);
157+  }, ERRORS.NUM_ERROR);
158+  catchAndAssertEquals(function() {
159+    NOMINAL.apply(this, [0.04, -50, 44]);
160+  }, ERRORS.NA_ERROR);
161+  catchAndAssertEquals(function() {
162+    NOMINAL.apply(this, [0.04]);
163+  }, ERRORS.NA_ERROR);
164+});
165\ No newline at end of file
166diff --git a/tests/SheetFormulaTest.ts b/tests/SheetFormulaTest.ts
167index 3810e5a..5880ead 100644
168--- a/tests/SheetFormulaTest.ts
169+++ b/tests/SheetFormulaTest.ts
170@@ -735,6 +735,10 @@ test("Sheet NPER", function(){
171   assertFormulaEquals('=NPER(0.04, 100, 4000, 0, 0)', -24.362418941571317);
172 });
173 
174+test("Sheet NOMINAL", function(){
175+  assertFormulaEquals('=NOMINAL(0.8, 12)', 0.6024201620105654);
176+});
177+
178 test("Sheet *", function(){
179   assertFormulaEquals('= 10 * 10', 100);
180   assertFormulaEquals('= 10 * 0', 0);