How to insert random (integer) numbers between two numbers without repeats in Excel?
Do you need to insert random numbers in Microsoft Excel? There are several methods to insert random numbers in a range as follows:
Insert random numbers by formulas
Insert random numbers with specified decimal places by VBA
Insert random integer numbers/dates/times without repeats/duplicates
Insert random numbers between two numbers with RAND function and RANDBETWEEN formulas
This method will apply the RAND function and RANDBETWEEN function to insert random numbers between two numbers into a specified range in Excel. Please view below formulas:
| Formula | Description (Result) |
| =RAND() | A random number between 0 and 1 (varies) |
| =RAND()*100 | A random number between 0 and 100 (varies) |
| =RANDBETWEEN(low, high) | A random integral number between two given integer numbers, such as RANDBETWEEN(50, 100). |
See below screenshots:
| Random numbers between 0 and 1 =RAND()  | Random numbers between 0 and 100 =RAND()*100  | Random integer numbers between 50 and 100 =RANDBETWEEN(50, 100)  |
Insert random numbers between two numbers with specified decimal places by VBA
Below VBA can help you insert any random integer numbers or random numbers with given decimal places into a specified range in Excel. Please do as follows:
1. Hold down the ALT + F11 keys, and it opens the Microsoft Visual Basic for Applications window.
2. Click Insert > Module, and paste the following code in the Module window.
Public Function RandomNumbers(Num1 As Long, Num2 As Long, Optional Decimals As Integer)
'Update20131113
Application.Volatile
Randomize
If IsMissing(Decimals) Or Decimals = 0 Then
RandomNumbers = Int((Num2 + 1 - Num1) * Rnd + Num1)
Else
RandomNumbers = Round((Num2 - Num1) * Rnd + Num1, Decimals)
End If
End Function
3. Save and close the code, then in a blank cell, input this formula =RandomNumbers(X,Y,Z), X indicates the lower limit of the numbers, Y indicates the higher limit of the numbers, and Z is the specified decimal places of random numbers.
For example, I want to generate some whole numbers between 50 and 1000, I can insert this formula =randomnumbers (50,1000,0); and insert random numbers between 50 and 100 with 2 decimal places with this formula =randomnumbers (50,100,2). See below screenshots:
Insert random whole numbers / dates / time without duplicates by Kutools for Excel
Kutools for Excel's Insert Random Data makes it possible to insert random integral numbers between two numbers without duplicates into selected range in Excel. Please do as follows:
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1. Select the range you want to insert random integer numbers, and click Kutools > Insert > Insert Random Data, see screenshot:
2. In the Insert Random Data dialog box, (1) click Integer tab, (2) In the From and To boxes type the number range you will generate random whole numbers between, (3) check the Unique Values option, (4) and click the Ok button. See screenshot:
This fantastic Insert Random Data feature also supports to insert random dates without repeats, random time without duplicates, random characters, and random data from certain custom list without repeats as well.
Insert random dates (excluding weekends) without repeats by Kutools for Excel
Insert random time data without repeats by Kutools for Excel
Insert random characters with specified string length by Kutools for Excel
Insert random data from certain custom list without repeats by Kutools for Excel
Related article:
Generate random character strings in a range
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