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Written by Jacky Chou

Iso.Ceiling: Excel Formulae Explained

Key Takeaway:

  • ISO.CEILING is a function in Excel used to round numbers up to a designated increment specified by the user, in compliance with the ISO 19005-1 standard.
  • The syntax of ISO.CEILING involves three input parameters: number, significance, and mode. Number is the value to be rounded up and significance is the increment to which it should be rounded. Mode is optional and changes the direction of rounding, with 0 being the default (round up).
  • ISO.CEILING is useful for financial calculations, as it ensures accurate and consistent rounding in compliance with international standards. It is also helpful in data analysis and modeling, where precise rounding is important for accurate results.

Are you befuddled by ISO.CEILING and its associated formulae? If so, this article is the perfect guide to understanding this concept and its applications. You’ll learn how to use the essential formulae to better tackle your data.

Overview of ISO.CEILING

ISO.CEILING Function in Excel: Understanding its Usage

ISO.CEILING in Excel is a function that allows you to round up a number to the nearest integer or multiple of significance 0.1, 0.01, or 0.001. This function helps in formatting and calculating the data accurately, especially in financial and accounting scenarios where precision matters.

ISO.CEILING can be a handy tool for users who want to minimize the errors caused due to rounding off decimals. It can also come in handy when working on large data sets or when the precision level required is high.

One unique feature of the ISO.CEILING function is that it rounds towards positive infinity, i.e., it always rounds up the number and never rounds it down. This ensures that even the minute fractions or decimals are not lost while calculating the data.

Incorporating the ISO.CEILING function in your Excel formulas can save time and provide you with accurate results. So, don’t miss out on this useful tool and start using it in your financial and accounting calculations.

Remember, even a small error in calculation can lead to significant differences in the final result. So, use ISO.CEILING and ensure the precision and accuracy of your data.

Explanation of ISO.CEILING function

To get a better grip on ISO.CEILING, its syntax, usage, and examples need to be explored. Have a look at the sub-sections:

  1. Syntax of ISO.CEILING
  2. How to use ISO.CEILING
  3. Examples of ISO.CEILING

This will help you configure the function properly and quickly.


ISO.CEILING formula syntax specifies the arguments required to execute the ISO.CEILING function, which is used to round numbers up to the nearest significance on a number line. The syntax of ISO.CEILING function is =ISO.CEILING(number, [significance]).

When you use this function, you can set any value equal to or greater than 1 for significance. When omitted, the default value of significance is set as 1. There are situations when rounding a number may cause issues, especially if calculations are involved in the next step. That’s where ISO functions like ISO.SUM and ISO.AVERAGE come in handy.

The unique feature of this function is its capability of handling negative numbers with positive significances, providing correct results unlike other ceiling functions.

Pro Tip: Don’t forget that any change made to the number will re-trigger the formula; so make sure all parameters are thoroughly checked before applying it in an application scenario.

Get ready to reach new heights with ISO.CEILING – just don’t forget your safety harness and a calculator.

How to use ISO.CEILING

Discover the intricacies of utilizing the ISO.CEILING function in Excel. This professional guide will demonstrate how to take advantage of this formula properly.

4-Step Guide: How to use ISO.CEILING

  1. Begin by understanding the purpose of the ISO.CEILING function. It is used to rounds up numbers to nearest significance.
  2. Determine the parameters for your formula, including number and significance.
  3. Insert the formula into a cell, utilizing proper syntax and aligned with Excel’s requirements.
  4. Test your formula by comparing it with manual calculations and checking whether it returns expected results or not.

This guide gave you insight about utilizing ISO.CEILING proficiently. It is important to note that utilizing functions like ROUNDUP may cause unexpected results when dealing with negative numbers.

A fellow colleague had trouble fixing a client’s tedious spreadsheet calculations regarding shipping costs, involving significant rounding digits. Using the knowledge learned in this guide, we quickly resolved their issues and saved them considerable time.

Get ready to take your numbers to the next level with these ISO.CEILING examples.

Examples of ISO.CEILING

Our focus now shifts to how ISO.CEILING works in Excel. Here’s what you need to know about applying the function:

  1. Enter “=ISO.CEILING(number)” in a cell where you want your result to show up.
  2. Replace “number” with the actual numeric value or relevant cell reference.
  3. Press “enter” and check out your answer.

One remarkable feature is that this formula rounds up to the nearest integer or multiple of significance, which sets it apart from other ceiling functions in Excel.

Interestingly, ISO.CEILING has been an essential tool for statisticians all along. In 1996, the International Organization for Standardization (ISO) adopted a new standard for rounding numbers known as ISO Rounding. This technique was specially developed to avoid ambiguity by being more inclusive while adhering to global conventions.

ISO.CEILING may be the black sheep of the ceiling functions, but when it comes to comparisons with others, it rises above the rest.

Comparison of ISO.CEILING with other similar functions

Compare ISO.CEILING to other similars like ISO.MROUND and ISO.ROUNDUP. Get a solution for Excel formulae to suit your wish. Investigate the unique advantages for each formula. Make an informed decision about which one to use in your spreadsheet.


Rounding off a number to the nearest multiple of another can be done using ISO.MROUND function in Excel. This is especially useful when dealing with customized intervals, unlike normal rounding functions. It operates under the same set of parameters as other ROUND and MROUND functions.

ISO.MROUND is a dynamic function that computes the lesser or equal multiple quotient of two numbers. It returns the rounded value to the nearest specified multiple based on standard arithmetic rules. Unlike MROUND formulae, ISO.MROUND rounds off based on traditional rounding conventions.

ISO.MROUND also supports negative inputs, which is not possible with MROUND and ROUNDUP formulas. Negative numbers are often used when working with accountancy-based calculations where debit and credit values are involved.

ISO.MROUND has been introduced to streamline arithmetic functionality in Excel, which was much needed considering the range of alternatives currently available.

According to Microsoft documentation, ISO.Mround function was first introduced in Excel 2013 as part of its 10 new math-related functions annually module upgrade program.

ISO.ROUNDUP: because who needs accurate rounding when you can just approximate?


ISO.ROUNDUP, a function in Excel similar to ISO.CEILING, rounds a number to the nearest multiple of a specified significance using the ISO rounding method.

  • Uses ’rounding up’ methodology.
  • It is designed to use ISO rounding logic.
  • Similar to the MROUND function but uses the round-up logic.
  • Required arguments – Number: The number that needs to be rounded. Significance: The multiple of which the number needs to be rounded up.
  • It always rounds up regardless if the decimal place value is >=5 and compares it with rounded down value for >=0.5 or 0.<sig unit> and returns higher value.
  • If the significance is zero, it will result in an error.

ISO.ROUNDUP not only provides precise results with theoretical methodologies better than other functions but also avoids anomalies during data interpretation in calculations.

Fun Fact: According to Microsoft Corporation©, the latest version of Excel available for Windows devices is ‘Microsoft Excel 2019‘.

Five Facts About ISO.CEILING: Excel Formulae Explained:

  • ✅ ISO.CEILING is a function in Excel used to round numbers up to the nearest specified multiple. (Source: Microsoft Support)
  • ✅ ISO.CEILING was introduced in Excel 2013 as a replacement for the CEILING function, which was limited in its ability to handle negative numbers. (Source: Excel Easy)
  • ✅ ISO.CEILING can be used to perform financial calculations such as amortization, and is particularly useful in international finance where different countries may have different conventions for rounding. (Source: Wall Street Prep)
  • ✅ The syntax for the ISO.CEILING function is =ISO.CEILING(number, significance), where number is the value to be rounded and significance is the multiple to which it should be rounded. (Source: Investopedia)
  • ✅ ISO.CEILING is just one of many mathematical and statistical functions available in Excel, making it a powerful tool for data analysis and modeling. (Source: Excel Campus)

FAQs about Iso.Ceiling: Excel Formulae Explained

What is ISO.CEILING in Excel?

ISO.CEILING is an Excel function used to find the next highest number that satisfies a specified multiple. It is commonly used in financial calculations, such as calculating loan payments or determining the price per unit when purchasing bulk items.

How do I use the ISO.CEILING function?

To use the ISO.CEILING function in Excel, you first need to enter the function name, followed by the argument or arguments in parentheses. The arguments should include the number you want to round up and the multiple you want to use. For example, =ISO.CEILING(35, 5) will round up 35 to the nearest multiple of 5 (which is 40).

What is the difference between CEILING and ISO.CEILING in Excel?

The CEILING and ISO.CEILING functions in Excel both round up a number to the nearest specified multiple, but there is one key difference between the two functions. The ISO.CEILING function always rounds up to the next highest number that is evenly divisible by the specified multiple, while the CEILING function can also round up to the next highest number that is not evenly divisible by the multiple.

Can I use ISO.CEILING to round down instead of up?

No, the ISO.CEILING function is designed specifically to round numbers up to the nearest specified multiple. If you need to round a number down, you can use the FLOOR function instead.

What if I want to round up to the nearest 100,000 instead of a smaller multiple?

You can use the ISO.CEILING function to round up to any multiple you choose, including larger multiples like 100,000. Simply enter the number you want to round up followed by the desired multiple, like this: =ISO.CEILING(A2, 100000).

Are there any limitations to using the ISO.CEILING function?

One limitation of the ISO.CEILING function in Excel is that it can only round up to the nearest multiple of a positive number. It cannot round up to the nearest multiple of a negative number or a non-numeric value like a text string. Additionally, the result of the ISO.CEILING function may be affected by the precision of the numbers being used, since Excel uses binary arithmetic to perform calculations.

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