Power Apps: Round Function

The Round function performs the mathematical round of a number to a specific number of decimal places. It uses the rules defined “Half Round-Up” where it rounds up if the last digit is 5 or more and low if not. For example, Round(3.14159,4) will return 3.1416 and Round(3.14159,2) will return 3.14.

Limitations

1. Convert multi-column tables before being able to use the Round function.
2. If you want to round always up or down, you need to use the alternative functions RoundUp or RoundDown.

Recommendations:

1. Unless you want a mathematically correct rounding, I recommend using, for clarity, RoundUp or RoundDown. By doing this, you have a clear direction of the rounding.
2. You can round an entire table (single column). The Round function will return a new table with the rounded values.
3. Only use rounding when you want to present a lot of information in a compact view. For calculations ensure you’re using the original values.
4. Be careful when rounding to get an integer number. Always think if the rounded value will make sense, otherwise, keep at least one decimal place to provide a little bit more context to the user. To do so just do Round(“3.14”,0) .
5. Use any of the round functions (Round, RoundDown or RoundUp) instead of Text when displaying the information. You can get the same result as above just by using, Text((3.14159),"[$-en-GB]#0")but you’d be losing clarity in the formula and not in control in the rounding direction. Use this formula only if you want a strict display of the result like keeping the right-hand zeros, for example.
6. You can perform arithmetic operations within the function. For example,Round((3.14159/4),2) returns 0.79.
7. Arithmetic operations can contain variables but, if the value is not a number, the result will be empty and not an error, so be careful when setting the variables.

Localization

1. Please note that formulas may have localization-based differences. For example, you should write Round("3.14",2) with “,” separating each of the arguments, but if your localization is Portugal, you should use “;” instead.

Sources:

Round, RoundDown, and RoundUp functions in Power Apps

Back to the PowerApps Function Reference

Featured Image by Kevin Crosby on Unsplash

UPDATED:
2020-09-03: My thanks to Larry for spotting a typo in this article.