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Quantity Rounding Precision

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Posted on by MattinWi

We have some lot tracked item numbers that we use for custom projects. So to accommodate this, we have many different UoMs, but they are all set to 1:1 for the conversion rate. SF,LF,EA,CF for example. There is never any actual need for conversion as we produce to a lot number specific to a job/UoM.

Base unit of measure is EA. Quantity Rounding Precision is set to .01. We are able to enter EA to 2 decimal places fine, we can enter LF to 5 decimal places, however, SF and CF give us the error of "two small precision" when trying to enter any decimals. We never had this kind of issues with GP doing this. Looking how we can get this resolved.

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Dynamics 365 Business Central

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YUN ZHU 101,126 Super User 2026 Season 1 on at

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Hi, hope the following helps.

Quantity Rounding Precision

Rounding for base unit of measure (Quantity Rounding Precision)

https://yzhums.com/17771/

Thanks.

ZHU

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MattinWi 22 on at

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Thanks for your reply, but I've seen this post and it does not apply, in fact according to that post, my issue should not exist. I should be able to put in 23.5 CF because qty rounding precision is just a base UoM setting

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Dhiren Nagar 2,886 Super User 2026 Season 1 on at

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Hi,

On the Item card, find action of Unit of Measure. It will open Item Unit of Measure table. This UOMs are specific to this Item.

Now if you click on any record on that page in the bottom right you will see a field of Rounding precision, that is what you need to setup for each of the UOM.

If you set up it as 0, it will take 5 decimal. 0.01 for 2 decimals and 1 for no deicmal allowed.

On transaction if you try to enter more decimal then what is allowed for that UOM it will throw error. You can correct it from Item unit of measire table but make sure there is no inventory or warehouse or other documents open with that UOM or it wi not allow to change.

✅ Tick the checkbox below to mark the answer as verified, if it helped resolve your question.

Regards,

Dhiren.

LinkedIn - https://www.linkedin.com/in/ca-dhiren-nagar-5079081b2/

Blog - https://dhirennagar.blogspot.com/

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OussamaSabbouh 16,372 Super User 2026 Season 1 on at

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Hello,

This is a rounding precision validation against the Base UoM (EA), not a UoM conversion issue; Business Central always validates quantity after converting to Base Unit, so since EA has Quantity Rounding Precision = 0.01, any 1:1 UoM (like SF or CF) must still respect that precision after conversion, which is why some allow decimals and others throw the “lower precision than expected” error; the clean fix is to increase the Item’s Quantity Rounding Precision (for example to 0.00001) so all UoMs can accept the decimal precision you need, but test carefully since this affects inventory calculations system-wide.

Regards,
Oussama Sabbouh

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MattinWi 22 on at

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Thanks for the replies - but in all actuality - the problem is that BC has Quality Rounding Precision fields per UoM, but they are not displayed. Somehow they were not all 0.01 like the base somehow. Not sure as these were manually entered items and UoMs. You can't get to these fields via personalization and takes development. As you can see, these were the settings on the backend, somehow.

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Dhiren Nagar 2,886 Super User 2026 Season 1 on at

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Hi,

As mentioned in my previous replies, the field is visible and can be setup in the Item Unit of Measure tab from Item card.

Steps - Open Item card, Find action named "Unit of Measures", open it, in the next page you will see all UOM, check the bottom right corner of the screen you will find Qty. rounding precision field, modify it as per your requirement.

✅ Tick the checkbox below to mark the answer as verified, if it helped resolve your question.

Regards,

Dhiren.

LinkedIn - https://www.linkedin.com/in/ca-dhiren-nagar-5079081b2/

Blog - https://dhirennagar.blogspot.com/

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