# Avoid issue while calculating with units?

**URL:** <https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222>\
**Category:** Questions\
**Tags:** physics, mathematica, units\
**Created:** [January 9, 2020, 4:01am UTC](https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222 "2020-01-09T04:01:25Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![fredkuttner](https://avatars.discourse-cdn.com/v4/letter/f/4da419/32.png) [@fredkuttner](https://community.wolfram.com/u/fredkuttner)\
**Post date:** [January 9, 2020, 4:01am UTC](https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222/1 "2020-01-09T04:01:25Z")

</div>

(in)

```
UnitConvert[Quantity[2.6, "Hours"], "Minutes"]

```

(out)

```
UnitConvert[QuantityUnits`Private`ToQuantity[QuantityUnits`Private`UnknownQuantity[2.6, "Hours"]], "Minutes"]    

```

I do not understand this output an I cannot find an answer anywhere in the documentation. Any help will be greatly appreciated.

---

<div class="post-metadata">

**Author:** ![rohitnamjoshi](https://avatars.discourse-cdn.com/v4/letter/r/f1d935/32.png) [@rohitnamjoshi](https://community.wolfram.com/u/rohitnamjoshi)\
**Post date:** [January 9, 2020, 2:18pm UTC](https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222/2 "2020-01-09T14:18:36Z")

</div>

Hi Fred,

This works fine for me

```
UnitConvert[Quantity[2.6, "Hours"], "Minutes"]
(* Quantity[156., "Minutes"] *)

```

on “12.0.0 for Mac OS X x86 (64-bit) (April 7, 2019)”. What version are you running?

---

<div class="post-metadata">

**Author:** ![fredkuttner](https://avatars.discourse-cdn.com/v4/letter/f/4da419/32.png) [@fredkuttner](https://community.wolfram.com/u/fredkuttner)\
**Post date:** [January 9, 2020, 3:58pm UTC](https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222/3 "2020-01-09T15:58:58Z")

</div>

That works for me now, too. All the calculations with units work for me now, but they didn’t yesterday. Not sure why.

---

<div class="post-metadata">

**Author:** ![fredkuttner](https://avatars.discourse-cdn.com/v4/letter/f/4da419/32.png) [@fredkuttner](https://community.wolfram.com/u/fredkuttner)\
**Post date:** [January 9, 2020, 4:04pm UTC](https://community.wolfram.com/t/avoid-issue-while-calculating-with-units/15222/4 "2020-01-09T16:04:06Z")

</div>

And much thanks for your answer.