# Tag Info

Accepted

### Conversion between GB and MB (and KB)

You need to use 'better' units: UnitConvert[Quantity[1, "GiB"], "MiB"] Quantity[1024, "Mebibytes"] See explanation and definitions in https://en.wikipedia.org/...
• 137k

### Why are Quantity and Units inconsistent with regular Mathematica behavior?

Not a solution but an extended comment. You misunderstand the physical underpinnings of quantities and units. Every physical quantity has an inherent margin of error, even if it is very small (...
• 49.2k

### How to get Planck length in meters to 6 decimal places

You can use the relative uncertainty 1.1*10^-5 from the CODATA website you also referenced, and use Around to construct a value ...
• 8,834
Accepted

### How to have the units for energy show as kW h instead of h kW?

...
• 67.6k
Accepted

I resolved that using (Pi/4) * (180 Degree /Pi) Degree is a symbol similar to Pi, it ...
• 545

### Why is Mathematica messing with the time units in this simple equation?

First, regarding the substance of the calculation apart from Mathematica's unit handling: I think your input suggests some confusion about what you're trying to calculate. You say your working days ...
• 249

### Unit Discovery: Is this some sort of a sick joke?

A bit too long for a comment... My best guess is that WolframAlpha["earth's gravity", "MathematicaResult"] is simply rounding to too few digits. It returns ...
• 36.4k

### How to summon Acceleration due to Gravity in Mathematica 11?

Rightly or wrongly, if the unit specification is unknown, then WA is used behind the scenes to decide if it could be interpreted as a standard unit. You can see this with the error message provided: <...
• 131k
Accepted

### How to get Planck length in meters to 6 decimal places

The 4.652... at the end of 1.616255000000000066841324.652207380644164*^-35 should tell you that Mathematica knows this constant ...

### Why are Quantity and Units inconsistent with regular Mathematica behavior?

Is Mathematica V4 still for sale? This answer proposes less drastic solutions than moving back for Version 4. "Global" solution For the problems you encounter and approach you take one -- ...
• 37.9k
Accepted

### Bug recognizing "Wavenumbers" as a unit of energy?

As noted in the comments, inverse centimeters do not have dimensions of energy, unless you consider $h$ and $c$ to be dimensionless, which Mathematica has no way to tell that you are doing. (Wolfram|...
• 6,221
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### Change units in PlanetData["Earth", "Diameter"] from miles to km

You can use the UnitSystem option of EntityProperty, ...
• 69.6k
Accepted

### Plotting with units: emits error and gives incorrect plot

Look at what this gives: Evaluate[h[x]/Hinf] This is clearly wrong, you're adding x of no quantity to a quantity of ...
• 8,627
Accepted

### Working with degrees minutes and seconds without conversion

You may use either MixedRadixQuantity or Quantity with MixedMagnitude and ...
• 43.1k

• 27k
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### Inverse of UnitDimensions[]

You can use QuantityVariableCanonicalUnit: ...
• 30.5k

### Unitless quantities

Perhaps you can use "Unities" or "PureUnities". The unit "PureUnities" automatically gets turned into a number, while "Unities" needs a UnitConvert: ...
• 131k
Accepted

### How to add some bytes quantity?

Yes, so first we convert them into quantities: quantities = Interpreter[Restricted["Quantity", "Megabytes"]][st] Now we can eg add them with ...
• 13.2k

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