Unit conversion from cubic meters to US gallons seems off

Issue #922 resolved

Former user created an issue 2019-08-01

Using built in units:

(meter ^ 3) / gallon_US
= 264.20079260237780713342

Using NIST handbook values, 61023.74in^3 per m^3, 231in^3 per gal

61023.74/231
= 264.17203463203463203463

Comments (7)

Helder Correia repo owner
OP’s point looks correct on first sight. Needs further investigation.
- 2019-08-01T20:14:05+00:00
Helder Correia repo owner
- changed component to mathengine
- changed milestone to 1.0
- 2019-08-01T20:14:27+00:00
Pol Welter
It seems like I forgot to type all the digits...
```
UNIT_CACHE(US_gallon,           HNumber("3.785") * liter())
```
should have been
```
UNIT_CACHE(US_gallon,           HNumber("3.785411784") * liter())
```
Link to the offending source

For the record though: 1 m³ = 61023.74 in³ is not exact. The exact definition comes from 1 in = 2.54 cm.
- 2019-08-02T08:05:52+00:00
Helder Correia repo owner
- assigned issue to
  
  Pol Welter
- 2019-08-02T16:01:08+00:00
Helder Correia repo owner
Issue ~~#934~~ was marked as a duplicate of this issue.
- 2019-09-12T21:46:41+00:00
Pol Welter
- changed status to resolved
Fix issue ~~#922~~

→ <<cset b955acfee1de>>
- 2019-09-13T06:53:51+00:00
Pol Welter
Fixed it now. Sorry, kinda lost track of it.
- 2019-09-13T06:54:22+00:00
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