Defining and Editing Constants
You can define constants by creating constants text files which is described below, or you can use the built in Napier constants editor. To work with the constants, tap the Tools menu entry and select Edit Constants.
This will display the constants editing dialog which allows you to add new constants, edit existing ones, reorder them, and delete ones you don’t want. When it first comes up you need to select the Type of constant, that is, which function set button it is under (the default set of constants is under the Misc button).
Here are the parts of the constant definition dialog box:
You can select the function type using the type dropdown and will get a list of the existing constants under that button, then from the middle dropdown, you can select the one to work on.
To create a new constant, just fill in the Name, Value and Help text fields and tap the Insert button. This will drop down the list of existing constants in the selected type from which you can select the one to insert your new constant before. You can change the type by just dropping down the type list and selecting a new one. To put the constant at the end of the list, select the bottom-most entry which is named <END>.
To edit an existing constant, select the one to edit which will show you the existing field values. Edit them, then tap the Replace button which will replace the one you selected with the new one.
To delete a constant, just select a constant, then tap the Delete button. Note that this doesn’t clear the fields which define that constant, so if you want to insert it in another location, essentially doing a move operation, just tap the Insert button and select the new location for it.
Built In Conversion Constants
These are factors used to convert from one unit to another, e.g. kilometers to miles. The built in conversions are under the Misc dropdown key, but if you define your own functions, they can be loaded under any of the dropdowns.
To use them, just select the constant for the units you have. If you have kilometers and want miles, multiply the value by Km2Mi. If you have miles, divide the miles value by Km2Mi to get kilometers. You can load your own set of constants using the file read functions discussed below.
|
Ac2Ft |
|
Ct2Gm |
|
Lk2In |
|
|
|
43560 |
|
0.2 |
|
7.92 |
|
|
Ac2Ft: sqFt per acre |
|
Ct2Gm: gm per caret |
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Lk2In: in per surveyor link |
|
Ac2M |
|
Dl2Gm |
|
Lt2Qt |
|
|
|
4046.9 |
|
1.65e-024 |
|
1.0567 |
|
|
Ac2M: sqM per acre |
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Dl2Gm: gm per Dalton |
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Lt2Qt: quarts per liter |
|
Ac2H |
|
Dr2Oz |
|
Lt2In |
|
|
|
0.40469 |
|
0.125 |
|
61.025 |
|
|
Ac2H: hectares per acre |
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Dr2Oz: oz per fl dram |
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Lt2In: cuIn per liter |
|
Ag2In |
|
Dy2Lb |
|
Lt2Oz |
|
|
|
3.937e-009 |
|
2.2481e-006 |
|
33.815 |
|
|
Ag2In: in per angstrom |
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Dy2Lb: lbs per dyne |
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Lt2Oz: oz per liter |
|
AO2Oz |
|
Fr2Mi |
|
Ly2Km |
|
|
|
1.0971 |
|
0.125 |
|
9.46e+012 |
|
|
AO2Oz: oz per apoth oz |
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Fr2Mi: mi per furlong |
|
Ly2Km: km per light year |
|
AP2Lb |
|
Fp2HP |
|
Ly2Mi |
|
|
|
14.696 |
|
3.0303e-005 |
|
5.878e+012 |
|
|
AP2Lb: atm press in lbs/sqIn |
|
Fp2HP: hp per ft lb/min |
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Ly2Mi: mi per light year |
|
AP2Kg |
|
Fp2KW |
|
M2In |
|
|
|
10332 |
|
2.2597e-005 |
|
39.37 |
|
|
AP2Kg: atm press in kg/sqM |
|
Fp2KW: kwatt per ft lb/min |
|
M2In: in per meter |
|
AP2Hg |
|
Ft2Ga |
|
M2Ft |
|
|
|
76 |
|
7.481 |
|
3.2808 |
|
|
AP2Hg: atm press in cm Hg |
|
Ft2Ga: gal per cuFt |
|
M2Ft: ft per meter |
|
Au2Km |
|
Gi2Oz |
|
Mc2In |
|
|
|
1.495e+008 |
|
4 |
|
3.937e-005 |
|
|
Au2Km: km per astro unit |
|
Gi2Oz: oz per gill |
|
Mc2In: in per micron |
|
BG2Ga |
|
Gm2Oz |
|
Mg2Oz |
|
|
|
1.2009 |
|
0.035274 |
|
3.5274e-005 |
|
|
BG2Ga: gals per Imp gal |
|
Gm2Oz: oz per gram |
|
Mg2Oz: oz per mg |
|
BT2KW |
|
Gr2Oz |
|
Mi2Ft |
|
|
|
0.000293 |
|
0.0022857 |
|
5280 |
|
|
BT2KW: kilowatt hrs per BTU |
|
Gr2Oz: oz per grain |
|
Mi2Ft: ft per mi |
|
BT2HP |
|
Hd2In |
|
NM2Mi |
|
|
|
0.00039292 |
|
4 |
|
0.86836 |
|
|
BT2HP: horse power per BTU |
|
Hd2In: in per hand |
|
NM2Mi: mi per nautical mi |
|
BT2Jl |
|
Hh2Ga |
|
Pk2Bu |
|
|
|
1054.6 |
|
63 |
|
0.25 |
|
|
BT2Jl: joules per BTU |
|
Hh2Ga: gals per hogshead |
|
Pk2Bu: bushels per peck |
|
Bu2Ft |
|
HP2BT |
|
Ps2Km |
|
|
|
1.2444 |
|
0.70696 |
|
3.084e+013 |
|
|
Bu2Ft: cuFt per bushel |
|
HP2BT: BTU/sec per hp |
|
Ps2Km: km per parsec |
|
C2M |
|
HP2Fp |
|
Pt2In |
|
|
|
2.9979e+008 |
|
550 |
|
0.01389 |
|
|
C2M: light vel in M/sec |
|
HP2Fp: ftlbs/sec per hp(elect) |
|
Pt2In: in per point |
|
C2Mi |
|
In2Cm |
|
Qt2In |
|
|
|
1.8628e+005 |
|
2.54 |
|
57.749 |
|
|
C2Mi: light vel miles/sec |
|
In2Cm: cm per inch |
|
Qt2In: cuIn per quart |
|
Cb2In |
|
In2Oz |
|
Rd2Ft |
|
|
|
18 |
|
0.5541 |
|
16.5 |
|
|
Cb2In: in per cubit |
|
In2Oz: oz per cuIn |
|
Rd2Ft: ft per surveyor rod |
|
Cc2In |
|
Kg2Lb |
|
SD2Sc |
|
|
|
0.061023 |
|
2.2046 |
|
86164 |
|
|
Cc2In: cuIn per cc |
|
Kg2Lb: lbs per kg |
|
SD2Sc: secs per sidereal day |
|
Cc2Oz |
|
Km2Ft |
|
St2Lb |
|
|
|
0.033814 |
|
3280.8 |
|
14 |
|
|
Cc2Oz: oz per cc |
|
Km2Ft: ft per km |
|
St2Lb: lbs per stone |
|
Ch2Ft |
|
Km2Mi |
|
Tn2Kg |
|
|
|
66 |
|
0.62137 |
|
907.18 |
|
|
Ch2Ft: ft per surveyor chain |
|
Km2Mi: mi per km |
|
Tn2Kg: kg per US ton |
|
Cm2In |
|
Lg2Mi |
|
Yr2Dy |
|
|
|
0.3937 |
|
3 |
|
365.24 |
|
|
Cm2In: in per cm |
|
Lg2Mi: mi per league |
|
Yr2Dy: days per year solar |