Conversions

Machine Related Operations

• Conversions
  • Centigrade to Fahrenheit
  • Fahrenheit to centigrade
  • Feet and inches to centimeters
  • Centimeters to feet and inches
  • Gallons to liters
  • Liters to gallons
  • Miles to kilometers
  • Kilometers to miles
  • Pounds to kilograms
  • Kilograms to pounds

Source: HP-45 Applications Book (HP 00045-90320 Rev. B Reorder 00045-66001, Dec 1974)

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Conversions

Repetitive use of formulas with two constants

Note:
The technique used here is storing constants (in register A, B, ...), after which the formulas can be used repeatedly.

Centigrade to Fahrenheit

Formula:

a °C → b °F

where

b = ⁹⁄₅·a + 32

Examples:

a	b
-30	-22.00
0	32.00
28	82.40
100	212.00
539	1002.20

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	a	→°F	b	Stop. For new case,
				go to 1

Fahrenheit to centigrade

Formula:

b °F → a °C

where

a = ⁵⁄₉·b - 32

Examples:

b	a
-460	-273.33
-40	-40.00

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	b	→°C	a	Stop. For new case,
				go to 1

Feet and inches to centimeters

Formula:

1 foot = 12 inches
1 inch = 2.54 cm

Examples:

4'8" = 142.24 cm
5'5" = 165.10 cm
6'3" = 190.50 cm

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1		1 2 ENTER ENTER ENTER
2
3	Ft	×
4	In	+ →cm	Cm	Stop. For new case,
				go to 2

Centimeters to feet and inches

Examples:

164 cm = 5'4.57"
180 cm = 5'10.87"

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1		1 2 STO A
2		→cm 1/x ENTER ENTER
3		ENTER
4
5	Cm	× ENTER INTG 6'IP	Feet
6		- RCL A ×	Inches	Stop. For new case,
				go to 4

Gallons to liters

Formula:

1 gallon = 3.785411784 liters

Notation:

gal = gallons
ltr = liters

Examples:

5.3 gal = 20.06 ltr
61.55 gal = 232.99 ltr

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	gal	→l	ltr	Stop. For new case,
				go to 1

Liters to gallons

Notation:

gal = gallons
ltr = liters

Examples:

20 ltr = 5.28 gal
232.99 ltr = 61.55 gal

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	ltr	→gal	gal	Stop. For new case,
				go to 1

Miles to kilometers

Formula:

1 mile = 1.609344 kilometers

Notation:

mi = miles
km = kilometers

Examples:

40 mi = 64.37 km
12.34 mi = 19.86 km

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	mi	→km	km	Stop. For new case,
				go to 1

Kilometers to miles

Notation:

mi = miles
km = kilometers

Examples:

65 km = 40.39 mi
24.44 km = 15.19 mi

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	km	→MILE	mi	Stop. For new case,
				go to 1

Pounds to kilograms

Formula:

1 pound = 0.45359237 kilograms

Notation:

lb = pounds
kg = kilograms

Examples:

150 lb = 68.04 kg
120.5 lb = 54.66 kg

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	lb	→kg	kg	Stop. For new case,
				go to 1

Kilograms to pounds

Notation:

lb = pounds
kg = kilograms

Examples:

60 kg = 132.28 lb
51.34 kg = 113.l9 lb

LINE	DATA	OPERATIONS	DISPLAY	REMARKS
1	kg	→lb	lb	Stop. For new case,
				go to 1