Calculators by Ken

Calculators by Ken

prentice@sympatico.ca

Hello! Thank you for coming to my web site. These are unique. Nothing else like them.... All 82 calculators are operated by the mouse only.. NO keyboard input, NO return key to press, etc.. Just point and click. With the mouse-operated keypad, just click any value then click on one of the buttons on the calculator. Presto-- answers! No more reference books. No more calculations or guesswork! For example enter any number at all, and you can calculate anything to do with a right angle triangle. Want to know the area quickly? Just put in any angle and length or any two lengths. This is just one of 82 great calculators that you can have. They come with an easy to use Menu too! Send for a free sample and see...No strings attached.. These calculators are compiled in Visual Basic (by me) and can be used on any version of Windows 3.1, 3.11, 95, 98, NT, 2000, ME and XP. They require your system to have the VBRUN300.DLL file in your Windows/System directory which should be in there anyway.. Copyright 1998.

Free samples on request. Just email prentice@sympatico.ca

Credit Card Purchase (secure site)

OR

The Index of Calculators available

Click to see information on that particular calculator!

Large Calculator

Capacitance Reactance

Circular Angles

Conveyor Speeds

Current Density

Drill Equivalents

Duct Area Conversions

Elect Field Strength

Electromotive Force

Inductive Reactance

Mile per Gallon

Parallel Resistance

Pressure/Stress

Resistor Color Code

Resistance in Series

Segment of a Circle

Tap Drills (Imperial)

Tap Drills (Metric)

Wind Chill Index

ACCELERATION

Convert 8 units of acceleration at once!

Free-fall

Meter per second sq.

Mile per hour per second

Foot per second squared

Centimeter per second sq.

Jerk

Gal | Milli-gal

Millimeter per second sq.

Printable 16k

Linear Feet per minute/size of duct to cubic feet of air

cubic feet of air/size of duct to linear feet

linear feet/cubic feet of air to size of duct

all units Imperial

Metric on request

Ansi Codes

A very quick reference to the Ansi codes on your machine.

This will show all the codes from 0 to 255

And since each computer is different

the symbols will be slightly different also.

7k

AREA

lets you choose from 26 units of area and converts all units once you enter the value.

Township | Square miles | Square kilometers

Legal Subdivision | Hectares | Acres | Square Arpent

Roods | Square Chain | Are | Square Perche | Square Meters

Square Yards | Square Feet | Square Inches | Square Centimeters

Square Millimeters | Square Mil | MCM | Circular Mil

Square Micrometer | Square Nanometer | Square Picometer

Barn | Square Femto-meters

All display at once. 56k

ATOMIC MASS

Lets you convert 12 units of atomic mass and converts all units once you enter the value.

Kilogram | Gram | Alto-gram

Atom of Carbon 12 | Deuteron rest Mass | Neutron rest Mass | Proton rest Mass

Dalton| Atomic Mass Unit | Muon rest Mass | Electron rest Mass | Electron-volt

All display at once. 18k

BTU

converts nine different BTU standards.

BTU (39F) BTU (mean)

BTU (International)

BTU (59F/15C)

BTU (60F) BTU (60.5 Can)

BTU (60.5 ISO)

BTU (therochem)

Kilo-joule

This tiny calculator resides on you computer and at your call with a click of a mouse.

Printable 16k

LARGE CALCULATOR

Can't see the Microsoft Calculator?

This is Unique!!!

This is for the near sighted!

Super large keys, and DISPLAY thats easy to see..

All math functions of a typical Calculator

With Memory and Square Root

Only 10k

247 YEAR CALENDAR

From 1853 to 2100 calendar

Select any Year and any Month

The individual month is displayed

This tiny calculator resides on you computer and at your call with a click of a mouse.

Printable 86k

CALORIES

Saves you time by giving all units

calculated instantly

Calorie (dietetic), Kilo-joule, Calorie (mean)

Calorie (international), Calorie (15 C)

Calorie (thermo-chemical), Calorie (20 C)

Joule

14K printable

CAPACITIVE REACTANCE

Saves you time by giving all units

calculated instantly

Farad, Microfarad, and Picofarad

Hertz, Kilohertz, and Megahertz

Any data, any unit

"Click" done

18K printable

CIRCLES

Will calculate

Area

Diameter

Circumference

Radius

All at once!

Any value, in any parameter

This tiny calculator resides on you computer and at your call with a click of a mouse.10k Printable

ANGLES OF A CIRCLE

Converts any decimal input you select to all of these!

Revolutions

Right Angles

Radians | Degrees

Graduations

Milli-radians

Minutes | Seconds

Printable 15k

CIRCULAR MILS

For Copper Wire Only

Put information in any of these formats

Circular Mils | Square Inches

Square mm | Diameter in Inches

Diameter in MM | Square Mils

And get the following conversions

Lbs/ft | Kg/m | Lb/mile | Feet/Lb | Meter/kg | Lbs/ohm | Ohms/lb

Ohms/Kg | Feet/Ohm | meters/Ohm | Ohms/Foot | Ohms/Meter

Printable 20K

CONES

Putting in two known values

will calculate the other three.

Diameter of Base

Length of Slope

Height of Cone

Area of Slope

Volume of Cone

Printable 15K

CONVEYOR SPEED

Done for a small company that installs conveyors.

Just slide the bar for quick conversions of speed

Feet/minute

Inches/minute

Feet/second

Inches/second

Seconds/Inch

Metric on request

Printable 7k

CURRENT DENSITY

Select any of the following to convert to all the others.

Ma/Cir Mil

Ma/sq Mil

Kilo-amp/sq in

Mega-amp/sq Meter

Amp/sq cm

Amp/sq in | Kilo-amp/sq Meter | Amp/sq Meter

This tiny calculator resides on you computer and at your call with a click of a mouse.Printable. 14k

DRILL EQUIVALENT

Pick a number drill

or a letter drill

or a fractional drill

and you get the metric

and decimal equivalents.

This tiny calculator resides on you computer

and at your call with a click of a mouse

Printable. 55k

DRIVE SPEEDS

Solve any pulley problem.

With any combination

of speed or pulley sizes,

this handy little calculator will calculate

the unknown speed or size your looking for.

This tiny calculator

resides on you computer

and at your call with a click of a mouse.

12K and printable.

Duct Area Conversions

This handy little calculator will let you

quickly find the equivelent area of a duct

that is round, square and oval

all at once!

No more mutipule calculations and reference books!

Printable. 11k

ELECTRIC FIELD STRENGTH

You can convert between any and all of the following units.

Megavolt/meter

Volt/mil

Kilovolt/inch

Kilovolt/meter

Volt/millimeter | Volt/centimeter

Volt/meter

Newton/coulomb

14K Printable.

ELECTROMOTIVE FORCE

Converts from

Megavolt | Kilovolt

Statvolt

Volt

Millivolt

Microvolt

Abvolt

7 conversions at once.

Printable. 13k

ELLIPSE

Lets you enter the two radii

and gives you

the PERIMETER

and AREA.

You can also

put in an AREA and either RADIUS

to get the PERIMETER and missing RADIUS.

26K printable

ENERGY

36 units of Energy converted instantly

Quad, Megaton TNT, Terawatt-hour, Kiloton TNT, Gigawatt-hour, Tera-joule

Ton TNT Megawatt-hour, Giga-joule, Therm, Thermie, Kilowatt-hour, Horsepower/hr

Mega-joule, Kilo-calorie, Frigorie, Watt-hour, CHU, BTU, Kilo-joule, Kg Force/m

Calorie, Ft/lb, Joule, Watt-second, Newton Meter, Foot Poundal, Millijoule

Microjoule, Erg, Dyne cm, Nano-joule, Giga ev, Mega ev, Atto-joule, Electron volt

79K printable

FLOW RATES

Convert 20 units of flow rate in one click

Cubic Miles per Year | Cubic Kilometers per Year | Cubic Meters per Second

Cubic Yard per Sec. | Cubic Ft per Sec. | Gallons (Can) per Sec. | Gallons (US) per Sec.

Cubic Decimeters per Sec. | Liters per Sec. | Cubic Ft per Minute | Cubic Meters per hr

Gallons (Can) per min | Gallons (US) per min

Fluid Ounces (US) per sec | Fluid Ounces (Can) per sec

Liter per minute | Cubic Centimeters per second

Milliliter per second | Gallons (Can) per day | Gallons (US) per day

All calculated with one click of the mouse. 32k printable

FRACTIONS

This handy calculators take the pain

out of solving fractions

Just put in any numbers and it will reduce

them to the lowest fraction

10K printable

FREQUENCIES

Put in the frequency

in hertz, kilohertz, megahertz, gigahertz

OR

the wavelength in inches, feet,yards, millimeters, centimeters, or meters

OR

put in the time period in seconds, milliseconds, microseconds or pico-seconds.

Then just look for the calculations you want in any of the other units

(NOTE: All calculations us Pi to the 10th decimal for greater accuracy)

21K printable

FRUSTUMS

Both Conical and Pyramidal Frustums

Just put in the lenght of the sides and depth

OR

the diameter of large end and small end

for instant answers

Only 17 k

GAUGES

Lets you easily select any gauge from 0000 to 28

then gives you the metric and decimal diameter of the wire.

Non Ferrous AWG

US Standard | London

Stubbs | NBS

Birmingham | Steel Wire Gauge

BWS | SWG

British Imperial and Old English

35K printable

GEAR SPEEDS

Will give you automatically

the unknown speed

or number of gears

you need on the second drive

Just put in the number of teeth, speed

and then the number of teeth on the other drive

PRESTO-calculations complete

12K Printable.

Head of Water

A simple little calculator

that gives the conversion between

the "Feet of Head"

to

Lbs per square inch

or visa versa

9K Printable.

Heat Index

Another simple little calculator

that converts the Heat Index

Just enter the temperature in F or C

then Relative Humidity

to find the Apparent Temperature

in Celsius or Fahrenheit

14K Printable.

HEX/OCT/DECIMAL

Is a little handy

quick calculator to convert

HEXADECIMAL

OCTAL

DECIMAL

Just slide the thumb bar

to get any value

then look for the conversions of the others

7k

HORSEPOWER

Will convert any of the 6 known horsepowers

Boiler | Metric | Ft/lbs | Electric | Water | UK

along with KILOWATTS and WATTS

to numbers you can see

Input any number

and click on any type of horsepower/watts

to get exact conversion

Printable 15k

ILLUMINACE

Will convert

all 8 units of measurements

Phot

Lumen per sq cm

Kilolux

lumen per sq foot

foot candle | Lux

lumen per sq meter | Candela Steradiam per sq meter

Printable. 13k

INDUCTIVE REACTANCE

Saves you time by giving all units

calculated instantly

Henry, Millihenry, Microhenry, and Picohenry

Hertz, Kilohertz, and Megahertz

Any data, any unit

"Click" done

25K printable

INERTIA

17 conversions

calculated instantly

Kg force m sec sq, Kilo-pond m sec sq, Lb force ft sec sq, Slug ft sq,

Kg m sq, Lb force inch sec sq, Kg force cm sec sq, Kilo-pond cm sec sq, Lb ft sq

Ounces force inch sec sq, Gram meter sq, Lb inch sq, Kg cm sq, Gram force cm sec sq

Pond cm sec sq, Ounce inch sq, Gram cm sq

25K printable

LENGTH

Choose from 48 units of length

Parsec| Light-year | Astronomical Units | Nautical League | League | Nautical Mile | Mile

Kilometer | Furlong | Engineers Chain

Cable | Hectometer | Arpent |Chain | Decimeter | Perche | Rod | Pole |

Fathom | Pace | Meter | Yards | Varas | Long Cubit | Short Cubit

French Foot | Foot | Engineers Link | Span | Link | Hand | Inch | Centimeter | Pica

Millimeter | Point | Caliber | Mil | Micrometer

Micron | Micro-inch | Nanometer | Angstrom | Bohr | Pico-meter | Femto-meter | Fermi

Printable 117k

Logic Gates

This Logic gate program shows how

"AND" "NAND"

"OR" "NOR" "Exclusive OR"

and "J-K FLIP-FLOPS work

You can toggle the inputs and watch the results

on the output!

The Flip-Flop has an automatic clock function

that allows you to watch exactly what is happening as you toggle each condition

175k

LUMINANCE

Convert 12 units at once

Stilb

Candela per sq cm/sq inch/sq foot

Lambert | Foot Lambert

Milli-Lambert | Lumens

Nits | Apostilbs

One click

all conversions

20k printable

Magnetism

Five separate divisions of 40 Units

Magnet-motive Force

Kilo-ampere, Ampere-turn, Ampere, Gilbert, Oersted cm

Magnetic Flux Density

Weber/sqm, Tesla, Kilogauss, Millitesla, Gauss, Lines/sq in, Microtesla, Nanotesla, Gamma

Magnetic Field Strength

Kilo-ampere/meter, Oersted, Ampere-turn/in, Ampere/meter, Ampere-turn/meter,Newton/meter

Magnetic Flux

Weber, Milli-weber, Micro-weber, Unit Pole (emu), Maxwell, Lines of Force

Magnetic Moment

Joule/tesla, erg/gauss, Electronvolt/tesla, cm-1 T-1, kelvin/tesla

Moment of Electron, Bohr Magneton, m-1 T-1, Moment of muon, Moment of proton

Moment of neutron, Nuclear magneton, Moment of deuteron, Hertz/tesla

50K printable

Mass Density

24 Units of Mass per Volume

Lbs/cu in, Ounces/cu in, Long Ton/cu Yard, Mega-gram/cu Meter, Grams/cu cm, Tonne/cu Meter

Kilogram/liter, Kg/cu decimeter, Slug/cu Ft, Lbs/gallon(US), Lbs/gallons(Imp), Lbs/cu Ft

Ounce/gallon (US), Ounce/gallon (Imp), Ounce/cu Ft, Kg/cu meter, Gram/liter, Lbs/cu Yard

Grain/cu Ft, Ounce/1000 cu Ft, Gram/cu meter, Milligram/Liter, Milligram/cu Meter

40k Printable

Mass/Weight

Lets you see all 27 units of Mass converted at once

Long Ton, Mega-gram, Tonne, Ton, Hundred-weight Long, Hundredweight, Cental, Slug

Quarter,Stone, Kilogram, Pound, Pound Troy, Assay Ton Long, Ounce Troy, Assay Ton

Ounce, Dram Troy, Dram, Penny-weight, Scruple, Gram, Carat, Grain, Point Milligram, Micro-gram

48k

MOON PHASES

Lets you

click each day of the moons' phases

Labels tell you when

WAXING, WANING, QUARTER, FULL etc

As you click the phase button

each day is stepped through

You have to view the calculator to see this new concept

582K

Miles per Gallon

Will tell you how many

how many miles per gallon

AND liters per 100 kilometers

and cost per liter to cost per gallon (US and Imp)

and visa versa

16k Printable

MPH-KM/H

Will tell you how many

feet per second

Kilometers per hour

meters per second

when you slide the bar

to any miles per hour value up to 200

7k Printable

Nozzels

Will tell you how many

cubic feet and feet per second

the water will flow out

a nozzel. You put in size of nozzel

and the pressure to get the results.

12k Printable

OHMS LAW

For DC calculations

RESISTANCE

VOLTAGE

CURRENT

WATTAGE

in a split second!

Just enter any two known values

PRESTO your calculations are done!

14k Printable

PARALLEL RESISTANCE

Calculate

from 2 to 10 resistors

in parallel

and display the answer

lot faster than using the conventional calculations

on a regular or programmable calculator

Printable 15k

PERCENT

Will let you put in any percent

even decimals

or the answer first

Solve any percent problem with just a couple of clicks

No more calculators to search for!

This is so simple to use

Makes life easy!

Printable 10k

PI

Not a calculator

but an extremely quick way to display

the value of Pi

up to the 75th decimal spot

As you slide the thumb bar

each decimal position is displayed

Printable 8k

PIPE TAP DRILLS

Get all seven standards

for 10 sizes of pipes

NPT

NPTF

NPS BSTP

BSPP

ISO TAPER

ISO PARALLEL

Printable. 18k

PLANETS

Latest information on the Planets of our solar system

Mass,Density, Mean Radius, Gravity

Rotational Period, Minimum distance from the Sun

Maximum distance from the Sun

Orbital Velocity, Time around Sun

Moons, Rings

41k

Polygons

100 of the most common polygons

Each technical name is provided

Example... 86 sided polygon "Octacontakaihexigon"

Inside angles

Center angle

Area

Perimeter

Apotherm

and Radius of each

22k

POWER

23 units of power

Megawatt, Boiler Horsepower, Kilo-calorie/sec, Ton of Refrigeration, Btu/sec

Kilowatt, Horsepower, Metric Horsepower, Btu/min, Meter Kg/force/sec, Calorie/sec

Calorie/sec, Ft lb force/sec, Kilo-calorie/hr, Watt, Joule/sec,

Newton Meter/sec, Btu/hr, Ft lb force/min, Milliwatt, Ft lb force/ hr,

Micro-watt, Erg/sec, Dyne cm/sec

38k

POWER DENSITY

14 units of power density

BTU/square inch per second | Megawatt per square Meter

Watts per square Millimeter | Calorie per square Centimeter per second

Langley per second | BTU per square Foot per second

Watts per square Centimeter | Watts per square inch

Kilowatt per square Meter | Watt per square foot

BTU per square foot hour | Watt per square Meter

Calorie per day per square Centimeter | Milliwatt per square Meter

21K Printable

PRESSURE / STRESS

Convert all 30 units instantly

Ton-Force per sq inch, Hectobar, Kilogram-force per sq mm., kip per sq inch

mega-pascal, atmosphere, bar, kilogram-force per sq cm., technical atmosphere

kilo-pond per sq cm., pound force per sq inch, inches of mercury, foot of water

cm of mercury, kilo-pascal, inches of water, torr, mm of mercury, milli-bar

gram-force per square cm., cm of water, pound per square foot, pascal, newton per sq meter

micro-bar, barye, dyne per sq cm

56k printable

Radiology

Three divisions of 22 Radiology Units

Activity (radionuclides)

Curie, Tarabecquerel, Gigabecauerel, Milli-curie, Megabecquerel

Picocurrie, Becquerel, Disintegrations/sec

Exposure

Coulomb/kg, Milli-coulomb/kg, Roentgen, Micro-coulomb/kg

nano-coulomb/kg, Pico-coulomb/kg, Elementary Charge/kg

Absorbed Dose

Joules/kg, Gray/Sievert, Rad/Rem, Rep, Milli-gray/Millisiever

Millijoule/kg, Erg/gram

29k

Random Numbers

Select how many numbers you would like

Select the lowest number used

Then select the highest number used

Then generate the random numbers.

Quick. Easy. Simple

Great for any lottery selection of numbers

29k

RESONANCE

Take the pain out of calculating

any series resonant circuit

consisting of inductance and capacitance

Just click on the mouse operated keypad

and enter the data into any of the units

Frequency in hertz, kilohertz, megahertz

Capacitance in Farad, Microfarad or Picofarad

Inductance in Henry, Millihenry, Microhenry, or Picohenry.

All calculation are displayed. 43K printable

Resistance in Series

Have a series resistance problem?

This will make it too easy to calculate

Just put in the minuim number of known values

and every value is calculated

Resistance, voltage, current and wattage

156k

Resistor Color Code

Saves you time by giving you the colors

to select the color code of resistors

Complete with common 5% values to select from

and specifications for wire wound resistors

43k

RMS

Saves you time by giving all units

calculated instantly

Peak to peak

Average

Peak

RMS

10K printable

Roll Length

A very quick way to find the length of material

on a core. Metric and Imperial both at once.

19k

Roots

A very quick way to find just about any root

of any number. Square root, cube root, 125th root

17th root, etc. Just put in any number and any root

and the answer is shown right away. No calculations for you!

10k

Segment of a Circle

This one will easily calculate any arch

for buildings or geographical problems.

put in the known values of two to find

Radius

Cord Length

Angle

Height of Cord to Arc

Arc Length

And Area of the Cord to Arc

18K printable

SPEED

Gives you quick calculations

for speed verses time

in both metric and imperial.

You can input the time in seconds

then distance in feet/meters

for results in mph or kph

Or input distance then time or

speed and distance for the answers.

11K printable

SPHERE

Gives you

Diameter

Radius

Volume

Circumference

Volume

of any size sphere

Enter data into any of the five units to get the rest

11K printable

UNITS OF SOUND

Will convert

Bel

Nepers

Decibels

Decinepers

with just a mouse click

Any value on any unit

all conversions are displayed and can be printed

10k

STEEL WEIGHTS

Will tell you exactly

how much any piece of metal weights.

Chose one of 32 types of metal

You put in the dimensions

Length, width and thickness

and end up with the weight in pounds and kilograms

Surface area and volume are also show

35k printable.

Surface Speeds

Easily find the surface speed you need

in Metric or Imperial

Just enter in Meter/sec or Feet/min (automatically converted)

then either RPM or Diameter (MM or Inches automatically converted)

and the values are all displayed

33k

TAP DRILL IMPERIAL

Replace the pocket chart many tooling/machine personal carry.

With one click, you get

clear/large print

of the drills sizes you need to tap a specific hole.

Each size will give the

pitch, decimal, numbered, and metric drill size

to drill the tap hole.

The calculator is printed out with one click.

18k

TAP DRILL METRIC

Replace the pocket chart many tooling/machine personal carry.

With one click, you get

clear/large print

of the drills sizes you need to tap a specific hole.

Each size will give the

pitch, decimal, numbered, and metric drill size

to drill the tap hole.

The calculator is printed out with one click.

25k

TEMPERATURES

Converts

Reaumur

Celsius

Kelvin

Fahrenheit

Rankine

Absolute Celsius | Absolute Fahrenheit

and even the "Meadow Cricket" chirp temperature conversions!

all at once!

Printable.. 15k

THERMAL UNITS

Conversions for all 14 units

MW/(sq m * K/m), KW/(sq m * K/m), KW/(sq m * C/m), W/(sq cm * K/m),

W/(sq m * K/m), W/(sq m * K/cm), W/(sq in * F/in)

Calorie/(s * sq cm * C/cm), Kilo-Calories/(h * sq m * C/m)

Joules/(s * sq m * C/m), Kilo-Joules/(h * sq m * K/m)

BTU/(s * sq ft * F/ft), BTU/(h * sq ft * F/ft), BTU/(h * sq ft * F/in)

13k

TIME CONSTANTS

Both RC and LC time constants

With an adjustable resistance for quicker solutions,

Once you put in the RC value you can adjust the time with a 5000 ohm adjustment

The same can be done with LR

Very quick and simple

18k

TORQUE

Conversions for all 13 units

Maganewton Meter

Kilo-newton meter | kilo-pond meter

kilogram-force meter | pound-force foot

newton meter | pound-force inch

ounce-force foot | ounce-force

inch | millinetwon meter | gram-force centimeter

micro-newton meter | Dyne Centimeter.

Printable. 19k

RIGHT ANGLE TRIANGLES

Will calculate

with only two known inputs

of a Right Angle Triangle

and give you all

angles,lengths, area and perimeter

Printable 19k

VELOCITY

convert 15 unit at once

speed of light | mega-meter/sec | mile/sec

kilometer/sec | mile/min. | meter/sec.

knot | nautical miles/hr. | mile/hr. | feet/sec.

kilometer/hr. | inch/sec.

meter/min. | centimeter/sec

foot/min. | mm/sec

all units at once in one easy click.

Printable. 24k

VOLUMES

Converts all 46 units of volume instantly

Acre Foot | Register Tons | Petrograd Standard | Cord

Cubic Meter | Stere | Cubic Yard | Hogshead | Barrel(uk) + (us) | Hectoliltre

Bushel (Can) (US) | Cubic Foot | Peck (Can) (US) | Gallons (US) (Can) (Dry) | Board Feet

Quart (Can) (US) | Cubic Decimeter | Liter | Fifth | Pint (Can) (US) | Cup (Can) (US)

Gill (Can) (US) | Fluid Ounces (CAn) (US) | Cubic Inch | Tablespoon (Can) (US)

Teaspoon (Can) (US) | Dram | Fluid Dram | Cubic Centimeters | Milliliter

Minim (Can) (US) | Cubic Millimeter | Lambda

Printable 120k

WATER

Converts 10 units at once

Cubic Inches

Cubic Feet

Cubic Yard

Cubic Centimeter

Cubic Meters | Liters

Gallons (Imp) | Gallons (US)

Pounds | Kilograms

Printable 16k

WIND CHILL INDEX

Fahrenheit and Celsius in separate sections

Just enter the Temperature and Wind Speed

Both conversions done at once.

Old and new formula results now included!

14k

WIRES

36 types of wire

from "Alumel" to "Tungsten"

and gauges from 2000 MCM to #60

Just a few clicks and you can get

the resistance of any length

in feet or meters, instantly

Printable 35k

PRICES

These calculators are compiled in Visual Basic. If you have a request for a special calculator, send me an email. I usually do new ones for free (to get experience) if I think it will be reasonably easy to do. If you have charts, these calculators are excellent to replace them.

The calculators can be purchased two ways..

1. Send US$10.00 for an email delivery of ALL calculators. (~700k zipped)

2. Send US$29.95 for a CD (programs and source codes) sent by snail mail of ALL calculators.

Credit Card Purchase (secure site)

Ken Prentice

10 McGill Drive

Janetville, Ontario

Canada

L0B 1K0

705-328-1950

Site Meter

Email me at prentice@sympatico.ca

calculators by Ken