Anonymous wrote on 16-Aug-2019, with regard to Leonardo da Vinci - first conceived mechanical calculator .
AMAZING WEBSITE OMG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (read...)

Mike wrote on 15-Aug-2019, with regard to hp 50g - Change Display Mode.
Thank you. Thats what I needed (read...)

Jayne wrote on 07-Aug-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
Hi Kathy, I'm stuck on the same question, did you figure it out? if so, can you kindly assist me? Thanks so much (read...)

In replying to Kathy who on 23-Jun-2019 wrote: Need help solving this please: You enter into a 5 year net lease with tenant for 2,000 sq. ft. of space. The lease states that you will provide a TI allowance of $20 per sq. ft. Assume that the TI allowance is used to fund improvements in the tenants space at the beginning of the first year. In return for using the space, the tenant will pay an initial annual rent of $40 per sq. ft. at the end of the first year of the lease term, with subsequent increases to $41 per sq. ft. in year 2, $42 ...

José R. Bueno wrote on 14-Jul-2019, with regard to HP 41cx Emulator.
Dear Gentlemen. I am an engineer graduated in the last century and I do not like and I do not know how to use another calculator other than the HP 51X series. So I would like to express my sincere thanks for allowing me to download the emulator program from my inseparable HP51CX. Thank you very much. Best regards. José R. Bueno - São Paulo - Brazil (read...)

Celine wrote on 10-Jul-2019, with regard to HP 41cx Emulator.
My kid somehow made my HP-41CX display in British mode (I guess). It uses a comma where in the U.S. we'd use a decimal point. How do I change this back to US format? It's driving me nuts. I'm a homeschool Mom and I use this calculator a lot. (read...)

Tracy Tan wrote on 09-Jul-2019, with regard to Penang HP Calculator Resellers.
Price for HP calculator . Ex-stock? (read...)

Anonymous wrote on 01-Jul-2019, with regard to HP Calculator Heritage Ads 1972.
I want that calculator! (read...)

C.John wrote on 01-Jul-2019, with regard to Blaise Pascal - first digital calculating machine.
Amazing grace (read...)

Anonymous wrote on 01-Jul-2019, with regard to Blaise Pascal - first digital calculating machine.
Amazing (read...)

Kathy wrote on 23-Jun-2019, with regard to hp 10bII - Tutorial Varying Cash Flows.
Need help solving this please: You enter into a 5 year net lease with tenant for 2,000 sq. ft. of space. The lease states that you will provide a TI allowance of $20 per sq. ft. Assume that the TI allowance is used to fund improvements in the tenants space at the beginning of the first year. In return for using the space, the tenant will pay an initial annual rent of $40 per sq. ft. at the end of the first year of the lease term, with subsequent increases to $41 per sq. ft. in year 2, $42 ... (read...)

Anonymous wrote on 21-Jun-2019, with regard to hp 12c (platinum) - Handling Error Conditions.
try the example on [URL] www.educalc.net/145963.page and see if you can solve the problem (read...)

In replying to Ponchco2@gmail.com who on 21-Jun-2019 wrote: On IRR calculations, it always shows Error7. Just bought it!

Ponchco2@gmail.com wrote on 21-Jun-2019, with regard to hp 12c (platinum) - Handling Error Conditions.
On IRR calculations, it always shows Error7. Just bought it! (read...)

Anonymous wrote on 14-Jun-2019, with regard to Compare HP 6s - 30s - 20s.
I bought myself a spare HP 20S in case of my 30 year old 20S stops working. By far the best calculator I ever have come across in my lifetime of 47 years. (read...)

Anonymous wrote on 13-Jun-2019, with regard to HP10bii Troubleshooting.
Oh my god, I was getting so frustrated, this was exactly the issue. I was getting answers slightly smaller than they should've been consistently and I was troubleshooting for a whole hour. Thank you so much. (read...)

In replying to Anonymous who on 24-Mar-2019 wrote: Set your P/YR to 1 payment per year guys!! It solved my problem now im getting correct numbers!!

JOSE PAULA wrote on 10-Jun-2019, with regard to HP 12c Platinum.
Para estudar finanças (read...)

Anonymous wrote on 03-Jun-2019, with regard to Blaise Pascal - first digital calculating machine.
this is (read...)

Sebastian wrote on 02-Jun-2019, with regard to Free Downloads.
No encuentro conn4x para descargarla (read...)

Anonymous wrote on 15-May-2019, with regard to HP 11C.
Hi How to get rid of the 0.0000 00 set-up ? (read...)

Val wrote on 13-May-2019, with regard to hp 10bII - Resetting.
Please help all my calculations for future value and present value comes back incorrect. Please help urgent. I tried all the resetting nothing works. (read...)

David wrote on 11-May-2019, with regard to HP 12c Gold.
They are easily found on Ebay. (read...)

In replying to Steve who on 02-Jun-2017 wrote: Years ago, I used to buy replacement feet pads for the hp12c from educalc, I think, if memory serves me correctly. I do not find the available on this site. Does anyone know of a current source ? Thank you.

Anonymous wrote on 07-May-2019, with regard to HP 15c Keyboard Layout and Key Features.
the symbol "rad" appears when I press "g RAD" and the correct value of sin x or cos x display in the HP-15C but I don't Know why i can do the same with d degrees: nothing appears!! and the value of sin 90 is not giving me 1. What is this happening?? did I press a wrong key?? (read...)

Kath wrote on 07-May-2019, with regard to hp 12c (platinum) - Resetting the Calculator.
‘Pr Error ‘keeps showing on the display of my hp12C and I can't get rid of it. I have tried all the test . But it still doesn’t go off . What should I do ? (read...)

Kath wrote on 05-May-2019, with regard to hp 12c (platinum) - Performing Keyboard Self Test.
‘Pr Error ‘keeps showing on the display of my hp12C and can't get rid of it. I have tried all the test . But it still doesn’t work . What should I do ? (read...)

Leyiuyuan wrote on 03-May-2019, with regard to HP 30b Business Professional Specifications.
需要hp30b中文使用说明书,谢谢🙏;HP30B Chinese specification is required;thank you! (read...)

Leyiuyuan wrote on 03-May-2019, with regard to HP 30b Keyboard.
需要hp30b中文使用说明书,谢谢🙏;HP30B Chinese specification is required;thank you! (read...)

In replying to 华海街 who on 27-Jan-2019 wrote: 中文使用说明书

Judy wrote on 28-Apr-2019, with regard to HP Office Calc 100 (EOL).
how to I change the tax rate on HP OfficeCalc 100 please (read...)

In replying to Odette who on 18-Aug-2014 wrote: How do I set the tax rate on HP OfficeCalc 100

Anonymous wrote on 24-Apr-2019, with regard to HP Calculator Connectivity Kit for HP Prime.
It's too bad the HP-Prime is not just like any other USB device. For example Android phones. I'm a long time Linux user and find Windows impossible to use. It's really not worth my time to try to set up a virtual box machine with Windows. I really have no need for Windows at all, and detest working with it because there are so many problems. (read...)

Izzy4u wrote on 23-Apr-2019, with regard to Serial Cable for Old HP-48G Series.
I have a usb cable with five headers, which ones do I connect to my calculator? (read...)

Hmondel09@gmail.com wrote on 21-Apr-2019, with regard to hp 33s - Resetting.
My hp 33s don´t turn on, what should I do (read...)

Anonymous wrote on 14-Apr-2019, with regard to Changing the HP10BII Periods per Year Setting.
Very helpful thank you (read...)

In replying to Anonymous who on 17-Feb-2019 wrote: how to change the setting when finding for monthly compounding and for compounding daily

Sam wrote on 11-Apr-2019, with regard to Tutorial for Users.
whatever happened to the stress programme "Pipe Star 2" (read...)

Anonymous wrote on 08-Apr-2019, with regard to Blaise Pascal - first digital calculating machine.
I'm not surprised to see that you choose to remain anonymous. (read...)

In replying to Anonymous who on 28-Dec-2017 wrote: I'm not surprised to see that you choose to remain anonymous.

Bill wrote on 07-Apr-2019, with regard to Black-Scholes Equation Implementation on Microsoft VB.
In the above function what is the variable S , X , T , r , and v ? (read...)

Anonymous wrote on 04-Apr-2019, with regard to hp 10bII - Tutorial.
How do I calculate intrest rate implict using HB calculator? (read...)

Anonymous wrote on 26-Mar-2019, with regard to HP 41cx Emulator.
Hi, I also used this calculator in back then! May I ask you for a favor: If you type the following sequence on the HP41: 2000 Enter 0.02 x + What do you get? I thought that I remember that you get 2040 when you do this, however, using an emulator, this doesn't work. I am in discussion about this with James Thomson who wrote PCalc for iOs, which I use as my HP41 replacement (for simple calculations). Your answer would really help me. Cheers, Nikolaus (read...)

In replying to Marcel who on 15-Jan-2018 wrote: Super, vielen Dank, das war mein bester Rechner HP41, HB41c und HP41CX im Gymnasium und im Studium in den 80 Jahren. Brauche den heute immer noch nach bald 40 Jahren. Beste Grüsse aus St. Moritz und Zürich. Marcel Soppla

Anonymous wrote on 24-Mar-2019, with regard to HP10bii Troubleshooting.
Set your P/YR to 1 payment per year guys!! It solved my problem now im getting correct numbers!! (read...)

In replying to Amanda who on 01-Mar-2017 wrote: My calculator is giving me wrong answers when entering N=240, I/YR=0.33, PV=-350,000, FV=0 and PMT is 2113.56 instead of 2120.93. I have tried to play around with it and used N=20 x 12 , I/YR= 4 / 12 , PV=-350,000, FV=0 and PMT was correct @ 2120.93. The P/YR was already being set to 1 payment per year. Cheers.

Christopher wrote on 20-Mar-2019, with regard to Changing the HP10BII Display.
Great guide - much appreciated! (read...)

Anonymous wrote on 13-Mar-2019, with regard to Leonardo da Vinci - first conceived mechanical calculator .
omg i am doing a school project and this website is so helpful (read...)

Anonymous wrote on 10-Mar-2019, with regard to HP 10bII+.
Hi. To best use of any financial calculators, is to have a mathematical equation in mind and then use it to crunch the numbers for you. (read...)

In replying to Ronnie who on 09-Mar-2019 wrote: How to find the total tax liability for $155,000 of taxable income in 20XX, schedule X? Please show work (formula's) using HP 10bll+ Financial Calculator.

Ronnie wrote on 09-Mar-2019, with regard to HP 10bII+.
How to find the total tax liability for $155,000 of taxable income in 20XX, schedule X? Please show work (formula's) using HP 10bll+ Financial Calculator. (read...)

Anonymous wrote on 03-Mar-2019, with regard to HP 39gs.
This site is very useful for me. I'm in trouble with definite integral calculation on HP39gs (ROM v2.22). The following expression does not become zero. ∫(0,360,cos(X),X) = -5.8572E-11 (Angle Measure: Degrees) Is this something like bug? Does anyone know? (read...)

Nola wrote on 01-Mar-2019, with regard to HP 35s Emulator.
Thank you so much Kind regards, Nola bernstein (read...)

In replying to Aeberon2 who on 28-Feb-2019 wrote: Hi NOLA, did anyone reply to your enquiry as I just might be able to help. I still have an HP55 and a 41C plus an excellent 41CX lookalike on an iPad that works perfectly. I’ll look through some of the stuff I obtained back in the late 70s as I have a programming manual and I’m sure there was a section on standard deviation Regards

Aeberon2 wrote on 28-Feb-2019, with regard to HP 35s Emulator.
Hi NOLA, did anyone reply to your enquiry as I just might be able to help. I still have an HP55 and a 41C plus an excellent 41CX lookalike on an iPad that works perfectly. I’ll look through some of the stuff I obtained back in the late 70s as I have a programming manual and I’m sure there was a section on standard deviation Regards (read...)

In replying to Nola Bernstein who on 12-Nov-2016 wrote: Can anyone help me with RPN program instructions for grouped standard deviation HP35S. Manual has ALG instructions only

Jkjk wrote on 25-Feb-2019, with regard to hp 10bII - Tutorial Switch Periods and Commas ....
thank you (read...)

Jim wrote on 20-Feb-2019, with regard to HP 41CX.
How do you clear the RAD 2 on the screen from a 41CX (read...)

Anonymous wrote on 17-Feb-2019, with regard to Changing the HP10BII Periods per Year Setting.
how to change the setting when finding for monthly compounding and for compounding daily (read...)

Mr Zhou wrote on 13-Feb-2019, with regard to hp 10bII - Tutorial Switch Periods and Commas ....
My calculator can’t switch on. It’s new what must we do. (read...)

Kerry wrote on 13-Feb-2019, with regard to HP 42 S RPN Scientific Calculator.
[URL] www.swissmicros.com/dm42.php (read...)

In replying to CRAWLIN'BY who on 07-Jul-2013 wrote: I need to buy a hewlett packard 42s....Where?

Anonymous wrote on 13-Feb-2019, with regard to hp 35s - Entering a Program.
Dumb question What keystrokes are needed to enter STO (J) in hp35s (surveying program) (read...)

In replying to Jason who on 29-Oct-2015 wrote: I am trying to complete the adjustment program for my hp35s. I can not figure out how to code the indirect registers (i) and (j). Can someone advise how to encode this please...

Peter Tong wrote on 10-Feb-2019, with regard to hp 10bII - Tutorial Ordinary Annuities.
Press [1] [Gold Shift] [P/YR]. Then start all over from the top. (read...)

In replying to Lirio who on 09-Feb-2019 wrote: I got wrong answer .. i got 507.55 . What will i do?

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