Bitcoin Forum

I started a new project, a bitcoin price calculator that can calculate live and historic Bitcoin prices with euros, dollars and Japanese yen.

WEBSITE:
https://bitcoinpricecalc.com/

Interesting website and the domain name is quite good imo.

I made something similar (https://bitcoindata.science/bitcoin-units-converter.html) some months back, but it doesn't have historical data.

I will make a suggestion. I think you could add a chart below your calculator, for the selected currency, as it will show the historical data as well, making it easier to navigate between dates.

Nice! Although longer name than preev, it makes more sense.
I'll throw in also a suggestion: please consider digit grouping for bigger numbers.

Also, right now it's just a competitor for preev with the (undeniably) nice touch of historical data. Not bad, but you have the tools for more.
Maybe for medium-long term you'd also add more fiat currencies (maybe from xe or similar) and more (all?) crypto coins that can be traded, at least for spot price. Then the website will become important.

The site is nice and smooth, but it is very basic. I will give you some suggestions:

 - Add more platforms to compare prices.
 - Add the possibility of printing the price, time and amount.
 - Add historical data.
 - Add a specific title and track the title's movement in the charts.
 - Add more trading pairs.

More can be added, but you need the night mode now and quickly.

Nice site, I like the historical feature and that you have a simple API. Keep it up!

Good job! I may myself use this. Here's some feedback:

• Add night mode.
• Add prices prior to 2013. (2009-2012)
• Add historical data for each month.
• Add lightning donations!

Found a small bug in the historic prices:

• It looks like the amount of data that we could access, differs based on what currency we're viewing the data...
  
  • $ = Starting from February 2, 2012 onwards
  • € = Starting from September 12, 2013 onwards
  • ¥ = Starting from June 25, 2015 onwards

I would suggest making a button to jump back to the current date.
After looking at a historic date I was looking for a simple button to jump back to todays price but I had to reload the page :)

Thank you for the suggestion, I added a chart below the calculator.

Thank you for the suggestion.

Can you give an example of digit grouping for bigger numbers?

Thank you for the list of suggestions.

I currently do not yet want to add more trading pairs, however to understand your suggestion, what kind of pairs would you like to have added?

Can you give me an example of how you would like the price, time and amount be printed, would you like a csv export button?

I added a "dark/night mode" toggle button.

Thank you.

I added "Night/Dark mode" and a chart with historical data.

The website contains a Bitcoin donation address that is visible on the API and Privacy statement page in the footer.
I have taken a look at "lightning donations" and learned something about "Bitcoin lightning transactions" :)

For now I do not want to implement lightning donations however it is something that I am gonna checkout, interesting technique.

Historical prices prior to 2013 is something that I need to checkout, I would need to find the data somewhere :)

You are correct, the historical price sources that I used do not not all start on the same date.

I added a "Today" button that jumps to the current date.

Your site shows in the box, now, for example, for 100 BTC -> 4231184.00
With digit grouping it would be either 4 231 184.00, either 4,231,184.00, for easier reading.

It's interesting that in page title you did put some sort of grouping (although dot is usually the decimal point, but I know that it depends on the country/locale) 42.311,84

Perhaps you should consider using a single source for all of them and just convert everything instead.
^{- While you're at it, you might want to consider using a different source with more historical data [e.g. "this one (https://www.blockchain.com/charts/market-price)" shows prices from Aug 23, 2010].}

Thank you for the elaboration, I added the grouping of numbers in the input field.

I don't know what sources you are using to fetch Bitcoin prices but you should mention them somewhere (I couldn't find any info about that), and using multiple sources mid value would be the best option.

There is a lot of blank white space on your website so I would definitely make those numbers for BTC and fiat currencies bigger, and date font size should be smaller.

I like date and calendar feature but oldest date I can find for historic Bitcoin prices is September 2013, so adding prices before that would be great.

Thank you for all the suggestions.

I made the numbers bigger and font size of the date is now smaller.

I will take a look at other historic data with source reference, might be cool to see the first BTC/USD price.

I checked the price data, the site mentioned that the first price was 2013, this is incorrect, the first price is indeed February 2, 2012.

It should be much bigger than this and there is still a lot of empty space on home page, but that is just my opinion, so you can ask other people for feedback.
Maybe something like this I posted below or play around more with colors and size.

https://i.imgur.com/lsYSn5W.jpg  vs  https://i.imgur.com/Ylo4r2u.jpg
                               original                                                                                        my quick suggestion

I agree about the whitespace.

I removed a lot of the whitespace by pulling the introduction more to the top.

I updated the layout of the website and fixed a small mobile issues with the chart.

Does anyone have new suggestions?  ;D

If you ask for it, you get it  ;)
Nothing big, still...

I've looked at your API. I think that the date and timestamp used in requests/responses would be better to be UTC, so one doesn't have to guess your timezone and DST dates.
Also, if people will start using your API, you may have to restrict the number of calls/minute so you don't get flooded.

I changed the timestamp format to UTC.

Suiggest :

• Provide the Link / Export

Info : for example i want proof or show someone about the date , i provide a link from your site :
for example a button like Generate Link or ...

Sample Link : https://bitcoinpricecalc.com/xun3s
or Another : https://bitcoinpricecalc.com/20210703

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there was another one .... i already forget about it :P

I did a security scan of your website and you did great!

You had zero outdated libraries, great CDN usage, and all around, you did a great job on maintaining security for you, and your users!

I added a share link that includes the selected currency and date.

I adjusted the currency format notation for euro's and dollars in the calculator.

Example:

euro's: 36.977,36
dollars: 38,581.14

I've always pointed people to Preev, as I think many would have. However, I quite like the implementation of the basic historical data. Something which I believe would be beneficial to new users who might want to see how far we've come.

If I had one suggestion, and I touched upon it below in my response to hugeblack. Keep it simple. Don't look to compete on all fronts, and make the site messy. Preev was successful, and is the go to choice because of its simplicity, and clean design. I the site is perfect how it is, and if you were to look at adding other data, I would suggest doing it on its own pages, and keeping that landing page as clean as possible.

I guess the only other suggestion would be to look at adding more currencies to compare to. Although, you've satisfied some of the larger populations already. For me, that's the only place that Preev currently beats you in, and maybe they have a bit better interface in terms of simplicity.

I know this has already been addressed now as the suggestion was made a long time ago, but I quite like basic sites though. I hate when sites try to compete on all fronts, and ultimately end up messy. Personally, I would have set up the website a little differently, so I would have had the charts higher up on the page, and the rest of the information below it. Other than that, adding your suggestions might just lead to a messy site. I think, your suggestions are good, but I think if they were to be added they should be added to their own page, and keep the landing page relatively simple.

Nice work! Website loads very quickly!

Everyone mentioned Preev but somehow no one has suggested for you to add these units:
mBTC = 0.001 BTC
uBTC = 0.000001 BTC
satoshi = 0.00000001 BTC

Almost 9 months have passed since you launched this website, so, I assume you are passionate around this project and I truly advice you to focus your attention on the design. You need to change the colors, put some sections in better areas.
Make your website more mobile-friendly, I can load Bitcoin to USD Chart on PC but it feels seriously uncomfortable when I run on my iPhone while coinmarketcap.com's chart works like a charm.

Cheers   ;)

I thought about the advise and came up with a redesign of the website and I added more currencies.

What do you think of the new design and functionality?

I added the Bitcoin price in Swiss franc.

I have a question, or maybe I noticed one bug on your website.
When I open it, page loads and it shows current market value of Bitcoin in USD with chart, but when I switch to any other currency (eur, chf, pound, etc) or when I click back to USD, there is no more chart.
If I want to get back chart I need to click below on buttons for 1D, 1W, 1M, etc.
Maybe this is made by design, but I would like to see automatic loading of charts with all currencies.

I tried to re-produce the bug and found an issue with Firefox when the referrer headers are disabled in-combination with Chart.js.

Are you using Firefox, if so can you check if you disabled referrer headers?

Last time I tried it in several different browsers like Librewolf (fork of Firefox with custom settings), Firefox and Chromium with default settings plus uBlockOrigin, and I was getting the exact same issues.
However, I just checked your website again and it's working perfectly normal, loading all charts, so it must have been some temporary glitch.

This will come in handy especially now since preev.com has been down for some time already. I tried to see if I can reproduce the display glitch dkbit98 mentioned even if he says it was fixed, but it seems to be working just fine both on Firefox and Chrome. Switching between the charts does require a bit of loading time, especially if you click on the "1Year" or "All" buttons, but it's not too much of an issue.

Where do you get your historical data from? Does the site display the lowest, highest, or a middle value for that day?

I upgraded the performance of the website.