I have a amount without 20% Tax in my country.. For example, 12,24 € it s without tax and 14,70 EUR it's with a TAX.
How can I add 20% to 12.24 EUR Amount in PHP?
My script is:
<? echo round($cena*(20/100)+$cena, 2);?>
But with this script is amount with TAX 14,40 EUR and in real it is 14,70 EUR.
Where is problem? And numbers with zero at start it don't calulcate.. It will show 0,- EUR.
Thanks.
Use this
$num = 12.24;
$percentage = 20;
$num += $num*($percentage/100);
$num = round($num, 1); // 4
$num = sprintf('%0.2f', $num);
echo $num;
As mentioned in comments, just multiply that number by 1.2. So:
<?php echo round($cena * 1.2, 2); ?>
if you use calculator to solve it, 14.70 is correct. to get 14.40
<?php echo round($cena * 0.18, 2); ?>
0.18 is 18%
But with this script is amount with TAX 14,40 EUR and in real it is 14,70 EUR. Where is problem?
The problem is with the format of your input, 12,24. It is treated as 12. This is probably because PHP expects the decimal point to be . and not ,.
Related
I have a simple code in php and would like to add 3% on bitcoin value:
</PHP
$price = "0.00001000"
$price_format = str_replace(".", "", $price);
echo ($price_format + ($price_format / 100 * 3)); // 1030
?>
Return of my code:
1030
I need the return to be:
0.0001030
Does anyone know how I can perform this calculation by following the number of houses of the price?
You can use number_format when you multiply on the 3 percent to keep decimal places intact. Multiply price by 1.03 (3%) and specify 8 decimal places.
<?php
$price = 0.00001000;
$new_price = number_format($price * 1.03, 8);
echo $new_price;
Here's a link to number_format for more info:
https://www.php.net/manual/en/function.number-format.php
I have a shop where the client enters the product price with the tax in his country. When i save it i need to remove the tax and keep only the base.
When i calculate the tax back for the clients from the same country in some cases the total price will be different with 0.01 , 0.03 then the original price.
I tried to calculate with 2 to 4 digits but it never works on all cases.
Ex: price with tax = 157, tax is 7.7% => base = 145.78 and tax amount 11.22
When i calculate the tax to the previous price base i get this:
Base: 145.78 , tax is 7.7% => 11.23 = price is 157.01
Php code i use:
$baseprice = round($fullprice / (1+($taxperc/100)),2);
On the frontend:
$tax = round($baseprice * ( $taxperc / 100 ),2);
$total = $tax + $baseprice;
Anyone have a suggestion about how to fix this ?
Thanks!
Update: after some research I found a solution is to use round with PHP_ROUND_HALF_EVEN
Update2: first solution doesnt work. 1-9 works fine, 10 -tax + tax =10.01
Today's solution would be to work on the back with full number of digits ( for base price, tax and total ) and only when display for user to round it. :)
Seems ( not 100% sure yet, i need to test more ) a solution is to use the banker's rounding PHP_ROUND_HALF_EVEN
$baseprice = round($fullprice / (1+($taxperc/100)),2 , PHP_ROUND_HALF_EVEN);
$tax = round($baseprice * ( $taxperc / 100 ),2 , PHP_ROUND_HALF_EVEN);
$total = $tax + $baseprice;
I've got a significant problem in working out the percentage tax applied to a product, due to the rounding.
For example:
If you have a product which is £1.00 including 20% tax the break down would be:
0.83 ex tax
0.17 tax
1.00 total
However, if you work out the percentage increase:
round( (( ( 1 - 0.83 ) / 0.83 ) * 100), 2);
The answer is 20.48, because the actual price ex VAT is 0.8333333333
Therefore if you calculate:
round( (( ( 1 - 0.8333333333 ) /0.8333333333 ) * 100), 2);
You get the correct answer of 20.
In this case it would obviously work to round the 20.48 down to 20, but thats not a solution because some tax rates are to 2 decimal places so the assumption can't be made that you can just round the tax rate.
Am I missing something or is this impossible without knowing the original tax percentage?
0.17 is not 20% of 0.83, so your basic assumption is inaccurate( is rounded :P ).
Don't round money, calculate it without all that rounding and display rounded if need be. That avoids having to loose the precision in calculations.
A simple test will demonstrate
$price=0.8333333333;
$taxRate=21.25;
$tax=$price*$taxRate/100;
$total=$price+$tax;
$calculatedTaxRate=(($total-$price)/$price)*100; // 21.25
Since we didn't round anywhere, we can reverse engineer the tax rate always down to the dot.
Try with 20%
$price=0.8333333333;
$taxRate=20;
$tax=$price*$taxRate/100;
$total=$price+$tax;
$calculatedTaxRate=(($total-$price)/$price)*100; // 20
Wouldn't it something like:
17% VAT
85.47 taxless
85.47x0.17 = 14.53
Total: 100
So 100/1.17 = 85.47
My little-and-dirty version:
$taxrate=22; // 22%
$price=100;
$priceMinusTax=($price/(($taxrate/100)+1));
As long as you are dealing with low precision numbers, you will get a low precision answer. If you must show low precision numbers, you can round them when you show them to the user in the view, but save them as high precision numbers in the database.
Assuming your total price is £1 and tax rate is 20%:
$vatDecimal = (float) 1 + (20 / 100);
$priceExclVAT = round((1.00 / $vatDecimal), 2);
$priceDisplay = number_format($priceExclVAT, 2, ',', '.');
echo $priceDisplay;
The user enters the total amount and tax. Sometime its come form database, we can also use this code.
$actualPrice = "";
$total = 1000;//User Entry Total Amount
$gst = 18;//User Entry GST Tax %
$calculateTax = 100+$gst;
$calculateAmount = $total*100;
$actualPrice = $calculateAmount/$calculateTax;
echo $actualPrice = round($actualPrice,2);
echo $gstAmount = round($total-$actualPrice,2);
Im trying to make a calculation with the following values:
Product cost (without VAT) = 12,40 ($product)
The VAT percentage = 21%, what I will store in the database as 0,21 ($vat_perc)
The VAT is 2,604 ($vat)
edit: The VAT is per product
When I try to get the total then I get 15,00 ($total)
What I did is the following:
$total = $product + $vat
This will echo 15.004
Then I use the number_format:
echo(number_format($total,2,',','.'));
This will print 15.00
But then I want to multiply the product with 2
So that will give the following calculation:
$total = $product * 2 + $vat
Then again I use the format:
echo(number_format($total,2,',','.'));
Then the total = 30,01
I tried serveral things like ROUND en INT, but with no succes.
What am I doing wrong in this? In know that the VAT is the evil one here but I have no idea how to fix this.
$tax = round( ($price / 100) * 3.8, 2);
tax is rounded price divided by the 100 to make a clear percentage. Multiplied by the wanted stack
then you do the addition to or from your price table.
Well good to have you on the phone - maybe we can solve this faster by phone. Thank god for phones!
Cheers mate!
Here are some examples of how the numbers are rounded with PHP functions.
$product = 12.40;
$vat = 2.644;
$total = ( $product + $vat ) * 2;
var_dump( $total ); // float(30.088)
var_dump( number_format($total,2,',','.') ); // string(5) "30,09", rounded
var_dump( round( $total, 2 ) ); // float(30.09), rounded
var_dump( sprintf('%0.2f', $total ) ); // string(5) "30.09", rounded
var_dump( floor( $total * 100 ) / 100 ); // float(30.08), not rounded
All three founctions ( number_format, round, sprintf ) will round the result, to avoid the rounding and discard the decimal part after two decimal points you can use the last example.
Your initial total is 15.004 so when you call number_format that gets rounded down to 15.00. Now when you multiply by 2 your total is 15.008 which number_format will round up to 15.01. The issue isn't with the addition it is with the multiplication by 2. number_format rounds to the nearest place which for your case would be 30.01.
If you want the number to be rounded down all the time use floor, like so:
$total = floor(($product * 200)) / 100 + $vat;
echo(number_format($total,2,',','.'));
How would l take the following and make a calculation that would be :
TOTAL * 2 / 100 and SHOW in decimal place (£) pounds.
So example 1000 (TOTAL) would be £20.00
£<?php echo number_format( ($total * 2) / 100, 2); ?>
number_format — Format a number with grouped thousands
http://php.net/manual/ru/function.number-format.php