GST Calculator is save your time to calculate GST. because Its just one click adding gst or removing gst. Its give you five gst options:
3% , 5% , 12% , 18% , 28%

You can choose anyone and see result. When you choose anyone gst option its give details of Gst like If you want to add GST so you choose +18% Gst of 100 then its show like this:

= 118

IGST 18% = 18
CGST 9.0% = 9
SGST 9.0% = 9

If you want remove GST so you choose -18% GST of 100 then its show like this:

=84.7458

IGST 18% = 15.2542
CGST 9.0% = 7.6271
SGST 9.0% = 7.6271

and also you can use this calculator as a simple calculator like add, subtract, multiply, divide and percent calculation.