Percentage Calculator
Work out percentages, increases and discounts instantly.
Use ToolAdd GST to a net price or strip it out of a gross price at any standard rate, with the CGST and SGST split shown separately.
Total including GST
1,180
GST at 18%
1,000
Net amount
180
GST (18%)
90 each
CGST + SGST
Adding GST multiplies the net amount by the rate. Removing GST is the reverse: divide the gross amount by one plus the rate, which recovers the original taxable value.
For sales within a single state the tax is split equally into CGST and SGST. For inter-state sales the same total is charged as a single IGST amount.
Add tax to a net price or work backwards from a tax-inclusive total.
The half-and-half split is shown for intra-state invoices.
No account, no sign-up and no daily cap — use it as often as you need.
The layout, buttons and inputs are built mobile-first and are fully keyboard accessible.
Work out percentages, increases and discounts instantly.
Use ToolFind an exact age in years, months and days.
Use ToolEstimate monthly loan instalments and total interest.
Use ToolBrowse every calculators or see the full tool list.