Skip to content
Vekbox logoVekbox Tools

Percentage Calculator

x% of y / Increase / Decrease
Base (y)
Percent (x%)
x% of y
0
Increase y by x%
0
Decrease y by x%
0
Discount
Original
Discount %
Amount off
0
Final price
0
Markup / Margin
Cost
Price
Markup %
Margin %
Fill in any two items (such as Cost+Price or Cost+Markup), and the rest will be calculated automatically.
Cost
0
Price
0
Markup %
Margin %
Percentage Change
Old
New
Rate % (optional)
Delta (New − Old)
0
Old increased by Rate %
0
Old decreased by Rate %
0
Given New (after increase), find Old
0
Reverse Percentage
Part (A)
Whole (B)
Percent (P%)
Given B and P%, Part
0
Tax (Add / Remove)
Rate %
Net (excl.)
Gross (incl.)
From Net + Rate
Gross: 0Tax: 0
From Gross − Rate
Net: 0Tax: 0

Options

Display
Only affects display (not internal math).

About Percentage Calculator

One place for common percentage math: “x% of y”, discounts, markup vs margin, percent change, reverse percentage, and tax add/remove. All results update instantly as you type.

  • Markup is over cost; Margin is over price. 25% markup ≠ 25% margin.
  • Reverse: fill any two fields to solve the third.
Related Tools
About this collection

Each page is built around one practical task. Enter what you need, review the result, and use the actions provided by the tool.

What to expect

  • Inputs and results kept together
  • Layouts that adapt to smaller screens
  • Direct links for returning to a tool
  • No account needed for the listed utilities

Need something else? Request a tool.