Home Growth Decline Change Percent Off Sales Tax VAT

Use Our Percent Calculator Collection

We offer a free suite of fast & easy-to-use online tools to calculate percentages. Instructions for using all calculators appears at the bottom of the page.

Usage instructions

Select from the calculators below to quickly solve your percentage problems. The calculations help you find

Descriptions of each & the associated formulas are shared below.

Percentage Of

X% of Y = Z

What is % of ?
 
 

Formula: X% * Y / 100 = Z
where

  • X = some percent
  • Y = the number you want to figure a percentage of
  • Z = the final number associated with X percent of Y

Example use cases:

  • splitting a bill: 50% for 2 people, 33.33% for 3, 25% for 4, 30% for 5
  • adding a tip: typically around 10% to 20%, depending on the service and location

What Percent?

Y is Z% of X

is what percent of ?
 %
 

Formula: 100 * X / Y = Z%
where

  • X = the original number
  • Y = the number you want to see expressed as a percentage of X
  • Z = the percentage of X that Y represents

Example use cases:

  • figure how many questions you can get wrong on an exam and still have a passing grade
  • know how many units of work you need to do in order to do your fair share

Percent Change

X to Y is Z% change

What is the percentage increase/decrease
from to ?
 %


 

Formula: 100 * (Y - X) / X = Z%
where

  • X = original number
  • Y = final resulting number
  • Z = percent change between X and Y

Example use cases:

  • project changes in sales or profits for a business
  • verify discount percentages on items which are allegedly on sale

Price With Sales Tax

Y% sales tax added to $X = $Z

What is the final price with tax
% tax on $ ?
$ tax
$ total  
 

Sales Tax Formula: Y% * $X / 100 = $Z
where

  • X = retail price excluding sales tax
  • Y = sales tax %
  • Z = sales tax amount

Total Price Formula: $X * (1 + (Y%/100) = $Z
where

  • X = retail price excluding sales tax
  • Y = sales tax %
  • Z = price inclusive of sales tax

VAT Calculator

$X - Y% VAT = $Z

What is the price of an item before VAT
% VAT total $ ?
$ VAT
$ before VAT
 

VAT Exempt Pricing Formula: $X * ((100 - Y%) / 100) = $Z

where

  • X = final price
  • Y = VAT %
  • Z = VAT exempt price

VAT Formula: $X * (1 - (1 - Y%/100)) = $Z

where

  • X = final price
  • Y = VAT % as a decimal
  • Z = VAT amount

Discounted Price

Y% off of $X = $Z

What is the final price of an item on sale
% off $ ?
$ off
$ sale price
 

Discount Price Forumla: (X% / 100) * Y = Z
where

  • X = percent off, in percent
  • Y = original retial price
  • Z = sale price

Discount Amount Formula: Y * (100 - X%) / 100 = Z
where

  • X = percent off, in percent
  • Y = original retial price
  • Z = discount amount