Profit margin
Profit as a percentage of the selling price.
Margin = Profit ÷ Selling price
$160 cost → $240 sale33.33%
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Percentage, Margin & Markup Calculator
Eight useful percentage calculations in one clear workspace. Calculate margins, markups, discounts, tax and percentage changes instantly.
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Live calculation
What is a percentage of a number?
%
Ready when you are—
Enter both values to see the result.
Formula
Your calculation will appear here.Results update automatically
Know the differenceMargin and markup are related—
Margin and markup are related—
but they are not the same.
Both measure profit, but from different starting points. Utilaroo keeps the distinction visible so you can price with confidence.
Markup
Profit as a percentage of the cost price.
Markup = Profit ÷ Cost price
$160 cost → $240 sale50.00%
How to use the calculator accurately
Select the calculation that matches the question you are trying to answer, enter the two values and review the result together with its formula. The answer updates as you type, so you can test different prices, rates and scenarios without repeatedly pressing a calculate button.
Percentage increase and decrease
Percentage change compares the difference between a starting value and a new value with the starting value. A move from 200 to 240 is an increase of 20%. A move from 240 back to 200 is a decrease of 16.67%, because the starting point is different.
Reverse percentage calculations
Use reverse percentage when you know the final amount and the rate of change but need the original value. For example, if a price is $240 after a 20% increase, the original price was $200—not $192. The calculator divides by the growth factor rather than simply subtracting 20%.
Tax and GST
The tax tool can add a custom rate to a tax-exclusive price or remove it from a tax-inclusive price. The 10% default is convenient for Australian GST, but you can replace it with the rate relevant to your transaction and jurisdiction.
Important: Results are mathematical estimates for general information. Confirm tax, accounting and pricing decisions against the rules that apply to you.
Questions answered
Percentage calculator FAQ
What is the difference between margin and markup?
Margin measures profit against the selling price, while markup measures profit against the original cost. With a $160 cost and $240 selling price, the profit margin is 33.33% and the markup is 50%.
Why is reversing a 20% increase not the same as subtracting 20%?
The increase and decrease use different starting values. To reverse an increase, divide the final value by 1 plus the percentage rate expressed as a decimal.
Does Utilaroo store the numbers I enter?
No. The calculator performs its calculations locally in your browser. Your entered values are not submitted to Utilaroo.
Can I use a tax rate other than Australian GST?
Yes. Replace the default 10% rate with any percentage. The tool performs the arithmetic but does not determine which tax rate legally applies.
Method, example and limitations
Understand the result before using it
Use this calculator when the relationship between two numbers matters: a rate applied to an amount, a change from one value to another, or profit measured against cost or selling price. It performs arithmetic only; it does not determine which tax, accounting or pricing rule applies to a transaction.
What the tool does
Percentage-of calculations multiply the amount by the rate divided by 100. Percentage change divides the difference by the original value. Margin divides profit by selling price, while markup divides the same profit by cost. Reverse calculations divide by the completed growth or discount factor instead of subtracting the displayed percentage.
$160 cost and $240 selling price
- Profit is $240 − $160 = $80.
- Margin is $80 ÷ $240 × 100 = 33.33%.
- Markup is $80 ÷ $160 × 100 = 50%.
How to read it: The two percentages describe the same $80 profit from different starting points. Use margin when the selling price is the denominator and markup when the cost is the denominator. For Australian GST, confirm that the supply is taxable before using the usual 10% rate.
- Entered values use the same currency or unit.
- Rates remain constant for the individual calculation.
- Rounding is applied only for display; the underlying calculation keeps full precision.
- Treating margin and markup as interchangeable.
- Reversing an increase by subtracting the same percentage.
- Assuming a mathematical tax result establishes legal tax treatment.
Use current primary information for decisions affected by laws, tariffs, product specifications or professional standards.