Percentage Calculator
Calculate percentages, percentage increase, percentage decrease, reverse percentages, discounts and percentage differences instantly.
Results
How the Percentage Calculator Works
- Percentage of a Number calculates a percentage of any value.
- What Percentage Is X of Y? compares two values and returns the percentage.
- Percentage Increase and Percentage Decrease compare an original value with a new value.
- Increase by Percentage and Decrease by Percentage calculate the final value after applying a percentage.
- Reverse Percentage estimates the original value before a percentage reduction.
- Percentage Difference compares two values relative to their average.
- All calculations are performed instantly in your browser.
Continue with These Tools
Finished using Percentage Calculator? Here are some related tools that people commonly use next to complete their workflow faster.
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Gross Profit Calculator
Calculate gross profit, gross margin and markup from your cost and selling prices in seconds.
VAT Calculator
Instantly add VAT, remove VAT or extract VAT from any amount using any VAT rate.
Commission Calculator
Calculate commission earned from a sales amount and commission percentage using our free online Commission Calculator.
Break-even Calculator
Calculate the number of units you need to sell to break even using our free online break-even calculator.
How to Use the Percentage Calculator
Choose the type of percentage calculation you want to perform, enter the required values and instantly calculate percentages, percentage increases, decreases, discounts, reverse percentages and percentage differences.
Overview
The Percentage Calculator is a versatile mathematical tool designed for everyday calculations involving percentages. Whether you are calculating discounts while shopping, analysing business growth, comparing exam scores, working out VAT, measuring investment performance or solving school mathematics problems, this calculator provides fast and accurate percentage calculations. Multiple calculation modes allow you to answer virtually any percentage-related question without needing to remember formulas.
Benefits
How It Works
Select the required calculation mode.
Enter the required values.
The calculator applies the appropriate mathematical formula.
Results are calculated instantly.
Percentage values are rounded appropriately.
Additional values such as changes or differences are displayed where relevant.
Switch between calculation modes at any time.
No manual formulas are required.
How to Use This Tool
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1Select the calculation type.
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2Enter the required values.
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3Review the calculated percentage or value.
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4Adjust the values if required.
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5Switch calculation modes when performing multiple calculations.
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6Compare different scenarios.
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7Use the results for budgeting or analysis.
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8Repeat as needed.
Helpful Tips
- Use Percentage of Number to calculate X% of any value.
- Use What Percentage to compare two values.
- Percentage Increase and Decrease are useful when comparing old and new values.
- Reverse Percentage helps determine original values before discounts.
- Percentage Difference compares two values regardless of direction.
- Use the same units throughout each calculation.
- Double-check figures before making financial decisions.
- Small percentage differences can represent significant monetary values.
Common Uses
Calculate VAT.
Work out retail discounts.
Compare exam results.
Calculate salary increases.
Measure investment growth.
Calculate business performance.
Find original prices before discounts.
Analyse financial reports.
Worked Examples
The following examples demonstrate how this tool can be used in realistic scenarios.
Percentage of a number
Calculate 15% of £250 when working out a promotional discount.
Percentage increase
Compare sales increasing from £8,000 to £9,500 to determine the percentage growth.
Reverse percentage
Determine the original price of an item after a 20% discount.
Percentage difference
Compare two supplier quotations to determine the percentage difference between them.
Common Mistakes
Avoid these common mistakes to achieve the most accurate results.
- Confusing percentage increase with percentage difference.
- Using the wrong original value.
- Entering values in the wrong order.
- Confusing markup with percentage increase.
- Ignoring decimal percentages.
- Using different units within the same calculation.
- Misunderstanding reverse percentages.
- Rounding too early during manual calculations.
Glossary
Definitions of the most important terms used by this tool.
Percentage
A value expressed as parts per hundred.
Percentage Increase
The percentage by which a value has increased compared with its original value.
Percentage Decrease
The percentage reduction from an original value.
Reverse Percentage
A calculation used to determine the original value before a percentage change occurred.
Percentage Difference
A measure of the difference between two values relative to their average.
Discount
A reduction from the original price expressed as a percentage.
Original Value
The starting value before any percentage change is applied.
New Value
The resulting value after a percentage increase or decrease.
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value and multiply by 100.
How do I calculate percentage decrease?
Subtract the new value from the original value, divide by the original value and multiply by 100.
What is reverse percentage?
Reverse percentage finds the original value before a percentage increase or decrease was applied.
What is percentage difference?
Percentage difference compares two values relative to their average.
Can I calculate discounts?
Yes. The calculator can quickly calculate sale prices and discounts.
Who can use this calculator?
Students, teachers, business owners, accountants, retailers and anyone working with percentages.
Are these calculations accurate?
Yes. The calculator uses standard mathematical percentage formulas.
Things to Know
- Results are rounded appropriately.
- Minor differences may occur because of rounding.
- All calculations are performed instantly.
- Use consistent units throughout each calculation.
- Always verify important financial calculations independently.
Disclaimer
This calculator is provided for educational and estimation purposes only.
Results should be independently verified where financial or legal decisions are involved.
SwiftVecto accepts no responsibility for decisions made solely using these calculations.