Percentage Calculator
Calculate percentages, increases, decreases, and differences
Suggested Next Steps
Related Tools
Mortgage Calculator
Calculate monthly mortgage payments with amortization schedule
Compound Interest Calculator
Calculate compound interest with regular contributions
Loan / EMI Calculator
Calculate EMI payments for any loan type
Retirement Calculator
Plan your retirement savings and estimate future income
Tip Calculator
Calculate tip amount and split the bill
ROI Calculator
Calculate Return on Investment and annualized returns
How to Use
Enter Your Values
Fill in the input fields with your numbers or parameters.
Get Instant Results
Results update automatically as you type — no submit button needed.
Copy or Save
Copy results to clipboard or use them in your workflow.
Why Use This Tool
100% Free
No hidden costs, no premium tiers — every feature is free.
No Installation
Runs entirely in your browser. No software to download or install.
Private & Secure
Your data never leaves your device. Nothing is uploaded to any server.
Works on Mobile
Fully responsive — use on your phone, tablet, or desktop.
Percentages are everywhere in personal finance — from sales tax and discounts to interest rates and investment returns. Mastering percentage calculations helps you make better financial decisions daily.
Key Concepts
Percentage Change
Understanding how to calculate percentage increases and decreases helps you evaluate investment returns, salary raises, and price changes accurately.
Markup vs. Margin
Markup is the percentage added to cost to get the selling price. Margin is the percentage of the selling price that is profit. A 50% markup equals a 33.3% margin.
Compounding Percentages
A 50% gain followed by a 50% loss doesn't return you to breakeven — it leaves you at 75% of your original amount. Percentage gains and losses are not symmetric.
Basis Points
In finance, 1 basis point equals 0.01%. A rate change from 4.50% to 4.75% is a 25 basis point increase. This precision matters for large sums.
Practical Tips
When comparing discounts, convert everything to the actual dollar amount saved — a 20% discount on a $50 item saves more than a 30% discount on a $30 item.
Remember that percentage returns on investments must be evaluated alongside the time period and risk involved.
Use percentage calculations to quickly assess whether a bulk purchase actually saves money compared to buying individual items.
This content is for educational purposes only and does not constitute financial advice.