ROI Calculator
CalculatorsMulti-Mode Percentage & ROI Calculator
Calculate percentages, discount savings, and price markups quickly.
Launch ROI CalculatorOpens full original application in separate tab
About ROI Calculator
ROI Calculator is an all-in-one multi-mode calculation engine designed for students, shoppers, accountants, and business owners. Calculate what X% of Y is, percentage increase or decrease, markup calculations, and reverse percentages with instant formula explanations.
How to Use ROI Calculator in 3 Simple Steps:
1
Choose Mode
Select the calculation formula you need (Discount, Increase, What % of, etc.).
2
Enter Numbers
Input your values — calculations update immediately.
3
View Breakdown
Read the formula breakdown and copy your exact numerical answer.
Key Features & Specifications
Multi-mode calculations: What is X% of Y, Percentage Change, Markup, and Discounts
Step-by-step mathematical explanation showing formulas and fraction conversions
Instant calculation as you type with zero delay
Quick copy results to clipboard and interactive confetti on milestone calculations
Financial examples for taxes, tips, sales discounts, and investment gains
Frequently Asked Questions
Subtract the original value from the new value, divide the difference by the original value, and multiply by 100.
Independent Tool Engine
This tool runs independently in its own environment, completely free of any PanotiTools directory styling or scripts.