Percentage Increase/Decrease Calculator

Percentage Increase/Decrease Calculator – Understand Change Instantly

Whether you're tracking investment returns, price adjustments, salary hikes, or sales figures, understanding the percentage change is essential. Our Percentage Increase/Decrease Calculator makes it easy: enter your original value and new value, and instantly see whether there's a gain or loss, and by what percentage. A visual chart helps you see the scale of change clearly.

Why Percentage Change Matters

  • 📊 Investors use percentage change to evaluate returns.
  • 💰 Businesses compare hip costs and track profit/loss.
  • 📈 Helpful for educators showing growth or decline trends.
  • ⌛ Consumers use it to understand discounts and markups.

How to Use the Calculator

  1. Enter the original value (e.g., ₹1,000 or $100).
  2. Enter the new value (e.g., ₹1,200 or $120).
  3. The tool calculates absolute change and percentage.
  4. It displays whether it's an increase or decrease.
  5. A doughnut chart visualizes the components.

Understanding the Formula

We use the standard formula:
Percentage Change = (New – Original) ÷ Original × 100%

If the new value is higher, it's a positive change (increase); if lower, it's a negative change (decrease).

Tips & Use Cases

  • ✔️ Always ensure original value isn't zero; calculator avoids division by zero.
  • ✔️ Convert decimals to percentage form (e.g., 1.2 = 120%).
  • ✔️ Compare monthly expenses, traffic stats, stock prices, etc.
  • ✔️ Businesses track price change over time or discount impact.

FAQs – Percentage Increase/Decrease Calculator

1. What if the original value is zero?

The percentage change formula requires division by the original value. If it’s zero, percentage change is undefined—please enter a non‑zero original value.

2. Can it handle currency values?

Yes. Just enter numeric values; the calculator formats results using your browser’s locale currency format.

3. Will results update live?

Yes. As you adjust input fields or sliders, the result and chart update instantly—no need to click a button.

4. Is it possible to get negative percentage?

We convert negative change into a positive decrease percentage and label it accordingly. So, you'll see “Decrease: 20%” rather than “-20%”.