Price Percentage Change Calculator
Instantly calculate price increases (inflation/markup) or decreases (discounts). Toggle between calculating the new price or finding the percentage difference.
About
Retailers, investors, and shoppers use percentage change calculations to quantify price volatility or margin adjustments. This tool isolates the relative difference between an initial value and a final value. Accurately determining these percentages is critical for setting profit margins in retail or tracking asset performance in finance. A common error involves confusing markup (based on cost) with margin (based on revenue). This utility focuses strictly on the mathematical delta between two price points, handling both positive growth and negative corrections (discounts) with high decimal precision.
Formulas
The standard formula for percentage change Δ% compares the difference relative to the starting value Vold.
When applying a known percentage P to find a new price:
Reference Data
| Scenario | Old Price | New Price | Formula Result |
|---|---|---|---|
| Price Hike | 100 | 150 | +50% |
| Discount | 100 | 75 | −25% |
| Doubling | 50 | 100 | +100% |
| Total Loss | 100 | 0 | −100% |
| Inflation | 1.00 | 1.03 | +3% |
| Reversal | 100 → 150 | 150 → 100 | −33.3% |