Price Percentage Change Calculator – Compare Old and New Prices
This calculator finds the percentage change between any two prices — ideal for checking discounts, price increases, subscription changes, or comparing how much a product’s cost has shifted over time. It uses the standard percentage change formula, where the **old price** is the reference point and the **new price** shows the updated cost. This makes it useful for: - sale price comparisons - subscription or membership price changes - retail price drops or increases - renewal price changes - evaluating price trends over timePrice Percentage Change Formula
To calculate the percentage change between two prices, use:
Where: - **old price** = original cost - **new price** = updated cost - a **negative result** means a price drop - a **positive result** means a price increase
Examples of Price Percentage Change
Example 1: Price dropA laptop’s price drops from $899 to $799.
(799 − 899) / 899 × 100 = −100 / 899 × 100 = −11.12
The price dropped by 11.12%.
Example 2: Subscription price increase
A streaming subscription increases from $9.99 to $12.99 per month.
(12.99 − 9.99) / 9.99 × 100 = 30.03
The price increased by about 30%.
Example 3: Comparing two independent prices
Two sellers quote different prices for the same used car: $14,500 and $13,200.
Since neither price is “before” or “after,” this is not a percentage change — it is a **percentage difference**.
Use the percentage difference calculator instead:
|14500 − 13200| / ((14500 + 13200)/2) × 100 = 9.39%
The percentage difference between the two quotes is 9.39%.
When to Use This Calculator
Use this calculator when there is a clear **old price** and **new price**, such as: - a sale or discount - a price increase over time - a subscription renewal - a product price update - a before/after comparison If you are comparing two unrelated prices (e.g., two stores, two quotes), use the percentage difference calculator instead.Frequently Asked Questions
Does this work for percentage discounts?Yes. A lower new price simply produces a negative percentage, which represents the discount.
Can I use this for currencies other than dollars?
Yes. The calculation is currency‑independent — just enter both prices in the same currency.
What if I only know the discount percentage and the sale price?
Use the reverse percentage change calculator to find the original price.
Related tools: percentage difference calculator & percentage change calculator.