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.
For general percentage calculations, visit the percentage calculator homepage.
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.