Stock Percentage Increase Calculator
Calculate the stock percentage increase between old and new share prices instantly. Enter the purchase price and the current price to get the stock gain percent and the dollar amount per share, with the formula and a step-by-step explanation.
Stock Percentage Increase
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A positive number is a gain; a negative number means the current price is below the purchase price.
What is a stock percentage increase calculator?
A stock percentage increase calculator measures how much a share price has risen between two prices, expressed as a percentage of the purchase price. It answers the question: by what percentage did this stock go up? It is used for position evaluation, annualized return, and benchmark comparisons.
The formula is ((current price − purchase price) / purchase price) × 100. The gain is divided by the purchase price, so the result is always relative to your entry point. The stock percentage increase calculator applies this automatically and returns both the percentage and the dollar gain per share.
Tracking the stock percentage increase matters because a flat dollar gain hides the real return. A 10-dollar gain means very different things on a 50-dollar stock and a 500-dollar stock. Expressing the change as a percentage lets you compare performance across positions, sectors, and the broader market.
How to calculate a stock percentage increase
- 1
Enter the purchase price
Type the price you paid per share — your entry point for the position.
- 2
Enter the current price
Type the current market price you want to compare against the purchase price.
- 3
Read the stock gain percent and amount
The calculator applies ((current price − purchase price) / purchase price) × 100 and shows the stock percentage increase plus the dollar gain per share.
Why use this stock percentage increase calculator?
Instant and accurate
No manual arithmetic or spreadsheet formulas. Get the exact stock gain percentage the moment both prices are entered.
Works for any position
Use it for a single share or compare across positions — the per-share percentage is the same either way.
Private by design
The math runs in your browser. Your holdings and prices are never uploaded to a server.
FAQ
Frequently Asked Questions
Quick answers to common questions about percentage calculations.
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