Percentage Increase Calculator
Inputs
Results
The value changed from 0 to 0, representing a 0% change.
How it works: Percent change (%): ((New − Original) ÷ Original) × 100. New value: Original × (1 + Percent/100). Original value: New ÷ (1 + Percent/100). The calculator also shows the absolute change (New − Original) and labels the result as an increase, decrease, or no change. Results are rounded only for display, preserving accuracy internally.
Overview
Need to find the percentage increase between two numbers—or the new value after a given percent rise? This percentage increase calculator gives instant answers and clear steps. Enter your original and new values to see the percent change, or switch modes to solve for the new value or the original value instead. You can fine-tune rounding with a precision slider and copy results in one click. Whether you're tracking prices, revenue, grades, or fitness metrics, the tool explains the exact formula used so you can learn while you calculate. Everything runs locally in your browser for speed and privacy.
About
About Percentage Increase Calculator
Percentage change normalizes differences so you can compare growth across scales. This calculator handles forward and reverse problems, prevents division by zero, and clarifies edge cases like −100% change. Because rounding can affect interpretation, you choose the decimal precision. The goal is transparency: every result includes the formula and your substituted numbers. A percentage increase represents how much a value has grown relative to its original amount. Unlike absolute change (which just shows the difference), percentage increase provides context by expressing the change as a proportion of the starting value.
Features:
- Calculate Percent Change: Find the percentage increase or decrease between two values
- Find New Value: Calculate what the new value will be after a percentage change
- Determine Original Value: Work backward to find the starting value
- Adjustable Precision: Choose decimal places (0-6) for displayed values
- Step-by-Step Explanations: See the exact formula and substituted numbers
- Edge Case Handling: Clear warnings for division by zero and undefined values
- Copy to Clipboard: One-click copying of results
- 100% Private: All calculations happen in your browser
FAQ
What's the difference between percent increase and percent change?
Percent change is a signed value that can be positive (increase) or negative (decrease). Percent increase specifically refers to positive growth only. This calculator uses 'percent change' terminology to handle both increases and decreases.
Why can't I compute percent change from an original of 0?
Percentage change is calculated by dividing the difference by the original value. When the original is 0, this creates a division by zero, which is mathematically undefined. The only exception is when both values are 0, in which case there's no change (0%).
Can I use negative numbers?
Yes. The calculator accepts negative values and will compute the percentage change correctly. The direction label (Increase/Decrease/No change) will reflect the actual mathematical relationship between the values.
How is rounding handled?
You control the precision using the slider (0-6 decimal places). Rounding is applied only to displayed numbers—the internal calculations maintain full precision to ensure accuracy.
Is any data sent to a server?
No. This is a completely client-side tool. All calculations happen in your browser, and no data is transmitted, uploaded, or stored anywhere.