Calculateur de Percentage Increase/Decrease
Calculate the percentage change between an original and a new value.
Formula and method
This calculator computes Percentage change directly in your browser without sending data to an external server.
Mathematical formula
- Percentage change:
((newValue-original) ÷ original) × 100
Variables and parameters
- Original value (original): default value 80.
- New value (newValue): default value 100.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Percentage Increase/Decrease Calculator use?
Percentage Increase/Decrease Calculator evaluates outputs such as <strong>Percentage change</strong> based on inputs including Original value, New value. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Percentage Increase/Decrease Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Percentage Increase/Decrease Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Percentage Increase/Decrease Calculator free to use?
Yes. Percentage Increase/Decrease Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Percentage Increase/Decrease Calculator store or upload my data?
No. Percentage Increase/Decrease Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Percentage Increase/Decrease Calculator?
Percentage Increase/Decrease Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Percentage Increase/Decrease Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Percentage Increase/Decrease Calculator to your own blog post or page.