About This Tool
The ToolBlaster Percentage Calculator was built to solve a simple problem: most online calculators are cluttered, slow, and confusing. We wanted to create a utility that feels professional, works instantly, and respects your time.
Design Philosophy
Fast & Reactive
No "Calculate" buttons. Results appear instantly as you type, allowing for rapid-fire calculations and "what-if" scenarios.
Privacy First
This tool runs 100% in your browser. No data is sent to any server. Your financial or personal numbers stay on your device.
Distraction-Free
We removed the fluff. No pop-ups, no newsletters, and no complex menus. Just the 6 most common percentage formulas.
Laptop Optimized
Designed to show all calculators at once on standard screens, reducing the need to scroll while working.
Understanding the Modules
We've organized the 6 calculators into two distinct categories for clarity:
1. Finding Values
For when you have known numbers and need to find a missing part.
- What is X% of Y?
Standard tip or tax calculator. - X is what % of Y?
Understand proportions (e.g., scores). - Find Total:
Reverse calculations (e.g., original price).
2. Calculating Change
For measuring movement between two numbers.
- % Increase / Decrease
Track growth or loss over time. - % Difference
Precise comparison relative to a specific value.