Percentage Calculator
Our Percentage Calculator is a handy tool for all your percent-referenced math needs. Whether you're calculating a discount at a store, figuring out a tip at a restaurant, or analyzing financial growth, our tool provides three distinct modes to handle every scenario: Basic Percentage, Percentage Increase/Decrease (Change), and 'What percent is X of Y'. We designed this to be faster and more intuitive than a standard calculator by using 'human-language' inputs. As with all T00LZ utilities, your numbers stay private and never leave your browser.
10% of 100 is
10.00
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Why should I use this instead of my phone's calculator?
Have you ever tried to calculate a '25% increase' on a standard calculator and realized you have to do multiple steps? Our tool is built for 'human language' math. Instead of typing formulas, you just enter the starting and ending numbers, and we tell you the exact percentage change. It's built to eliminate the mental friction of common daily calculations.
Is this tool useful for business markups and profit margins?
Absolutely. Whether you're a small business owner setting prices or a shopper checking a 'buy one get 30% off' deal, our tool gives you the exact figures without the mental gymnastics. You can quickly calculate markups, discounts, and real-world results of percentage adjustments in seconds.
Do you store any of the numbers I type in here?
Never. We believe that your math—whether it's for a secret business deal or just figuring out a tip—is and should remain personal. Our 'client-side' code ensures that your inputs are processed only in your device's memory and are never sent to any server or recorded in any database.