What types of percentage calculation does it support?

Three: finding a percentage of a number (e.g. 20% of 450), finding what percentage one number is of another (e.g. 90 is what % of 360), and finding the percentage change between two values (e.g. from 50 to 75).

Can I use it to calculate a tip or a discount?

Absolutely. Use '% of a number' mode to find any percentage amount — type the tip or discount percentage and the original total to get the exact figure.

Does it work without internet access?

Yes, fully. All calculations happen in your browser with no network required, so it works offline just as well as online.

Does it show the working or just the answer?

It shows a clear result label explaining the equation (e.g. '20% of 450 = 90'), so you can always see at a glance what was calculated.

Percentage Calculator

WEB

Work out percentages, increases, decreases and 'what percent' in one tap.

Percent (%)

Of value

What it does

Carbide's Percentage Calculator makes percentage problems instant and effortless. It handles three everyday scenarios in one place: find what a percentage of a number is ('15% of 200'), work out what percentage one number is of another ('45 is what % of 180'), and calculate the percentage change between two values ('from 80 to 100 is +25%'). Just pick the mode you need, fill in the two numbers, and the answer appears straight away — no mental gymnastics needed. The tool is completely free, works fully offline, requires no sign-up, and runs entirely on your device so nothing you enter is ever shared. It's ideal for working out tips, test scores, price changes, growth rates, or any other percentage you come across day to day.

How to use the Percentage Calculator

Open the Percentage Calculator in Carbide.
Choose the calculation mode: '% of a number', 'is what %', or '% change'.
Enter the two numbers in the input fields provided for your chosen mode.
Read the result — it appears instantly as you type, no button press needed.
Switch modes at any time to solve a different type of percentage problem.

Frequently asked questions

What types of percentage calculation does it support?: Three: finding a percentage of a number (e.g. 20% of 450), finding what percentage one number is of another (e.g. 90 is what % of 360), and finding the percentage change between two values (e.g. from 50 to 75).
Can I use it to calculate a tip or a discount?: Absolutely. Use '% of a number' mode to find any percentage amount — type the tip or discount percentage and the original total to get the exact figure.
Does it work without internet access?: Yes, fully. All calculations happen in your browser with no network required, so it works offline just as well as online.
Does it show the working or just the answer?: It shows a clear result label explaining the equation (e.g. '20% of 450 = 90'), so you can always see at a glance what was calculated.

Take Carbide everywhere

All 111 tools, offline, on iOS & Android — free.