The Calculator App
Percentage
Calculator App
Free percentage calculator app. Calculate percentage of a number, percentage increase, percentage decrease, and percentage difference. No download. Works on iPhone and Android.
Percentage and discount tools in the app
Percentage Calculator
Percentage of, increase, decrease and difference
Percentage Change Calculator
Calculate the % change between any two numbers
Discount Calculator
Find the final price after any percentage discount
VAT Calculator
Add or remove 20% UK VAT from any price instantly
Tip Calculator
Split bills and calculate gratuity for any service
Cashback Calculator
Calculate annual cashback from credit card spending
The three percentage formulas
Percentage of a number
15% of £240 = (15 ÷ 100) × 240 = £36
Percentage increase
£80 → £100 = ((100−80) ÷ 80) × 100 = 25% increase
Percentage difference
50 vs 70 = (20 ÷ 60) × 100 = 33.3% difference
Frequently asked questions
Is there a free percentage calculator app?
Yes. The Calculator App includes a free percentage calculator that works on iPhone and Android with no download. Calculate percentage increases, decreases, differences, and find what percentage one number is of another.
What is the best percentage calculator app?
The best percentage calculator app handles all three core calculations in one place: percentage of a number, percentage increase/decrease, and percentage difference between two values. The Calculator App does all of these instantly, free, with no sign-up.
How do I calculate a percentage increase?
Percentage increase = ((New Value − Old Value) / Old Value) × 100. For example, a price rising from £80 to £100 is a 25% increase: ((100 − 80) / 80) × 100 = 25%.
How do I calculate a percentage of a number?
Percentage of a number = (Percentage ÷ 100) × Number. For example, 15% of £240 = (15 ÷ 100) × 240 = £36.
Does the percentage app work for VAT calculations?
For quick percentage maths, yes. For dedicated UK VAT (adding or removing 20%), the app also includes a standalone VAT Calculator that splits net amount, VAT, and gross price.
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