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Percentage Calculator

Calculate percentages in 5 different ways. Find % of a number, percentage change, add/subtract percentages. Useful for shopping discounts, tax, marks calculation.

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20% of 500
100
Formula
20% × 500 = (20/100) × 500 = 100.00
Discount
Subtract % from price
GST/Tax
Add % to amount
Exam %
X is what % of Y
Hike/Loss
% Change
◆ How it works

Percentage Calculator — 3 simple steps

01

Pick mode

5 modes: % of, what %, change, add %, subtract %.

02

Enter numbers

Two inputs based on selected mode.

03

Get instant result

Answer + step-by-step formula explanation.

◆ FAQ

Common questions.

How do I calculate exam percentage?

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How do I calculate discount?

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How to find percentage increase?

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GST calculation?

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Frequently Asked Questions

20 questions answered · Tap to expand

● Questions in English

Open Toolzfy Percentage Calculator, enter the required input values, and see the percentage result with formula breakdown — what is X% of Y, X is what percent of Y, percentage increase/decrease instantly. No signup, no email, no installation required. Works in any browser on desktop, Android, iPhone, or tablet. Free forever with no hidden costs or daily limits.

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Frequently Asked Questions

Common questions about Percentage

Use the tool interface to input your data, get instant results. Simple and intuitive design.