Is Konnect2Tools free?

Yes. These in-browser tools are completely free to use with no account required for core functionality.

Do my files leave my device?

Browser document operations run locally, except where the operation uses an external service, such as AI summarisation. Read the processing note before using sensitive inputs.

Is the Percentage Calculator tool safe to use?

Local operations process document content on your device. External-service operations may send inputs as described in the processing note. Keep originals and inspect the output.

What is the difference between percentage change and percentage points?

If interest rate goes from 8% to 10%, the change is 2 percentage points (absolute difference), but 25% increase (relative change). When discussing rate changes, 'percentage point' is the correct term for absolute changes, while '%' refers to the relative change. This distinction is critical in financial reporting.

How do I calculate percentage of marks?

Percentage = (Marks obtained / Maximum marks) × 100. For example: 450/600 = 75%. For multiple subjects, total all marks obtained and total all maximum marks, then apply the formula. Do not average individual subject percentages as they may have different maximum marks.

How do I find the original price before discount?

Use reverse percentage: Original price = Discounted price / (1 − Discount%/100). If you paid ₹720 after 10% discount: Original = 720 / 0.90 = ₹800. This is also used to find base price before GST was added (base = inclusive / (1 + GST/100)).

How is compound annual growth rate (CAGR) different from simple % change?

Simple % change = (End − Start)/Start × 100. CAGR accounts for compounding: CAGR = (End/Start)^(1/years) − 1. For investments, always use CAGR for multi-year returns. A ₹1L growing to ₹2L in 6 years is not a 100% return — it's a 12.25% CAGR.

Unit & Everyday Converters

Percentage Calculator

Calculate percentage of a number, percentage change, and increase or decrease.

Run Percentage Calculator online

In-browserDocument processing runs on your device. External resources may still load.

Enable JavaScript to use the interactive tool. Read the instructions, limitations and FAQs below before starting.

The Percentage Calculator provides four essential percentage operations in one tool: find X% of a number, calculate percentage change between two values, find what percentage one number is of another, and reverse-calculate the original from a known percentage. These operations appear daily in finance, shopping, examination marks, business analytics, tax calculations, and scientific measurements.

Percentages are fundamental to financial literacy in India. EMI calculations, GST computations, interest rate comparisons, mutual fund returns, insurance premium discounts, and school examination scoring all rely on percentage arithmetic. A clear understanding of the difference between percentage points and percentage change prevents costly misinterpretations — a fund that moves from 10% to 12% allocation has grown by 20%, not 2 percentage points.

Our calculator's four modes cover virtually every percentage scenario: Mode 1 (X% of Y) for calculating discounts, commissions, and tax amounts; Mode 2 (% change) for comparing values over time; Mode 3 (X is what % of Y) for mark percentage and contribution analysis; Mode 4 (reverse %) for finding the original price before a discount was applied.

How to use this utility

Use the controls below—paste text, pick files, or adjust options as described on the tool.
Click the main action button. Processing runs in your browser on this device.
Download or copy the output. Check the processing note for any external services used by this operation.

Common use cases

Calculating exam scores and grade percentages from raw marks
Finding original price before a sale discount was applied
Computing GST amount as a percentage of the base price
Measuring year-on-year revenue or profit growth in percentage terms
Calculating salary hike percentage and new CTC

Tips for best results

1Distinguish between percentage change and percentage points — critical in interest rate discussions
2For compound growth, use (Final/Initial)^(1/years) − 1 for CAGR, not simple % change
3To find the original price: if ₹800 is after 20% discount, original = 800 / 0.8 = ₹1,000
4Margin % = profit/revenue × 100; Markup % = profit/cost × 100 — they are different
5Excel's PERCENTAGE function applies formatting only — the arithmetic is the same as manual calculation

Frequently asked questions

Is Konnect2Tools free?: Yes. These in-browser tools are completely free to use with no account required for core functionality.
Do my files leave my device?: Browser document operations run locally, except where the operation uses an external service, such as AI summarisation. Read the processing note before using sensitive inputs.
Is the Percentage Calculator tool safe to use?: Local operations process document content on your device. External-service operations may send inputs as described in the processing note. Keep originals and inspect the output.
What is the difference between percentage change and percentage points?: If interest rate goes from 8% to 10%, the change is 2 percentage points (absolute difference), but 25% increase (relative change). When discussing rate changes, 'percentage point' is the correct term for absolute changes, while '%' refers to the relative change. This distinction is critical in financial reporting.
How do I calculate percentage of marks?: Percentage = (Marks obtained / Maximum marks) × 100. For example: 450/600 = 75%. For multiple subjects, total all marks obtained and total all maximum marks, then apply the formula. Do not average individual subject percentages as they may have different maximum marks.
How do I find the original price before discount?: Use reverse percentage: Original price = Discounted price / (1 − Discount%/100). If you paid ₹720 after 10% discount: Original = 720 / 0.90 = ₹800. This is also used to find base price before GST was added (base = inclusive / (1 + GST/100)).
How is compound annual growth rate (CAGR) different from simple % change?: Simple % change = (End − Start)/Start × 100. CAGR accounts for compounding: CAGR = (End/Start)^(1/years) − 1. For investments, always use CAGR for multi-year returns. A ₹1L growing to ₹2L in 6 years is not a 100% return — it's a 12.25% CAGR.

Continue with another utility in unit & everyday converters.

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