Percentage Calculator

Calculate percentages, tips, discounts, tax, markup, and more in one tool

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What is X% of Y?

Formula: Result = (X / 100) × Y

What is % of ?

X is what % of Y?

Formula: Percentage = (X / Y) × 100

is what % of ?

Percentage Change from X to Y

Formula: Change = ((Y − X) / |X|) × 100

From to

Tip Calculator

Calculate tip amount, total, and per-person split

Bill Amount

Tip %

Split

Discount Calculator

Calculate discount amount and final price

Original Price

Discount %

Tax Calculator

Add or remove tax from an amount

Amount

Tax Rate %

Mode

Markup & Margin Calculator

Markup = (Profit / Cost) × 100 | Margin = (Profit / Price) × 100

Cost

Markup %

Compound Percentage

Apply X% repeatedly N times: Result = Value × (1 + X/100)^N

Initial Value

Percentage %

Times (N)

Fraction ↔ Percentage

Convert between fractions and percentages

/ = %

Edit the fraction to see the percentage, or edit the percentage to see the fraction.

Calculation History

No calculations yet. Start using any mode above.

How to Use Percentage Calculator

Choose calculation type

Select what percentage calculation you need.

Enter values

Input the numbers for your calculation.

View result

See the percentage result instantly.

Why Choose AllTools Percentage Calculator?

✓ 100% free, no account needed
✓ No data stored or transmitted
✓ Multiple calculation modes
✓ Percentage change and difference
✓ Instant results
✓ Tip calculator with split
✓ Discount calculator with presets
✓ Tax calculator (add/remove)
✓ Markup vs margin calculator
✓ Compound percentage
✓ Fraction to percentage converter
✓ Calculation history
✓ Visual percentage bars

Frequently Asked Questions

What can I calculate? ▼

What is X% of Y, X is what % of Y, percentage change, percentage increase/decrease, percentage difference, tips, discounts, tax, markup, margin, compound percentages, and fraction conversions.

Is this calculator accurate? ▼

Yes. It uses standard mathematical formulas for all percentage calculations.

Can I calculate percentage change? ▼

Yes, enter the old and new values to see the percentage increase or decrease.

Is there a limit on calculations? ▼

No. Calculate as many times as you want, completely free.

Is my data stored? ▼

No. All calculations happen in your browser. Nothing is sent to any server.

Does this work on mobile? ▼

Yes, all AllTools tools are mobile-optimized and work on iOS and Android browsers.

How does the tip calculator work? ▼

Enter the bill amount, select a tip percentage (or enter custom), and optionally split between multiple people to see each person's share.

How does the discount calculator work? ▼

Enter the original price and discount percentage to see the final price. Presets for common discounts (10%, 20%, 25%, 50%) are included.

What is the difference between markup and margin? ▼

Markup is the percentage added to cost price, while margin is the percentage of the selling price that is profit. The tool calculates both from either input.

Can I calculate tax? ▼

Yes, enter a price and tax rate to add tax or remove tax from a tax-inclusive price.