Percentage Calculator

Three common percentage problems solved instantly — no formulas needed.

Quick answer: Free percentage calculator: what is X% of Y, X is what percent of Y, and percentage increase or decrease. Instant results, mobile friendly.

1) What is X% of Y?

2) X is what percent of Y?

3) Percentage change from old to new

How to use

Open this page on any device — no signup needed.
Fill in the fields above.
Get your result instantly — nothing is uploaded.

About this tool

A percentage calculator solves the three most common percentage problems: finding a percentage of a number, finding what percentage one number is of another, and calculating percentage increase or decrease between two values. Useful for discounts, taxes, grades, tips, finance and data analysis.

FAQ

How do I calculate X% of Y?

Multiply Y by X and divide by 100 — or just use the first mode of this calculator.

How do I calculate percentage change?

Subtract the old value from the new value, divide by the old value and multiply by 100. Mode 3 does it automatically.

Is it free?

Yes — 100% free, no signup, and all math runs in your browser.

Rate this tool

Your rating stays in this browser (local storage) — nothing is sent to any server.

Related tools

🎂

The complete percentage calculator guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Percentage Calculator — Complete Guide, Mistakes & FAQ covers all of it step by step.

Browse the collection: Calculators — All 96 Free Online Tools

Percentage Calculator

How to use

About this tool

FAQ

Rate this tool

Related tools

Age Calculator

EMI / Loan Calculator

BMI Calculator

CGPA / Percentage Converter

Land Area Converter

Date Difference Calculator

Cooking Unit Converter

Unit Price Comparator

Pet Cost Calculator

Fuel Cost Calculator

Grade Calculator

Final Exam Grade Calculator

Business Days Calculator

Number to Words Converter

Online Calculator

Length Converter

Weight Converter

Temperature Converter

Speed Converter

Area Converter

Volume Converter

Pressure Converter

Cooking Measurement Converter

Shoe Size Converter

Random Number Generator

Online Dice Roller

Coin Flip Online

Yes or No Picker

Online Countdown Timer

Online Stopwatch

Lucky Number Calculator

Zodiac Sign Finder (Star Sign)

Biorhythm Calculator

Lucky Color Finder (By Birth Date)

Pet Age Converter (Dog & Cat Years)

Pet Food Calculator (Daily Portions)

GPA Goal Calculator

Currency Converter

Roman Numeral Converter

Pomodoro Timer

Aspect Ratio Calculator

Age Difference Calculator

Bandwidth Calculator

1099 Tax Calculator

Annuity Calculator

ATS Resume Checker

Business Loan Calculator

Company Tax Calculator

Crypto Tax Calculator

CV Maker (Academic Style)

Debt Consolidation Loan Calculator

Employer Cost Calculator

Forex Lot Size Calculator

Forex Trade Simulator

Freelance Invoice Template

Life Insurance Needs Calculator

Australia Mortgage Calculator

Canada Mortgage Calculator

Florida Mortgage Calculator

Hawaii Mortgage Calculator

Maryland Mortgage Calculator

Texas Mortgage Calculator

UK Mortgage Calculator

Washington Mortgage Calculator

Online Will Maker

Overtime Calculator

Payroll Calculator

Georgia Employer Payroll Tax Calculator

New York Employer Payroll Tax Calculator

North Carolina Employer Payroll Tax Calculator

Texas Employer Payroll Tax Calculator

Quarterly Tax Calculator

Refinance Calculator

Resume Score Checker