Free Percentage Calculator Online
Calculate percentages, discover growth rates, or figure out discounts in seconds. Organized, fast, and completely free.
Percentage Basics
Decimal to Percentage Calculator
Enter a decimal value to instantly convert it to its percentage equivalent, with step-by-step limits.
Percent Error Calculator
Compare your observed (approximate) value with the true (exact) value to find the margin of error.
Fraction to Percentage Calculator
Easily convert any fraction into a percentage. Enter the numerator (top number) and denominator (bottom number) to see the equivalent percentage.
Percentage Change Calculator
Enter the original and new values to see the percentage change. Works for prices, traffic, revenue, grades, and more.
Percentage Decrease Calculator
See how much a value has dropped as a percentage. Perfect for calculating discounts, losses, performance declines, and before-and-after comparisons.
Percentage Difference Calculator
Find how much two values differ in percentage terms. Ideal for comparing results, prices, or performance metrics.
Percentage Increase Calculator
Measure how much a value has grown as a percentage. Ideal for investment returns, salary raises, business performance, and before-and-after comparisons.
Percentage of a Number Calculator
Find what percentage of a number equals in seconds. Perfect for discounts, tips, taxes, commissions, profit margins, and everyday financial calculations. Get step-by-step explanations and real-world examples.
Percentage Points Calculator
Calculate the change in percentage points between two percentages with step-by-step breakdown. Perfect for analyzing survey results, statistics, financial rates, and polling data.
Roman Numeral Calculator
Free Roman numeral calculator to convert any number or date to Roman numerals and vice versa. Perfect for dates, chapters, outlines, and numbering systems.
Weight Loss Percentage Calculator
Enter your starting weight and current weight to calculate your total percentage loss.
What Percent is A of B Calculator
Calculate what percentage one number is of another with step-by-step guidance. Ideal for calculating test scores, sales completion rates, budget tracking, project progress, and more.
Winning Percentage Calculator
Enter the number of wins, losses, and ties (draws) to determine the winning percentage.
Money & Salary
Bill Increase Calculator
Determine the percentage increase of utility bills, subscriptions, and recurring expenses so you can budget better.
Compound Interest Calculator
Project your investment growth over time with customizable interest rates, contribution frequencies, and compounding intervals.
Discount Calculator
Quickly find the final price and total savings on any percentage discount. Perfect for sales, coupons, and seasonal promos.
Down Payment Percentage Calculator
Enter the total purchase price and the amount you plan to put down to see if you meet lender requirements.
Inflation Rate Calculator
Calculate the inflation rate between two years or two prices. See how much purchasing power has been lost due to price increases.
Interest Rate Percentage Calculator
Reverse calculate the interest rate when you know the principal, total interest paid, and time period.
Investment Return Calculator
Measure your investing success. Calculate the percentage return on stocks, crypto, real estate, or business investments.
Loan to Value (LTV) Calculator
Enter the loan amount and property value to see your LTV ratio. Lower LTVs usually qualify for better interest rates.
Pay Raise Calculator
Easily calculate the percentage of your pay raise. Works for hourly rates, weekly paychecks, and annual salaries.
Price Increase Calculator
Determine the percentage rise in prices for goods, services, bills, or business markups. Track the real impact of inflation.
Rent Increase Calculator
Quickly calculate the percentage increase of a rent hike. Essential for verifying legal rent caps and lease renewal negotiations.
Salary Increase Calculator (2025)
Don't just calculate the percentage. Understand what your pay raise actually means for your purchasing power in 2025.
Tax Increase Calculator
Determine the exact percentage increase of any tax bill or tax rate. Essential for homeowners and business owners.
Sales Tax Calculator
Find the sales tax amount and total price instantly. Enter the original price and tax rate to see an itemized breakdown with step-by-step calculations.
Ticket Price Calculator
Determine the percentage increase of any ticket price. Perfect for checking airline fare hikes, concert markups, and hidden fees impact.
Tip Calculator with Tax
Calculate restaurant tips with tax included. Perfect for dining out, delivery services, and quick bill verification. Get clear breakdowns instantly.
Tuition Increase Calculator
Determine the exact percentage increase of your tuition fees. Essential for student budgeting and financial aid planning.
VAT Calculator
Calculate the VAT amount, net price, and gross price. Enter the rate and amount to either add tax or reverse calculation to exclude tax.
Business & Marketing
Profit Margin Calculator
Determine the profitability of a product or service. Enter your cost and selling price (revenue) to find the profit margin.
Markup Calculator
Determine the markup percentage based on your cost and selling price, or use it to find the right selling price for your costs.
Population Growth Calculator
Determine the percentage growth of any population over a specific period. Ideal for geography, biology, and sociology studies.
Profit Growth Calculator
Analyze your bottom line. Determine the percentage growth of your net profit, gross margin, or operating income over time.
Property Value Increase Calculator
Track the growth of your most valuable asset. Determine the percentage increase in your property's market value over time.
Sales Growth Calculator
Measure business momentum. Calculate month-over-month or year-over-year sales growth percentages instantly.
Grades & Education
Final Grade Calculator
Find out exactly what score you need on your final exam to achieve your target grade for the course.
GPA to Percentage Calculator
Enter your current GPA and the scale used by your institution (typically 4.0) to see your equivalent percentage.
Grade Percentage Calculator
Easily determine your grade percentage from any test, quiz, or assignment score. Just enter the points earned and the total points possible.
Test Score Percentage Calculator
Enter the points you received and the total points available to calculate your final percentage score.
Weighted Grade Calculator
Enter your grades and their corresponding percentage weights to find your current overall course score.
Life & Health
BMI Calculator
Calculate your BMI instantly based on your age, gender, weight, and height. Learn how BMI relates to body fat percentage, get personalized health classification, and understand body composition based on WHO and CDC standards.
Body Fat Percentage Calculator
Enter your body measurements to get an accurate estimate of your body fat percentage and lean body mass.
Calorie Deficit Percentage Calculator
Enter your maintenance calories (TDEE) and your target daily intake to see how aggressive your diet is.
Weight Gain Percentage Calculator
Monitor your weight gain progress. Ideal for bulking phases, recovery, or pregnancy milestones.
Calculators by Region
China Investment Return Calculator
Evaluate the performance of your investments in China. Calculate the percentage return on stocks, wealth management products (WMPs), or property.
China Price Increase Calculator
Monitor inflation and cost changes in China. Determine the percentage difference between old and new prices in RMB.
China Salary Increase Calculator
Determine the exact percentage of your salary growth in Chinese Yuan (CNY/RMB). Perfect for annual bonuses, 13-salary calculations, and job switching.
Singapore GST Calculator
Quickly calculate the 9% Goods and Services Tax (GST) in Singapore. Find the tax amount to add, or reverse calculate to find the pre-tax price.
Singapore Rent Increase Calculator
Determine the exact percentage increase of your rental renewal. Essential for negotiations in Singapore's competitive property market.
Singapore Salary Increase Calculator
Determine the exact percentage of your salary increment in Singapore Dollars (SGD). Useful for annual reviews, AWS calculations, and job offer comparisons.
Precision Percentage Tools
Don't guess. Select the exact mathematical model for your specific question to ensure 100% accuracy.
Browse the Answer HubInstant Results
Client-side math. No server latency.
Verified Formulas
Banker's rounding for financial accuracy.
Privacy First
Data never leaves your browser.
Optimized
Tailored for tax, salary, and retail.
Growth & Hikes
Calculate raises, rent increases, or annual inflation rates.
Sales & Discounts
Find the sale price or calculate value after markdown.
Comparisons
Compare two numbers or find complex proportional ratios.
Quick Answers
View all answersWhat is the formula for percentage increase?
Subtract original from new, divide by original, multiply by 100.
Difference between Percent and Percentage Point?
Percent is a relative ratio; Percentage Point is the absolute arithmetic difference.
How to calculate 20% off a price?
Multiply the price by 0.80 to get the final cost directly.