Free Online Percentage Calculator
Calculate percentage increase, decrease, and what percent one number is of another. Free tools with the formula and a worked example on the page.
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Percentage Calculators
Basic percentage changes, differences, and fractions.
Financial Calculators
Salary, inflation, tax, and investment tools.
Education Calculators
Grades, GPA, and test score percentages.
Health Calculators
BMI, body fat, and weight change metrics.
Regional Calculators
Specific tools for Singapore, China, and more.
Utility Calculators
Roman numerals and everyday conversions.
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Percentage Calculators
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.
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.
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.
Test Score Percentage Calculator
Enter the points you received and the total points available to calculate your final percentage score.
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.
Financial & Money Calculators
Bill Increase Calculator
Determine the percentage increase of utility bills, subscriptions, and recurring expenses so you can budget better.
Compound Interest Calculator
Calculate how your investments grow over time with the power of compounding.
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.
Loan Early Repayment Calculator
Calculate how much interest and time you can save by making extra payments on your loan.
Inflation & Purchasing Power Calculator
Calculate how the value of money changes over time due to inflation.
Investment ROI & CAGR Calculator
Calculate your total return on investment (ROI) and compound annual growth rate (CAGR) for any asset.
Lifestyle Inflation & Subscription Fatigue Calculator
Calculate how lifestyle creep and monthly subscriptions are eroding your real purchasing power and future wealth.
Loan & Mortgage Calculator
Calculate your monthly payments and see how interest impacts your total loan cost over time.
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.
Profit Margin Calculator
Calculate your gross profit margin and markup to determine the best pricing strategy for your products.
Markup Calculator
Calculate the markup percentage based on your cost and desired sales price, or find the ideal price for a target margin.
Pay Raise Calculator
Easily calculate the percentage of your pay raise. Works for hourly rates, weekly paychecks, and annual salaries.
Population Growth Calculator
Determine the percentage growth of any population over a specific period. Ideal for geography, biology, and sociology studies.
Price Increase Calculator
Determine the percentage rise in prices for goods, services, bills, or business markups. Track the real impact of inflation.
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.
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 (2026)
Don't just calculate the percentage. Understand what your pay raise actually means for your purchasing power in 2025.
Sales Growth Calculator
Measure business momentum. Calculate month-over-month or year-over-year sales growth percentages instantly.
VAT & Sales Tax Calculator
Calculate net and gross prices by applying the appropriate value-added tax (VAT) or sales tax rates.
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.
Education Calculators
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
Quickly find your test score percentage and letter grade based on points earned and total possible points.
Weighted Grade Calculator
Calculate your final grade by assigning weights to different categories like homework, midterms, and finals.
Health-Safe Calculators
BMI Calculator
Calculate your Body Mass Index (BMI) instantly to understand your weight-to-height ratio.
Body Fat Percentage Calculator
Enter your body measurements to get an accurate estimate of your body fat percentage and lean body mass.
Calorie & Macro Wizard
Calculate your daily calorie needs and optimal macronutrient breakdown for fat loss, maintenance, or muscle gain.
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.
Weight Loss Percentage Calculator
Enter your starting weight and current weight to calculate your total percentage loss.
Regional Calculators
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.
Utilities & Converters
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