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Percentage Calculators
Calculate percentages, increases, decreases, changes, discounts and more with our free percentage tools.
Finance Calculators
Plan your financial future with ROI, compound interest, loan, mortgage, investment and retirement calculators.
Business Calculators
Make smarter business decisions with profit margin, markup, break-even, commission and revenue tools.
Salary & Payroll Calculators
Calculate salary, hourly wages, overtime, raises, bonuses and cost of living adjustments.
Health & Fitness Calculators
Monitor your health with BMI, body fat, calorie, water intake, heart rate and weight loss calculators.
Real Estate Calculators
Calculate mortgage affordability, rental yield, property ROI, down payments and closing costs.
Education Calculators
Track academic performance with grade, GPA, test score, attendance and weighted grade calculators.
Math Calculators
Solve fractions, ratios, averages, probability, exponents and equations with our free math tools.
Time & Date Calculators
Calculate age, date differences, durations, countdowns, work hours and business days.
Utility & Lifestyle Calculators
Convert units, calculate fuel costs, electricity bills, data usage, tips and budgets.
Tax Calculators
Calculate VAT, sales tax and other tax obligations quickly and accurately.
Marketing Calculators
Measure campaign performance with conversion rate, CTR, CPC, CPM and ROAS calculators.
Unit Conversion Calculators
Convert length, weight, temperature and currency between units instantly.
Featured Calculators
Our most popular and useful tools
Percentage Calculator
Calculate what is X% of Y, what percent X is of Y, and more percentage values.
Percentage Increase Calculator
Calculate the percentage increase from one value to another.
ROI Calculator
Calculate Return on Investment (ROI) to measure the profitability of your investments.
Compound Interest Calculator
Calculate compound interest on your savings and investments over time.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and total cost.
Profit Margin Calculator
Calculate your profit margin to understand how much profit you make on each sale.
Salary Calculator
Convert between annual, monthly, weekly, and hourly salary figures instantly.
VAT Calculator
Add or remove VAT from any amount to calculate the net or gross price.
Conversion Rate Calculator
Calculate your conversion rate to measure how well your website or campaign performs.
Grade Calculator
Calculate your weighted grade average from multiple assignments, tests, and categories.
BMI Calculator
Calculate your Body Mass Index (BMI) to check if your weight is in a healthy range.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest.
Rental Yield Calculator
Calculate the gross rental yield of a property to evaluate its income potential as an investment.
Scientific Calculator
Evaluate mathematical expressions with order of operations, powers, and functions.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Unit Converter
Convert between common units of length, weight, and temperature in one convenient tool.
Budget Calculator
Break down your monthly income using the 50/30/20 budgeting rule for needs, wants, and savings.
Length Converter
Convert between meters, feet, inches, kilometers, miles, centimeters, and more.
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Percentage Calculator
Calculate what is X% of Y, what percent X is of Y, and more percentage values.
Percentage Change Calculator
Calculate the percentage change between two values, positive or negative.
ROI Calculator
Calculate Return on Investment (ROI) to measure the profitability of your investments.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and total cost.
Profit Margin Calculator
Calculate your profit margin to understand how much profit you make on each sale.
VAT Calculator
Add or remove VAT from any amount to calculate the net or gross price.
BMI Calculator
Calculate your Body Mass Index (BMI) to check if your weight is in a healthy range.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Tip Calculator
Calculate the tip amount and total bill based on your bill, tip percentage, and number of people.
All Calculators
(111)Percentage Calculators
View allPercentage Calculator
Calculate what is X% of Y, what percent X is of Y, and more percentage values.
Percentage Increase Calculator
Calculate the percentage increase from one value to another.
Percentage Decrease Calculator
Calculate the percentage decrease from one value to another.
Reverse Percentage Calculator
Find the original value before a percentage was applied.
Percentage Change Calculator
Calculate the percentage change between two values, positive or negative.
Fraction to Percentage Calculator
Convert any fraction to its percentage equivalent with step-by-step explanation.
Percentage Difference Calculator
Calculate the percentage difference between two values using their average as the base, with no directional bias.
Grade Percentage Calculator
Convert a test score to a percentage by dividing the score earned by the total possible points.
Discount Percentage Calculator
Calculate the discount percentage and your savings from the original price and sale price of an item.
Percent Error Calculator
Calculate the percent error between an observed (experimental) value and a theoretical (accepted) value.
Markup Percentage Calculator
Calculate the markup percentage from the cost of a product to its selling price.
Finance Calculators
View allROI Calculator
Calculate Return on Investment (ROI) to measure the profitability of your investments.
Compound Interest Calculator
Calculate compound interest on your savings and investments over time.
Loan Calculator
Calculate monthly loan payments, total interest, and total cost.
Savings Calculator
Calculate how much your savings will grow with regular deposits and compound interest.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and total cost.
Investment Return Calculator
Calculate the annualized return on your investment over a specific period.
Simple Interest Calculator
Calculate simple interest on a principal amount over time at a fixed annual rate.
Credit Card Payoff Calculator
Calculate how long it will take to pay off your credit card balance and the total interest you will pay.
Retirement Calculator
Estimate how much your retirement savings will grow with current savings and regular monthly contributions.
Inflation Calculator
Calculate how much a present-day amount will be worth in the future after inflation erodes its purchasing power.
Investment Calculator
Calculate how your investment grows over time with an initial amount and regular monthly contributions.
Business Calculators
View allProfit Margin Calculator
Calculate your profit margin to understand how much profit you make on each sale.
Markup Calculator
Calculate the markup percentage on your products to set the right selling price.
Break-Even Calculator
Calculate the break-even point where your total revenue equals total costs.
Revenue Growth Calculator
Calculate your revenue growth rate to track business performance over time.
Profit Calculator
Calculate your net profit from total revenue and costs to see how much money your business keeps.
Gross Margin Calculator
Calculate your gross margin and gross profit from revenue and cost of goods sold.
Commission Calculator
Calculate sales commission from the sales amount and commission rate.
Cost Plus Pricing Calculator
Calculate a selling price using cost-plus pricing by adding a markup percentage to your cost.
Salary & Payroll Calculators
View allSalary Calculator
Convert between annual, monthly, weekly, and hourly salary figures instantly.
Salary Increase Calculator
Calculate the percentage and dollar amount of a salary increase between two figures.
Hourly Wage Calculator
Convert an annual salary into an hourly wage, weekly pay, and monthly pay.
Overtime Calculator
Calculate overtime pay based on hourly rate, regular hours, and overtime hours.
Net Salary Calculator
Calculate your net (take-home) salary after deducting income tax.
Freelance Rate Calculator
Calculate the hourly rate you need to charge to hit a target annual income as a freelancer.
Pay Raise Calculator
Calculate your new salary and raise amount from a percentage increase.
Annual Income Calculator
Calculate your annual income from an hourly wage, hours per week, and weeks per year.
Bonus Calculator
Calculate your bonus amount and total compensation from your salary and bonus percentage.
Cost of Living Calculator
Compare the cost of living between two cities and find the salary needed to maintain your lifestyle.
Health & Fitness Calculators
View allBMI Calculator
Calculate your Body Mass Index (BMI) to check if your weight is in a healthy range.
Calorie Calculator
Calculate your daily calorie needs based on age, weight, height, and activity level.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Water Intake Calculator
Calculate your recommended daily water intake based on body weight and exercise.
Protein Intake Calculator
Calculate your daily protein needs based on body weight and activity level.
Pregnancy Due Date Calculator
Estimate your pregnancy due date and current week of gestation from your last menstrual period.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest.
Heart Rate Calculator
Calculate your maximum heart rate and target heart rate zones for exercise.
Weight Loss Calculator
Calculate how long it will take to reach your target weight based on a daily calorie deficit.
Ideal Weight Calculator
Estimate your ideal body weight using the Devine formula based on height and gender.
Real Estate Calculators
View allRental Yield Calculator
Calculate the gross rental yield of a property to evaluate its income potential as an investment.
Property ROI Calculator
Calculate the return on investment (ROI) for a rental property based on purchase price, rent, and expenses.
Mortgage Affordability Calculator
Calculate how much house you can afford based on your income, down payment, interest rate, and loan term.
Home Loan Calculator
Calculate your monthly home loan payment, total interest, and total cost over the life of the loan.
House Payment Calculator
Calculate your total monthly house payment including estimated principal, interest, taxes, and insurance.
Down Payment Calculator
Calculate your required down payment, resulting loan amount, and loan-to-value ratio for any home price.
Property Tax Calculator
Calculate your annual and monthly property tax based on the assessed value and local tax rate.
Rental Cashflow Calculator
Calculate your net monthly and annual rental cashflow after mortgage and expenses.
Refinancing Calculator
Compare your current mortgage with a new refinanced loan to see your monthly savings and break-even.
Closing Cost Calculator
Estimate your closing costs based on the home price and a closing cost percentage rate.
Education Calculators
View allGrade Calculator
Calculate your weighted grade average from multiple assignments, tests, and categories.
GPA Calculator
Calculate your Grade Point Average (GPA) from your course grades and credit hours.
Test Score Calculator
Calculate the percentage score on a test by dividing points earned by total possible points.
Exam Average Calculator
Calculate the average of multiple exam scores, plus the highest and lowest scores in the set.
Attendance Calculator
Calculate your attendance percentage and number of classes missed from classes attended and total classes.
Marks Percentage Calculator
Calculate the percentage from marks obtained and total marks, commonly used in Indian and British grading systems.
Final Grade Calculator
Calculate the grade you need on your final exam to reach your target overall course grade.
Study Time Calculator
Calculate the weekly and daily study hours needed based on course credits and difficulty level.
Weighted Grade Calculator
Calculate a weighted grade from multiple categories like homework, quizzes, and exams with different weights.
Semester GPA Calculator
Calculate your GPA for a single semester from up to four courses with letter grades and credit hours.
Math Calculators
View allFraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step simplification.
Ratio Calculator
Simplify ratios and solve for the unknown term in a proportion A:B = C:D.
Decimal Calculator
Convert between decimal, fraction, and percentage forms of a number.
Scientific Calculator
Evaluate mathematical expressions with order of operations, powers, and functions.
Average Calculator
Calculate the average (arithmetic mean) of multiple numbers instantly.
Mean Calculator
Calculate the arithmetic mean of a data set with detailed steps.
Median Calculator
Find the median (middle value) of a list of numbers, with sorting shown.
Probability Calculator
Calculate the probability of an event and its odds from favorable and total outcomes.
Exponent Calculator
Calculate powers and exponents: base raised to any exponent, including negatives.
Equation Solver
Solve simple linear equations of the form ax + b = c for the unknown x.
Time & Date Calculators
View allAge Calculator
Calculate your exact age in years, months, and days from your date of birth.
Date Difference Calculator
Calculate the number of days and weeks between two calendar dates.
Time Duration Calculator
Calculate the duration between two times of day in hours and minutes.
Countdown Calculator
Calculate the number of days and weeks remaining until a future target date.
Work Hours Calculator
Calculate total work hours and paid hours from start and end times, subtracting a break.
Retirement Age Calculator
Calculate how many years remain until you reach your target retirement age and the projected retirement date.
Time Zone Converter
Convert a time from one UTC offset to another to coordinate across global time zones.
Business Days Calculator
Calculate the number of business days (weekdays) between two dates, excluding weekends.
Hours Between Dates Calculator
Calculate the total number of hours and minutes between two calendar dates.
Due Date Calculator
Calculate a deadline or due date by adding a number of days to a start date.
Utility & Lifestyle Calculators
View allUnit Converter
Convert between common units of length, weight, and temperature in one convenient tool.
Fuel Cost Calculator
Calculate the fuel needed and total cost for a trip based on distance, fuel efficiency, and gas price.
Electricity Cost Calculator
Calculate the electricity cost of running any device based on wattage, usage hours, and your rate.
Solar Savings Calculator
Estimate annual and 10-year savings from a solar panel system based on size, sun hours, and electricity rate.
Battery Sizing Calculator
Calculate the battery capacity (in amp-hours) needed to power a load for a given time at a specific voltage.
Internet Speed Calculator
Calculate how long it takes to download a file at a given internet speed.
Data Usage Calculator
Calculate your monthly data usage based on daily consumption and the number of days in your billing cycle.
Tip Calculator
Calculate the tip amount and total bill based on your bill, tip percentage, and number of people.
Budget Calculator
Break down your monthly income using the 50/30/20 budgeting rule for needs, wants, and savings.
Tip Split Calculator
Split a bill among friends with tip included. Enter the bill, tip percentage, and group size to see what each person owes.
Tax Calculators
View allMarketing Calculators
View allConversion Rate Calculator
Calculate your conversion rate to measure how well your website or campaign performs.
CTR Calculator
Calculate Click-Through Rate (CTR) to measure ad and link performance.
CPC Calculator
Calculate Cost Per Click (CPC) to measure your advertising efficiency.
CPM Calculator
Calculate Cost Per Mille (CPM) to measure the cost per 1,000 impressions.
ROAS Calculator
Calculate Return on Ad Spend (ROAS) to measure advertising profitability.
Unit Conversion Calculators
View allLength Converter
Convert between meters, feet, inches, kilometers, miles, centimeters, and more.
Weight Converter
Convert between kilograms, pounds, grams, ounces, stones, and tons.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Currency Converter
Convert between currencies using your own exchange rates for instant calculations.
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No sign-up, no fees, no limits. Use every calculator as much as you want.
Accurate & Trusted
Every formula is verified and explained so you understand the math.
Always Growing
New calculators added regularly. From 30 today to 500+ tomorrow.