Free Online Calculators

Simple, accurate calculators for everyday needs. Math, health, finance and more.

Most Popular

Algebra Calculator

Solve algebraic equations and simplify expressions step by step.

Scientific Calculator

Full-featured scientific calculator with trigonometric, logarithmic and exponential functions.

Graphing Calculator

Plot mathematical functions and equations on an interactive graph.

Percentage Calculator

Calculate percentages, percentage change, and percentage of a number.

Quadratic Formula Calculator

Solve quadratic equations ax² + bx + c = 0 using the quadratic formula.

Calculate your Body Mass Index and find out if you are underweight, normal, overweight or obese.

Calculate your exact age in years, months, days, hours and minutes.

Calorie Calculator

Estimate your daily calorie needs based on age, gender, height, weight and activity level.

TDEE Calculator

Calculate your Total Daily Energy Expenditure to manage your weight effectively.

Mortgage Calculator

Calculate monthly mortgage payments, total interest and amortization schedule.

Loan Calculator

Calculate monthly loan payments and total interest for any loan amount.

Calculate your Equated Monthly Installment for loans easily.

Compound Interest Calculator

Calculate compound interest and see how your investment grows over time.

Currency Converter

Convert between world currencies using up-to-date exchange rates.

Salary Calculator

Convert your salary between hourly, daily, weekly, monthly and annual rates.

Estimate your income tax liability based on your income and filing status.

Calculate maturity amount and interest earned on Recurring Deposits.

Investment Calculator

Calculate future value of your investments with compound growth.

Length Converter

Convert between meters, feet, inches, kilometers, miles and other length units.

Date Calculator

Calculate the difference between two dates or add and subtract days from a date.

Days Calculator

Count the number of days between two dates including or excluding weekends.

Concrete Calculator

Calculate the amount of concrete needed for your construction project.

Calculate your Grade Point Average for semester and cumulative GPA.

🧮 Math

Algebra Calculator

Solve algebraic equations and simplify expressions step by step.

Scientific Calculator

Full-featured scientific calculator with trigonometric, logarithmic and exponential functions.

Graphing Calculator

Plot mathematical functions and equations on an interactive graph.

Percentage Calculator

Calculate percentages, percentage change, and percentage of a number.

Quadratic Formula Calculator

Solve quadratic equations ax² + bx + c = 0 using the quadratic formula.

Fraction Calculator

Add, subtract, multiply and divide fractions with step-by-step solutions.

Standard Deviation Calculator

Calculate mean, variance, and standard deviation for a dataset.

Distance Formula Calculator

Calculate the distance between two points using the distance formula.

Exponent Calculator

Calculate powers and exponents including negative and fractional exponents.

Ratio Calculator

Simplify ratios and solve ratio problems with step-by-step solutions.

Binary / Hex Calculator

Convert between binary, decimal, hexadecimal and octal number systems.

Area Calculator

Calculate the area of common shapes including circles, rectangles, and triangles.

Trigonometry Calculator

Compute sine, cosine, tangent and other trigonometric functions.

Percentile Calculator

Find the percentile rank of a value in a dataset.

LCM & GCF Calculator

Find the Least Common Multiple and Greatest Common Factor of two or more numbers.

Probability Calculator

Calculate probabilities for single and multiple events.

Logarithm Calculator

Compute logarithms with any base, including natural log and log base 10.

Volume Calculator

Calculate the volume of 3D shapes including spheres, cylinders and cones.

Prime Factorization Calculator

Find all prime factors of any integer using prime factorization.

Random Number Generator

Generate random numbers within a custom range instantly.

❤️ Health & Fitness

Calculate your Body Mass Index and find out if you are underweight, normal, overweight or obese.

Calculate your exact age in years, months, days, hours and minutes.

Calorie Calculator

Estimate your daily calorie needs based on age, gender, height, weight and activity level.

TDEE Calculator

Calculate your Total Daily Energy Expenditure to manage your weight effectively.

Ideal Weight Calculator

Find your ideal body weight based on height and body frame size.

Pace Calculator

Calculate your running pace, speed and finish time for any distance.

Body Fat Calculator

Estimate your body fat percentage using measurements and formulas.

Bra Size Calculator

Find your correct bra size based on band and cup measurements.

Protein Calculator

Calculate your daily protein intake based on your weight and fitness goals.

Macro Calculator

Calculate your daily macronutrient needs including protein, fat and carbohydrates.

Weight Loss Calculator

Calculate how long it will take to reach your goal weight with a calorie deficit.

Heart Rate Calculator

Find your target heart rate zones for effective cardio training.

Water Intake Calculator

Calculate how much water you should drink per day based on your weight and activity.

Calories Burned Calculator

Estimate the number of calories burned during different physical activities.

Due Date Calculator

Calculate your pregnancy due date based on your last menstrual period.

Sleep Calculator

Find the best times to wake up or go to sleep based on sleep cycles.

💰 Finance

Mortgage Calculator

Calculate monthly mortgage payments, total interest and amortization schedule.

Loan Calculator

Calculate monthly loan payments and total interest for any loan amount.

Calculate your Equated Monthly Installment for loans easily.

Compound Interest Calculator

Calculate compound interest and see how your investment grows over time.

Currency Converter

Convert between world currencies using up-to-date exchange rates.

Salary Calculator

Convert your salary between hourly, daily, weekly, monthly and annual rates.

Estimate your income tax liability based on your income and filing status.

Calculate maturity amount and interest earned on Recurring Deposits.

Investment Calculator

Calculate future value of your investments with compound growth.

Simple Interest Calculator

Calculate simple interest on a principal amount over a given time period.

Retirement Calculator

Estimate how much you need to save for a comfortable retirement.

Payment Calculator

Calculate monthly payment amounts for loans and financing.

Stamp Duty Calculator

Estimate stamp duty costs when buying a property.

Calculate Goods and Services Tax amounts for purchases and sales.

Calculate the tip amount and split the bill among friends easily.

Savings Calculator

Calculate how your savings will grow with regular contributions.

Amortization Calculator

Generate a full loan amortization schedule with principal and interest breakdown.

Calculate Value Added Tax amounts for any price and VAT rate.

Budget Calculator

Plan and track your monthly budget with income and expense categories.

Profit Margin Calculator

Calculate gross and net profit margins for your business.

HELOC Calculator

Calculate payments for a Home Equity Line of Credit.

Down Payment Calculator

Calculate how much you need for a down payment on a home purchase.

Annuity Calculator

Calculate the future value or present value of an annuity.

Student Loan Calculator

Estimate monthly payments and total cost of your student loans.

VA Loan Calculator

Calculate monthly payments for VA home loans with no PMI.

Refinance Calculator

Compare your current mortgage with a refinance option to find potential savings.

Buy to Let Calculator

Calculate rental yield and returns on a buy-to-let property investment.

Novated Lease Calculator

Calculate the cost savings of a novated lease vehicle arrangement.

Car Depreciation Calculator

Estimate how much your car loses in value over time.

Inflation Calculator

Calculate the impact of inflation on purchasing power over time.

🔄 Unit Converter

Length Converter

Convert between meters, feet, inches, kilometers, miles and other length units.

Convert between hundreds of units across different measurement categories.

Weight Converter

Convert between kilograms, pounds, ounces, grams and other weight units.

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin and other temperature scales.

Area Unit Converter

Convert between square meters, square feet, acres, hectares and more.

Volume Unit Converter

Convert between liters, gallons, fluid ounces, cubic meters and more.

Data Size Converter

Convert between bytes, kilobytes, megabytes, gigabytes and other data units.

Speed Converter

Convert between km/h, mph, m/s, knots and other speed units.

📅 Date & Time

Date Calculator

Calculate the difference between two dates or add and subtract days from a date.

Days Calculator

Count the number of days between two dates including or excluding weekends.

Time Calculator

Add, subtract and convert time values in hours, minutes and seconds.

Week Calculator

Calculate the number of weeks between two dates.

Time Zone Converter

Convert time between different time zones around the world.

Countdown Calculator

Count down the days, hours and minutes until any future date or event.

🏗️ Construction

Concrete Calculator

Calculate the amount of concrete needed for your construction project.

Square Footage Calculator

Calculate the square footage of rooms, floors, and outdoor spaces.

Gravel Calculator

Calculate how much gravel or crushed stone you need for a project.

Paint Calculator

Estimate how much paint you need to cover walls, ceilings and other surfaces.

Asphalt Calculator

Calculate the amount of asphalt needed for driveways and paving projects.

Brick Calculator

Estimate the number of bricks needed for a wall or building project.

Roofing Calculator

Calculate roofing materials needed including shingles, tiles and underlayment.

Flooring Calculator

Calculate how much flooring material you need for any room.

Fence Calculator

Estimate the materials needed to build a fence around your property.

Deck Calculator

Calculate the lumber and materials needed to build a deck.

Pool Calculator

Calculate the volume, surface area and chemical needs for your swimming pool.

🎓 Education

Calculate your Grade Point Average for semester and cumulative GPA.

Grade Calculator

Calculate what grade you need on a final exam to achieve your target grade.

Test Score Calculator

Convert raw test scores to percentages and letter grades.

Reading Level Calculator

Determine the reading level and grade level of any text passage.

🔧 Other

Freight Class Calculator

Determine the freight class for shipping based on density and commodity type.

Electricity Cost Calculator

Calculate how much it costs to run electrical appliances and devices.

Solar Panel Calculator

Estimate solar panel system size and savings for your home or business.

Carbon Footprint Calculator

Calculate your personal carbon footprint and find ways to reduce it.

Wind Chill Calculator

Calculate the perceived temperature considering wind speed and actual temperature.