Free Online Calculators

🏦 Loan Calculator Calculate monthly loan payments, total interest and payoff for any loan amount and term. ⚖️ BMI Calculator Calculate your Body Mass Index and see your weight category. ％ Percentage Calculator Find what percent a number is of another, or a percentage of a value. 📈 Compound Interest Calculator See how your savings grow with compound interest over time. 🎂 Age Calculator Calculate your exact age in years, months and days. 🍎 Calorie Calculator Estimate daily calories needed to maintain, lose or gain weight. 🧾 VAT / Sales Tax Calculator Add or remove VAT / sales tax from any amount. 📏 Length Converter Convert between meters, kilometers, miles, feet and inches.

🏦 Loan Calculator Calculate monthly loan payments, total interest and payoff for any loan amount and term. 🏠 Mortgage Calculator Estimate your monthly mortgage payment including principal, interest and down payment. 📈 Compound Interest Calculator See how your savings grow with compound interest over time. 💵 Simple Interest Calculator Calculate simple interest on a principal over a period of time. ％ Percentage Calculator Find what percent a number is of another, or a percentage of a value. 🏷️ Discount Calculator Find the final price and how much you save after a discount. 🧾 VAT / Sales Tax Calculator Add or remove VAT / sales tax from any amount. 🍽️ Tip Calculator Calculate tip and split the bill between people. 🎯 Savings Goal Calculator Find how much to save each month to reach a goal. 💼 Salary Calculator Convert between hourly, monthly and annual pay. ⚖️ BMI Calculator Calculate your Body Mass Index and see your weight category. 🔥 BMR Calculator Estimate your Basal Metabolic Rate — calories burned at rest. 🍎 Calorie Calculator Estimate daily calories needed to maintain, lose or gain weight. 📊 Body Fat Calculator Estimate your body fat percentage using the U.S. Navy method. 🎯 Ideal Weight Calculator Find a healthy weight range for your height. 💧 Water Intake Calculator Estimate how much water you should drink daily. 🤰 Pregnancy Due Date Calculator Estimate your due date from your last menstrual period. 🔢 Matrix Calculator Add, subtract, multiply, transpose, and find the determinant or inverse of a matrix. 🔬 Scientific Calculator A full scientific calculator with trigonometry, logarithms, powers, roots, factorial and memory. 🔢 Big Number Calculator Add, subtract, multiply, divide and power huge whole numbers with unlimited precision. ➗ Long Division Calculator with Steps Divide two numbers and see every long-division step, with the quotient and remainder. 🔀 Percentage Change Calculator Calculate the percentage increase or decrease between two numbers. 📎 Average Calculator Find the mean, sum and count of a list of numbers. ➗ Ratio Calculator Simplify ratios and solve for a missing value. 🔷 Area Calculator Calculate the area of a rectangle, circle or triangle. 🕐 Time Zone Converter Convert a date and time between world time zones, with the exact time difference. 🌐 IP Subnet Calculator Calculate the network, broadcast, mask, host range and host count for any IPv4 address and CIDR. 🔐 Base64 & URL Encoder / Decoder Encode or decode text with Base64 and URL encoding, right in your browser. 🎂 Age Calculator Calculate your exact age in years, months and days. 📅 Date Difference Calculator Count the days, weeks and months between two dates. 📏 Length Converter Convert between meters, kilometers, miles, feet and inches. 🌡️ Temperature Converter Convert between Celsius, Fahrenheit and Kelvin. 🚗 Auto Loan Calculator Calculate car loan monthly payments including down payment, trade-in and sales tax. 📊 Investment Calculator Project the future value of an investment with regular monthly contributions. 📉 Inflation Calculator See how inflation affects the value and buying power of money over time. 👴 Retirement / 401K Calculator Estimate your retirement savings from contributions, employer match and growth. 💹 ROI Calculator Calculate return on investment as a percentage and net profit. ⏮️ Present Value Calculator Find the present value of a future sum of money. ⏭️ Future Value Calculator Find the future value of a present sum growing at a fixed rate. 💳 Credit Card Payoff Calculator Find how long it takes to pay off a credit card and the total interest. ⚡ TDEE Calculator Calculate your Total Daily Energy Expenditure — calories burned per day. 🥗 Macro Calculator Split your daily calories into carbs, protein and fat grams. 💪 Lean Body Mass Calculator Estimate your lean body mass and fat mass. 🏋️ One Rep Max Calculator Estimate the maximum weight you can lift for one repetition. 🏃 Pace Calculator Calculate your running pace and speed from distance and time. ½ Fraction Calculator Add, subtract, multiply or divide two fractions. 📐 Triangle Calculator Find a triangle's area from base and height, or from three sides. 🧊 Volume Calculator Calculate the volume of a box, sphere, cylinder or cone. σ Standard Deviation Calculator Calculate mean, variance and standard deviation of a data set. ⭕ Circle Calculator Calculate area, circumference and diameter from the radius. 🚀 Speed Calculator Calculate average speed from distance and time. 🔠 Roman Numeral Converter Convert numbers to Roman numerals (1–3999). 📋 Amortization Calculator See how a loan payment splits between principal and interest. 🔑 Down Payment Calculator Calculate your down payment and the remaining loan amount. 🧮 Budget Calculator Split your monthly income using the 50/30/20 rule. ⛓️ Debt Payoff Calculator Find how long to clear a debt and the total interest paid. 📐 Margin Calculator Calculate profit margin and markup from cost and price. 🤝 Commission Calculator Calculate sales commission from an amount and rate. 🏡 House Affordability Calculator Estimate the home price you can afford from your income. 🍗 Protein Calculator Estimate your daily protein needs based on activity. 🔥 Calories Burned Calculator Estimate calories burned during exercise. 🌸 Ovulation Calculator Estimate your ovulation day and fertile window. 📆 Period Calculator Predict the date of your next few periods. 💓 Target Heart Rate Calculator Find your training heart-rate zones. 🔢 Exponent Calculator Raise a number to any power. √ Root Calculator Find the square root or any nth root of a number. 🔗 GCF & LCM Calculator Find the greatest common factor and least common multiple. ⚠️ Percent Error Calculator Calculate the percent error between measured and true values. 📊 Mean, Median, Mode Calculator Find the mean, median, mode and range of a data set. 📐 Pythagorean Theorem Calculator Find the hypotenuse of a right triangle from its two legs. 📍 Distance Calculator (2 points) Find the distance between two points on a plane. 📐 Height Converter Convert height between centimeters and feet/inches. ⛽ Fuel Cost Calculator Estimate the fuel cost of a trip. 🧪 Density Calculator Calculate density, mass or volume. 🚙 Gas Mileage Calculator Calculate your vehicle's fuel economy. ➕ Day Counter Calculator Add or subtract days from a date. 🧾 Take-Home Paycheck Calculator Calculate your net pay after tax and deductions. 🏘️ Rent Affordability Calculator Find how much rent you can comfortably afford. 🏦 CD Calculator Calculate the maturity value of a certificate of deposit. 📉 Depreciation Calculator Calculate straight-line depreciation of an asset. 🛒 Sales Tax Calculator Add sales tax to a price and see the total. 💱 Currency Converter Convert an amount using a custom exchange rate. 🍞 Carbohydrate Calculator Find your daily carbohydrate target from your calories. 🥑 Fat Intake Calculator Find your daily fat target from your calories. 🧍 Body Surface Area Calculator Estimate your body surface area (BSA). 🍷 BAC Calculator Estimate blood alcohol concentration (educational). 🧮 Logarithm Calculator Calculate the logarithm of a number in any base. 📈 Slope Calculator Find the slope and equation of a line through two points. 🔟 Rounding Calculator Round a number to a chosen number of decimal places. 🔣 Prime Factorization Calculator Break a number down into its prime factors. ❗ Factorial Calculator Calculate the factorial (n!) of a number. ➗ Quadratic Formula Calculator Solve a quadratic equation ax² + bx + c = 0. ⚖️ Weight Converter Convert between kilograms, grams, pounds and ounces. 🏗️ Square Footage Calculator Calculate the area of a room in square feet and meters. ❄️ BTU Calculator (AC) Estimate the cooling BTU needed for a room. 🎓 GPA Calculator Calculate your grade point average from grades and credits. ⏱️ Hours Calculator Calculate hours worked between a start and end time. 🏁 Mortgage Payoff Calculator See how long until your mortgage is paid off and the interest you'll pay. 🔄 Refinance Calculator Compare your current loan with a refinance and find the break-even point. ⏳ Payback Period Calculator Find how long an investment takes to pay back its cost. 📊 Interest Rate Calculator Work out the interest rate on a loan from its payment and term. 📏 Waist-to-Hip Ratio Calculator Calculate your waist-to-hip ratio and health risk category. 🤰 Pregnancy Weight Gain Calculator Find the recommended weight gain range during pregnancy. 🔀 Permutation & Combination Calculator Calculate permutations (nPr) and combinations (nCr). 📈 Z-Score Calculator Calculate the z-score of a value in a normal distribution. 🎲 Probability Calculator Calculate the probability of an event as a percentage and odds. 🔬 Scientific Notation Converter Convert a number to and from scientific notation. 🔢 Number Sequence Calculator Find the nth term and sum of an arithmetic sequence. 😴 Sleep Calculator Find the best bedtimes for your wake-up time using sleep cycles. ❤️ Love Calculator A fun compatibility score between two names. 🥶 Wind Chill Calculator Calculate how cold it feels with wind (wind chill). 🥵 Heat Index Calculator Calculate how hot it feels with humidity (heat index). 💸 Annuity Payout Calculator Find the regular payout from a lump sum over a set period. 🏦 Annuity Calculator Find the future value of regular contributions to an annuity. 🚗 Lease Calculator Estimate the monthly payment on a car or equipment lease. 📊 APR Calculator Find the true APR of a loan including fees. ⚖️ Debt-to-Income Ratio Calculator Calculate your DTI ratio used by lenders. 🌱 Conception Calculator Estimate your conception date from your last period. 🩺 GFR Calculator Estimate kidney function (eGFR) using the CKD-EPI 2021 equation. 🧍 Body Frame Size Calculator Find your body frame size from height and wrist size. 🔢 Factor Calculator List all the factors (divisors) of a number. 📊 Confidence Interval Calculator Calculate the confidence interval for a sample mean. 👥 Sample Size Calculator Find the sample size needed for a survey. 🧊 Surface Area Calculator Calculate the surface area of a box, sphere or cylinder. 📐 Right Triangle Calculator Solve a right triangle from its two legs. ⏰ Time Calculator Add or subtract hours, minutes and seconds. 🐎 Horsepower Calculator Calculate horsepower from torque and RPM. 🧱 Concrete Calculator Calculate the concrete volume needed for a slab. 🔲 Tile Calculator Find how many tiles you need for a floor or wall. 💵 Personal Loan Calculator Calculate monthly payments and interest on a personal loan. 🎓 Student Loan Calculator Estimate monthly payments and total cost of a student loan. 🏫 College Cost Calculator Project the future cost of a college education with inflation. 🏦 Roth IRA Calculator Project the growth of retirement account contributions. 🏠 Rental Property Calculator Calculate cap rate and cash flow for a rental property. ⚖️ Healthy Weight Calculator Find the healthy weight range for your height. 📏 Waist-to-Height Ratio Calculator Calculate your waist-to-height ratio, a key health indicator. 📊 Statistics Calculator Get full statistics for a data set: mean, median, SD and more. ☢️ Half-Life Calculator Calculate how much of a substance remains after decay. ⚖️ Proportion Calculator Solve a proportion a/b = c/x for the unknown value. ⚡ Ohm's Law Calculator Solve for voltage, current, resistance or power. 💡 Electricity Cost Calculator Estimate the running cost of an electrical appliance. 💧 Dew Point Calculator Calculate the dew point from temperature and humidity. 🪜 Stair Calculator Calculate the number of steps and rise for a staircase. 🪨 Gravel Calculator Calculate the volume and weight of gravel needed. 🏢 Business Loan Calculator Calculate monthly payments and interest on a business loan. 📜 Bond Calculator Calculate the price of a bond from its coupon and market rate. 📈 Average Return Calculator Calculate the average and compound annual return from yearly returns. 📊 Mutual Fund Fee Calculator See how expense ratios reduce your investment over time. 🔢 Geometric Sequence Calculator Find the nth term and sum of a geometric sequence. 📉 P-value Calculator Find the p-value from a z-score. 🔟 Number Base Converter Convert numbers between binary, octal, decimal and hex. 🎰 Random Number Generator Generate random numbers within a range. 🎲 Dice Roller Roll any number of dice with any number of sides. 🔐 Password Generator Generate a strong random password. 📅 Day of the Week Calculator Find the day of the week for any date. 🌱 Mulch Calculator Calculate how much mulch you need for a garden bed. 🏠 Roofing Calculator Estimate roof area from the building footprint and pitch. 📝 Grade Calculator Find the final exam score you need for a target grade. 🧪 Molarity Calculator Calculate the molar concentration of a solution. ⛵ Boat Loan Calculator Calculate monthly payments on a boat loan. 👵 Pension Calculator Estimate your annual pension from salary and years of service. 🏡 Home Equity Loan Calculator Find how much you can borrow against your home equity. 💵 Cash Back vs Low Interest Calculator Compare a cash-back offer with a low-interest financing offer. 📐 Trigonometry Calculator Find sine, cosine and tangent of an angle. ➗ Modulo Calculator Find the remainder when one number is divided by another. ⏳ Time Duration Calculator Find the duration between two dates and times. 🚗 Mileage Reimbursement Calculator Calculate travel reimbursement from distance and rate. 🎨 Paint Calculator Find how much paint you need for a room. 🔲 Flooring Cost Calculator Estimate the cost to floor a room. 🏷️ Unit Price Calculator Find the price per unit to compare products. 🛞 Tire Size Calculator Calculate the overall diameter of a tire from its size. 🧱 Wallpaper Calculator Find how many rolls of wallpaper you need. 🖼️ Aspect Ratio Calculator Simplify a width-to-height ratio for screens and images. 🏠 FHA Loan Calculator Estimate the monthly payment on an FHA home loan including mortgage insurance. 📈 IRR Calculator Calculate the internal rate of return of an investment. 💰 Net Worth Calculator Calculate your net worth from assets and liabilities. ⚖️ Break-Even Calculator Find how many units you must sell to cover your costs. 🧍 Ponderal Index Calculator Calculate the ponderal index, an alternative to BMI. ➗ Long Division Calculator Divide two numbers and get the quotient and remainder. 🔢 Significant Figures Calculator Round a number to a chosen number of significant figures. ½ Decimal to Fraction Calculator Convert a decimal number into a simplified fraction. ⚖️ Weighted Average Calculator Calculate the weighted average of values with weights. ⚡ Voltage Drop Calculator Estimate the voltage drop along a cable run. 👟 Steps to Distance Calculator Convert step count into distance and calories. 🥄 Cooking Volume Converter Convert between cups, milliliters, tablespoons and teaspoons. 🚀 Speed Converter Convert between km/h, mph, m/s and knots. 💾 Data Storage Converter Convert between bytes, KB, MB, GB and TB. 🗺️ Area Converter Convert between square meters, square feet, acres and hectares. 🍁 Canadian Mortgage Calculator Calculate a Canadian mortgage payment with semi-annual compounding. 🔗 Debt Consolidation Calculator See if consolidating your debts into one loan saves money. ✖️ Rule of 72 Calculator Estimate how long it takes an investment to double. ⏰ Overtime Pay Calculator Calculate total pay including overtime hours. 📉 Weight Loss Percentage Calculator Calculate what percentage of weight you have lost. ➡️ Vector Calculator (2D) Find the magnitude and direction of a 2D vector. 🔢 Prime Number Checker Check whether a number is prime. 📏 Perimeter Calculator Calculate the perimeter of a rectangle, circle or triangle. 🌡️ Pressure Converter Convert between Pa, bar, psi, atm and mmHg. ⚡ Energy Converter Convert between joules, calories, watt-hours and BTU. 🧴 Volume Converter Convert between liters, milliliters and gallons. 📐 Angle Converter Convert between degrees, radians and gradians. 🔌 Power Converter Convert between watts, kilowatts, horsepower and BTU/h. ⛽ Fuel Consumption Converter Convert between L/100km, MPG and km/L. 📶 Download Time Calculator Estimate how long a file takes to download. 🛟 Emergency Fund Calculator Find how much you should keep in an emergency fund. 🚘 Car Affordability Calculator Estimate the car price you can comfortably afford. 📈 CAGR Calculator Calculate the compound annual growth rate of an investment. ✖️ Simultaneous Equations Solver Solve a system of two linear equations in two variables. 📍 Midpoint Calculator Find the midpoint between two points. 📐 3D Distance Calculator Find the distance between two points in 3D space. ➗ Linear Equation Solver Solve a linear equation of the form ax + b = c. 🔧 Torque Converter Convert between newton-meters, pound-feet and kg-meters. 💪 Force Converter Convert between newtons, pound-force and kilogram-force. 🔤 Number to Words Converter Spell out a number in words, in your chosen language. 🏃 Pace Converter Convert running pace between per-kilometer and per-mile. 🧱 Brick Calculator Estimate how many bricks you need for a wall. ⏱️ Time to Decimal Calculator Convert hours and minutes into decimal hours. 🌊 Wavelength Calculator Calculate the wavelength of a wave from its frequency. 🌙 Weight on the Moon Calculator Find how much you would weigh on the Moon and Mars.