Calculators
Finance, health, math and student calculators.
82 tools in this category.
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
Compound Interest Calculator
Calculate compound interest and future value of savings and investments.
Scientific Calculator
Free online scientific calculator with sin, cos, tan, log, sqrt and more.
AdSense Earnings Calculator
Estimate your Google AdSense earnings from page views, click-through rate and cost per click.
Area Calculator
Calculate the area of rectangles, squares, circles and triangles with standard geometry formulas.
Average Calculator
Calculate the mean, median, sum, count, minimum and maximum of any list of numbers.
Break-Even Calculator
Find how many units you must sell to break even, from fixed costs, price and variable cost per unit.
Car Loan Calculator
Calculate your monthly car loan payment, total interest and total cost with the standard EMI formula.
Cube Root Calculator
Find the cube root of any number instantly — ∛x, including negative numbers.
Distance Calculator
Calculate distance from speed and time with the formula distance = speed × time.
Fraction Calculator
Add, subtract, multiply and divide fractions with automatic simplification to lowest terms.
Home Loan EMI Calculator
Calculate your monthly home loan EMI, total interest and total payment with the standard EMI formula.
Hourly to Salary Calculator
Convert an hourly wage into an annual, monthly and weekly salary based on your working hours.
Income Tax Calculator
Estimate US federal income tax for a single filer using simplified 2024 tax brackets. Estimate only — not tax advice.
Inflation Calculator
See how inflation changes the value of money over time — future prices and today's purchasing power.
Invoice Generator
Create a professional invoice in your browser — fill in your details and line items, then print or download it.
Personal Loan Calculator
Calculate your monthly personal loan EMI, total interest and total repayment with the standard EMI formula.
Probability Calculator
Calculate the probability of coin flips, dice rolls and simple events — as a percentage, decimal and odds.
Profit Margin Calculator
Calculate gross profit, profit margin and markup from revenue and cost in seconds.
Ratio Calculator
Simplify ratios to lowest terms and scale a ratio up or down by any factor.
Retirement Calculator
Estimate how much your retirement savings could grow with monthly contributions and compound returns.
ROI Calculator
Calculate return on investment (ROI) as a percentage from cost and gain. ROI = (gain − cost) ÷ cost × 100.
Salary to Hourly Calculator
Convert an annual salary into an hourly wage based on your weekly hours and working weeks.
Speed Calculator
Calculate speed, distance or time with the formula speed = distance ÷ time. Pick what to solve for.
Square Root Calculator
Find the square root of any number instantly — √x with a step-by-step check.
Stock Return Calculator
Calculate your total and annualized return on a stock investment, including dividends and fees.
Tax Calculator
Estimate your income tax with a simple progressive slab calculator. A quick estimate — not tax advice.
Time Calculator
Calculate travel time from distance and speed with the formula time = distance ÷ speed.
Volume Calculator
Calculate the volume of cubes, cuboids, cylinders and spheres with standard geometry formulas.
Blood Alcohol Calculator
Estimate your blood alcohol concentration (BAC) from drinks, body weight, sex and time using the Widmark formula — free online estimator. — free, no sign-up, works in your browser.
Blood Pressure Checker
Check what your blood pressure reading means — enter systolic and diastolic values to see your category under standard guidelines — free online. — free, no sign-up, works in your browser.
Body Fat Calculator
Estimate your body fat percentage with the U.S. Navy method using height and tape measurements — free online. — free, no sign-up, works in your browser.
Carb Calculator
Calculate how many grams of carbohydrates you need per day from your daily calories and carb percentage — free online. — free, no sign-up, works in your browser.
Compatibility Calculator
Check your fun compatibility score with a partner, friend or crush from your names and birthdays — for entertainment only. — free, no sign-up, works in your browser.
Credit Card Payoff Calculator
Find out how long it will take to pay off your credit card and how much interest you will pay — free online. — free, no sign-up, works in your browser.
Crypto Converter
Convert between cryptocurrencies and fiat currencies — BTC, ETH, SOL, USDT and more to USD, EUR, GBP, PKR or INR. — free, no sign-up, works in your browser.
Due Date Calculator
Calculate your pregnancy due date from the first day of your last menstrual period, plus your conception date and trimester milestones — free online. — free, no sign-up, works in your browser.
FD Calculator
Calculate the maturity value and interest earned on a fixed deposit with quarterly, monthly or yearly compounding — free online. — free, no sign-up, works in your browser.
Grade Calculator
Calculate your weighted course grade from assignments and their weights, with the letter grade — free online. — free, no sign-up, works in your browser.
Heart Rate Calculator
Find your maximum heart rate, target training zones and heart rate reserve from your age and resting heart rate — free online. — free, no sign-up, works in your browser.
Ideal Weight Calculator
Find your ideal weight range using the Devine formula and the healthy BMI range for your height — free online. — free, no sign-up, works in your browser.
Ovulation Calculator
Predict your ovulation day and fertile window from the first day of your last period and your cycle length — free online. — free, no sign-up, works in your browser.
Percentage to CGPA Calculator
Convert your percentage marks to CGPA on the 10-point scale (percentage / 9.5) — free online. — free, no sign-up, works in your browser.
Pregnancy Calculator
Find how many weeks pregnant you are, your trimester, due date and key milestones from your last period — free online. — free, no sign-up, works in your browser.
Pregnancy Due Date Calculator
Calculate your pregnancy due date from your last period date or your conception date — free online. — free, no sign-up, works in your browser.
Protein Intake Calculator
Calculate how much protein you need per day from your body weight and activity level — free online. — free, no sign-up, works in your browser.
RD Calculator
Calculate the maturity value of a recurring deposit from your monthly deposit, interest rate and tenure — free online. — free, no sign-up, works in your browser.
Running Pace Calculator
Calculate your running pace per kilometre and per mile, and your average speed, from distance and time — free online. — free, no sign-up, works in your browser.
Savings Calculator
Calculate how your savings grow with regular monthly deposits and compound interest — free online. — free, no sign-up, works in your browser.
Steps to Calories Calculator
Convert your daily steps into calories burned and distance walked from your body weight — free online. — free, no sign-up, works in your browser.
Water Intake Calculator
Calculate how much water you should drink per day from your body weight and activity level — free online. — free, no sign-up, works in your browser.
Workout Timer
A free interval workout timer — set work and rest seconds and rounds, then start, pause and reset your training session. — free, no sign-up, works in your browser.
Present Value Calculator
Calculate the present value of a future sum of money, discounted at a given interest rate — free online. — free, no sign-up, works in your browser.
Future Value Calculator
Calculate the future value of an investment or savings with compound interest and regular contributions — free online. — free, no sign-up, works in your browser.
Fuel Cost Calculator
Calculate the cost of a trip from distance, fuel efficiency and fuel price — free online. — free, no sign-up, works in your browser.
Electricity Cost Calculator
Work out how much an appliance costs to run — enter its watts, hours used and your electricity rate — free online. — free, no sign-up, works in your browser.
Paint Needed Calculator
Work out how many litres or gallons of paint you need for a room, including coats and coverage — free online. — free, no sign-up, works in your browser.
Dog Age Calculator
Convert your dog's age into human years by size — small, medium or large breed — free online. — free, no sign-up, works in your browser.
Aspect Ratio Calculator
Calculate the aspect ratio of any image or screen, simplify a ratio like 1920x1080 to 16:9, and find a missing width or height — free online. — free, no sign-up, works in your browser.
Percent Increase Calculator
Calculate the percentage increase between two numbers — price rises, salary hikes, or any growth — free online. — free, no sign-up, works in your browser.
Percent Decrease Calculator
Calculate the percentage decrease between two numbers — price drops, weight loss, or any fall in value — free online. — free, no sign-up, works in your browser.
Mortgage Affordability Calculator
Work out how much house you can afford from your income, debts, deposit and interest rate — free online. — free, no sign-up, works in your browser.
Debt-to-Income Calculator
Calculate your debt-to-income (DTI) ratio from gross monthly income and monthly debt payments — free online. — free, no sign-up, works in your browser.
Net Worth Calculator
Add up your assets, subtract your debts, and find your net worth — free online. — free, no sign-up, works in your browser.
Carbon Footprint Calculator
Estimate your yearly carbon footprint in tonnes of CO2 from electricity, driving, flights and diet — free online. — free, no sign-up, works in your browser.