Calculate anything.
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Calculate your monthly mortgage payments, total interest, and total cost of your home loan.

Calculate how your savings or investments grow over time with compound interest.

Calculate monthly loan repayments, total interest, and total cost for personal loans, car finance, and more.

Convert your salary between yearly, monthly, weekly, daily, and hourly rates. See your take-home pay after tax.

Add or remove VAT from any amount. Supports UK standard rate (20%), reduced rate (5%), and custom rates.

Calculate how your savings will grow over time with regular deposits and compound interest.

Calculate the future value of your investments based on initial investment, regular contributions, and expected rate of return.

Convert an hourly wage to an annual salary, or an annual salary to an hourly rate. Factor in hours per week and weeks per year.

Use the 50/30/20 budget rule to allocate your after-tax income to needs, wants, and savings.

Project how much your retirement savings will grow and estimate whether you are on track to meet your retirement income goal.

Calculate how long it will take to pay off your credit card balance and how much total interest you will pay.

Calculate simple interest on a principal amount using the formula I = P × r × t. Find total interest earned or owed.

Calculate how inflation affects the purchasing power of your money over time. See what today's money will be worth in the future.

Calculate your total net worth by adding up all your assets and subtracting all your liabilities. Track your financial health over time.

Calculate your effective tax rate by dividing total tax paid by your gross income. Compare your actual tax burden to marginal tax brackets.

Calculate your Body Mass Index (BMI) to check whether you are at a healthy weight for your height.

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

Find your ideal weight range based on height and gender using multiple established formulas.

Calculate your estimated due date and see key pregnancy milestones based on your last menstrual period.

Estimate your body fat percentage using the US Navy method based on body measurements.

Calculate your optimal daily macronutrient intake — protein, carbohydrates, and fat — based on your goals.

Calculate your recommended daily water intake based on your body weight, activity level, and climate.

Calculate your target heart rate training zones using the Karvonen formula for more effective workouts.

Calculate the best times to fall asleep or wake up based on 90-minute sleep cycles for more refreshing rest.

Estimate your blood alcohol content (BAC) based on drinks consumed, body weight, gender, and time elapsed.

Estimate your ovulation date and fertile window based on your menstrual cycle length and last period date.

Calculate calories burned during exercise and daily activities using MET (Metabolic Equivalent of Task) values.

Calculate percentages easily — find what percent of a number is, percentage change, and more.

Add, subtract, multiply, and divide fractions. Simplifies results to the lowest terms automatically.

Calculate the area of common shapes — rectangle, circle, triangle, trapezium, and more.

Calculate the mean, median, mode, and range from any set of numbers. Enter your data and get all four measures of central tendency instantly.

Solve proportions and find the missing value in A:B = C:D. Simplify ratios, scale recipes, convert map distances, and work with any proportional relationship.

Solve any quadratic equation ax² + bx + c = 0. Get both roots, the discriminant, vertex coordinates, and axis of symmetry with full working shown.

Calculate any power or root. Enter a base and exponent to compute bⁿ, including negative exponents, fractional exponents (roots), and zero power.

Find the Least Common Multiple (LCM) and Highest Common Factor (HCF/GCD) of two or more numbers. Uses prime factorisation and the Euclidean algorithm with step-by-step working.

Convert between Roman numerals and standard (Arabic) numbers. Enter a Roman numeral like XIV or a number like 2024 and get the conversion instantly with the breakdown explained.

Convert between standard notation and scientific notation. Enter any number and get it expressed as a × 10ⁿ, or enter scientific notation to see the full number.

Check if a number is prime, find its complete prime factorisation, and list all prime numbers up to a given limit. Uses trial division and the Sieve of Eratosthenes.

Calculate your exact age in years, months, and days. Find the time between any two dates.

Add or subtract days, weeks, or months from any date. Find the difference between two dates.

Calculate the tip amount and total bill. Split the bill evenly between any number of people.

Calculate the sale price after a percentage discount. See how much you save on any purchase.

Convert length, weight, temperature, volume, and speed between common metric and imperial units instantly.

Calculate the fuel needed and total cost for any journey based on distance, fuel efficiency, and price per litre or gallon.

Estimate how long it takes to read or speak any text based on word count and average reading or speaking speed.

Calculate your weighted average grade across multiple assignments, convert to letter grade and GPA on a 4.0 scale.

Calculate your running or walking pace, speed, and projected finish times for any distance including 5K, 10K, half marathon, and marathon.

Add or subtract hours, minutes, and seconds, or find the exact duration between two times of day.

Calculate your semester and cumulative GPA on a 4.0 scale by entering courses, grades, and credit hours.

Calculate how much paint you need for a room based on wall dimensions, number of coats, and standard tin sizes (1L, 2.5L, 5L).