Calculators

Compare unit prices to find the better deal. Enter price and quantity for two products to see which offers better value.

Fun compatibility calculator based on names. Enter two names to see your love compatibility score. Just for entertainment!

Calculate BMI with detailed category, healthy weight range, and BMI Prime. More comprehensive than basic BMI.

Estimate stamp duty tax on property purchases. Tiered rate calculation with total cost including duty.

Calculate your break-even point in units and revenue. Enter fixed costs, price per unit, and variable cost per unit.

Convert between hexadecimal, decimal, octal, and binary number systems. Free base converter for programmers.

Convert numbers to and from scientific notation. Also shows engineering notation. Free scientific notation calculator.

Calculate mean, variance, and standard deviation from a set of numbers. Shows both population and sample statistics.

Convert fractions to decimals and percentages. Also simplifies fractions using GCD. Free fraction converter.

Calculate percentage increase or decrease between two values. Shows absolute change and direction.

Calculate markup percentage and profit margin from cost and selling price. Understand the difference between markup and margin.

Calculate how long to reach your savings goal with monthly contributions and compound interest. Free savings timeline calculator.

Convert cat years to human years. Accounts for rapid aging in the first two years of a cat's life.

Convert dog years to human years. More accurate than the 7x rule — accounts for faster aging in early years.

Estimate your annual carbon footprint from driving, flying, electricity, and diet. See your CO2 emissions in tonnes per year.

Calculate electricity cost for any appliance. Enter wattage, usage hours, and rate to see daily, monthly, and yearly costs.

Plan your wedding budget with automatic category allocation. Enter total budget and guest count to see recommended spending per category.

Calculate monthly car loan payments, total interest, and total cost. Enter vehicle price, down payment, interest rate, and loan term.