Split a bill, compare two loans, work out a margin, check a grade. None of the maths is hard. It is just easy to get wrong when you are standing in a shop or halfway through a spreadsheet, and these give you the answer with the working shown.
- Percentage CalculatorWork out percentages, increases, and decreases.
- BMI CalculatorCalculate body mass index from height and weight.
- Tip CalculatorSplit a bill and calculate the tip per person.
- Loan / EMI CalculatorEstimate monthly loan payments and total interest.
- Discount CalculatorFind the sale price after a percentage discount.
- Compound Interest CalculatorSee how savings or investments grow with compound interest and monthly deposits.
- Mortgage CalculatorEstimate monthly mortgage payments with tax, insurance, and extra payments.
- Savings Goal CalculatorFind how long a savings goal will take, or how much to save each month.
- ROI CalculatorWork out return on investment and annualised growth.
- Profit Margin & Markup CalculatorCalculate profit margin and markup, or set a price from your cost.
- VAT / GST / Sales Tax CalculatorAdd tax to a price or take it out of a total in one step.
- Salary ConverterConvert pay between hourly, daily, weekly, monthly, and yearly.
- Inflation CalculatorSee what prices and savings are worth after years of inflation.
- Break-Even CalculatorFind how many units you must sell to cover your costs.
- Calorie CalculatorEstimate daily calorie needs from your age, size, and activity.
- Daily Water Intake CalculatorEstimate how much water you should drink each day.
- GPA CalculatorCalculate term and cumulative GPA from letter grades and credits.
- Final Grade CalculatorFind the score you need on a final exam to reach your target grade.
- Fraction CalculatorAdd, subtract, multiply, and divide fractions and mixed numbers.
- Statistics CalculatorMean, median, mode, standard deviation, and quartiles for any list of numbers.
- Ratio CalculatorSolve ratios and proportions, or check whether two ratios match.
- GCD & LCM CalculatorFind the greatest common divisor, least common multiple, and prime factors.
- Prime Number CheckerCheck if a number is prime, factor it, or list all primes up to a limit.
- Quadratic Equation SolverSolve ax² + bx + c = 0, including complex roots, and see the vertex.