Everyday Tools Calculators
27 free calculators in this category. Every result is worked out in your browser — nothing you type is sent anywhere.
Absolute Value Calculator
Find the absolute value (distance from zero) of any positive or negative number instantly.
Open calculatorAge Calculator
Calculate an exact age in years or the precise difference between two calendar dates broken down into years, months, weeks and days for any occasion.
Open calculatorAverage Calculator
Calculate the mean of up to eight numbers, useful for averaging test scores, bills or measurements.
Open calculatorBMI and Health Calculator
Estimate your BMI, WHO weight category, healthy weight range, waist-based health risk and daily energy needs in kilojoules and kilocalories.
Open calculatorDate Difference Calculator
Work out the total days, business days, weeks, months and years between two dates, with optional weekend and national public holiday exclusions.
Open calculatorExponent Calculator
Raise a base number to any power, including negative or fractional exponents, and see the result instantly.
Open calculatorFactorial Calculator
Calculate the factorial of a whole number, useful for permutations, combinations and probability problems.
Open calculatorFraction to Percentage Calculator
Convert any fraction, such as marks out of a test or a recipe ratio, into a percentage instantly.
Open calculatorGreatest Common Divisor Calculator
Find the greatest common divisor (GCD) and lowest common multiple (LCM) of two whole numbers using the Euclidean algorithm.
Open calculatorLogarithm Calculator
Calculate the logarithm of a number to any base, including common log (base 10) and natural log (base e).
Open calculatorMedian Calculator
Find the median (middle value) of up to eight numbers, a useful measure of the centre that isn't skewed by outliers.
Open calculatorMode Calculator
Find the most frequently occurring value (or values) among up to eight numbers you enter.
Open calculatorNth Root Calculator
Calculate the nth root of a number, such as a cube root or fourth root, for any positive whole-number degree.
Open calculatorPaint Coverage Calculator
Work out paintable wall and ceiling area, litres of paint needed, tins to buy and total estimated cost, with editable door and window deductions.
Open calculatorPercentage Calculator
Quick percentage of a value, percentage increase and percentage decrease calculations for everyday Australian maths, shopping discounts and quick sums.
Open calculatorPercentage Change Calculator
Calculate percentage of a number, percentage change between two values, increase or decrease by a percentage and what percentage one number is of another.
Open calculatorPercentage Difference Calculator
Work out the percentage difference between two numbers, useful for comparing prices, scores or measurements quickly.
Open calculatorPercentage to Fraction Calculator
Convert a percentage into its simplest fraction form, showing both the raw and simplified fractions.
Open calculatorProportion Calculator
Solve for the missing value in a proportion, such as scaling ingredients or converting rates, using cross-multiplication.
Open calculatorRange Calculator
Calculate the statistical range — the difference between the highest and lowest of up to eight numbers.
Open calculatorRatio Calculator
Simplify a ratio of two or three numbers to its lowest terms, useful for recipes, mixing solutions or scaling drawings.
Open calculatorReverse Percentage Calculator
Find the original value before a percentage increase or decrease was applied, handy for working backwards from a sale price or tax-inclusive figure.
Open calculatorRounding Calculator
Round a number to a chosen number of decimal places, or to the nearest 10, 100 or 1000, with standard rounding rules.
Open calculatorScientific Notation Calculator
Convert a number between standard decimal form and scientific notation, showing the exponent and coefficient clearly.
Open calculatorSquare Root Calculator
Find the square root of a number, with a clear error message for negative inputs since real square roots don't exist for them.
Open calculatorUnit Conversion Calculator
Convert length, weight, volume, area, temperature, speed and fuel economy units, including litres per 100km, km per litre and miles per gallon.
Open calculatorWeighted Average Calculator
Calculate a weighted average from up to four value and weight pairs, ideal for grades where assessments carry different weightings.
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