Age calculator
Your exact age on any date, from your DOB.
Open tool YOUR EVERYDAY TOOLKIT
Calculators.
Less effort, more done.
Work out everyday costs, compare numbers, solve maths questions or check calendar dates. Each calculator includes its formula and an example.
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A LITTLE EVERYDAY MAGIC
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Simple tools. One job, done well.
Percentage calculator
Calculate a percentage, share or change.
Open toolDiscount calculator
See the sale price and exactly what you save.
Open toolDate difference
Count days and weeks between two dates.
Open toolBasic calculator
Everyday arithmetic, with brackets.
Open toolWork-hours calculator
Calculate a shift, minus unpaid breaks.
Open toolFuel cost calculator
Calculate fuel needed and trip cost.
Open toolTip & bill splitter
Split a restaurant bill including a tip.
Open toolSales tax calculator
Add tax or extract tax from an inclusive price.
Open toolLoan payment calculator
Estimate a fixed-rate monthly loan payment.
Open toolCompound interest calculator
Estimate savings with annual compounding.
Open toolRatio simplifier
Reduce two whole numbers to their simplest ratio.
Open toolSquare root calculator
Calculate the square root of a number.
Open toolAverage & statistics
Find mean, median, minimum and maximum.
Open toolFraction calculator
Add, subtract, multiply or divide fractions.
Open toolRunning pace calculator
Calculate pace from distance and time.
Open toolPower calculator
Calculate a number raised to a power.
Open toolLogarithm calculator
Find a logarithm in any valid base.
Open toolFactorial calculator
Calculate exact factorials up to 1,000.
Open toolPrime number checker
Check whether a whole number is prime.
Open toolGCD calculator
Find the greatest common divisor.
Open toolLCM calculator
Find the least common multiple.
Open toolRemainder calculator
Find the remainder after integer division.
Open toolNumber rounding
Round a number to selected decimal places.
Open toolCircle calculator
Find area and circumference from a radius.
Open toolRectangle calculator
Find area, perimeter and diagonal.
Open toolTriangle area calculator
Calculate area from base and height.
Open toolPythagorean calculator
Find the hypotenuse of a right triangle.
Open toolMarkup calculator
Set a selling price from cost and markup.
Open toolProfit margin calculator
Calculate gross profit and margin.
Open toolBreak-even calculator
Estimate units needed to cover fixed costs.
Open toolSimple interest calculator
Calculate interest without compounding.
Open toolUnit price calculator
Compare price per item or unit.
Open toolSavings goal calculator
Calculate a monthly saving target.
Open toolElectricity cost calculator
Estimate an appliance’s energy cost.
Open toolAdd or subtract days
Find the date a number of days away.
Open toolDay of week finder
Find which weekday a date falls on.
Open toolLeap year checker
Check a year and its number of days.
Open toolDays in month
Count days in any month and year.
Open toolWeekday counter
Count Monday–Friday dates in a range.
Open toolCube calculator
Find a cube’s volume and surface area.
Open toolCylinder calculator
Calculate cylinder volume and total surface area.
Open toolSphere calculator
Calculate sphere volume and surface area.
Open toolTrapezoid area calculator
Find area from two parallel sides and height.
Open toolQuadratic equation solver
Find real or complex roots of ax² + bx + c = 0.
Open toolCombinations calculator
Count ways to choose r items from n.
Open toolPermutations calculator
Count ordered selections of r items from n.
Open toolDecimal to fraction
Convert a decimal to an exact reduced fraction.
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