All calculators
Every calculator on the site, grouped by category.
Finance
MortgageMonthly payment & amortizationComing soon
LoanRepayment schedule & total interestComing soon
Compound InterestGrowth of savings over timeComing soon
SavingsReach a savings goalComing soon
50/30/20 BudgetNeeds, wants and savingsComing soon
ROIReturn on investment and annualized returnComing soon
Retirement WithdrawalHow long your savings last with yearly withdrawalsComing soon
MarkupMarkup and margin from cost and priceComing soon
CDInterest and balance of a certificate of depositComing soon
DividendDividend income and reinvestment projectionComing soon
Dollar Cost AveragingAverage cost per share when investing regularlyComing soon
RefinanceMonthly saving and break-even of a refinanceComing soon
Loan RecastNew payment after a lump-sum recastComing soon
Line of Credit InterestInterest and payoff time on a line of creditComing soon
Tax & Pay
Take-Home PaySalary after Income Tax and National InsuranceVATAdd or remove VAT at 20%, 5% or 0%National InsuranceEmployee, employer and self-employed NI for 2026/27Dividend TaxTax on dividends after the £500 allowancePro Rata SalaryPart-time salary and holiday from full-time
Salary to HourlyConvert pay between periodsComing soon
Construction & Home
GravelTons & cubic yards for drivewaysComing soon
ConcreteCubic yards, bags & cost estimateComing soon
MulchCubic yards for garden bedsComing soon
AsphaltTons for pavingComing soon
Paver BaseSand & stone baseComing soon
TileTiles and boxes for floors and wallsComing soon
Roof PitchPitch, angle and slopeComing soon
Cubic YardVolume in cubic yardsComing soon
BaseboardTrim length and piecesComing soon
Watt-HourBattery energy and runtimeComing soon
Plant SpacingPlants per bedComing soon
MortarBags for blocks and bricksComing soon
AC SizeBTU for a room air conditionerComing soon
Pool SaltSalt to add to a poolComing soon
Board FootLumber volume in board feetComing soon
BrickBricks for a wallComing soon
PlywoodSheets of plywood neededComing soon
RoofingSquares and shingle bundlesComing soon
Watts to AmpsConvert watts and ampsComing soon
LED ResistorSeries resistor for an LEDComing soon
Pool VolumeGallons and liters in a poolComing soon
Rainwater HarvestingRainwater collected from a roofComing soon
Potting SoilPotting mix for potsComing soon
Cubic InchVolume and conversionsComing soon
CFMAirflow for a room or ductComing soon
Exterior PaintGallons for a houseComing soon
SandCubic yards and tons of sandComing soon
StoneLandscape rock by weightComing soon
Square FootageArea of rooms and lotsComing soon
FlooringSquare feet, boxes and cost for a roomComing soon
Linear FeetTotal length of boards, trim or fencingComing soon
AcreageAcres and hectares of a lot or fieldComing soon
Rafter LengthCommon rafter length from span and pitchComing soon
Wall StudsStuds and plates for a framed wallComing soon
Health & Fitness
Fat IntakeDaily fat range in gramsComing soon
Fiber IntakeDaily fiber goalComing soon
Adjusted AgeCorrected age for preemiesComing soon
Weight Loss PercentagePercent of body weight lostComing soon
Max Heart RateMaximum heart rate by ageComing soon
BMIBody mass index with health rangesComing soon
CalorieDaily energy needsComing soon
Body FatEstimate body fat percentageComing soon
FFMIFat-free mass index from height and body fatComing soon
Steps to CaloriesCalories burned walking from your stepsComing soon
MacroProtein, carbs and fat in gramsComing soon
Breastfeeding CaloriesDaily calories while nursingComing soon
PaceRunning pace, time and distanceComing soon
Math & Statistics
Coefficient of VariationCV as a percentage of the meanComing soon
Expected ValueMean of a discrete distributionComing soon
T-TestOne, two-sample and pairedComing soon
IQRQuartiles and outliersComing soon
Standard ErrorSE of the mean and confidence intervalComing soon
Percent ErrorError against an accepted valueComing soon
Cohen's dEffect size for two groupsComing soon
Multiplying PolynomialsExpand the product of two polynomialsComing soon
Zeros of a FunctionReal and complex zeros of a polynomialComing soon
SlopeSlope, equation and distance between two pointsComing soon
Square RootSquare and nth roots, with simplified radicalsComing soon
DecimalExact decimal addition, subtraction, multiplication and divisionComing soon
Cylinder VolumeVolume and surface area of a cylinderComing soon
Interval NotationConvert inequalities and interval notationComing soon
Pythagorean TheoremHypotenuse or missing leg of a right triangleComing soon
Inverse TangentArctan and atan2 in degrees and radiansComing soon
Golden RatioSplit a length in the golden proportionComing soon
Sector AreaArea of a circular sectorComing soon
Arc LengthLength of a circular arcComing soon
Vertex FormConvert a quadratic to vertex formComing soon
ParabolaVertex, focus and intercepts of a parabolaComing soon
Exponential GrowthGrowth or decay at a steady rateComing soon
Geometric Sequencenth term and sum of a geometric sequenceComing soon
Two-Step EquationSolve ax + b = c step by stepComing soon
IntegerSigned whole-number arithmeticComing soon
Order of OperationsEvaluate an expression step by stepComing soon
Sigma NotationSum an expression over a rangeComing soon
PercentagePercentage of, change & differenceComing soon
FractionAdd, subtract and simplifyComing soon
Standard DeviationSpread of a data setComing soon
Binomial DistributionExact and cumulative probabilitiesComing soon
Everyday & Auto
Hours WorkedTimesheet totalsComing soon
Time to DecimalConvert hours and minutes to decimal hours and backComing soon
Engine DisplacementSwept volume of an engine from bore, stroke and cylindersComing soon
Electricity CostCost of running an appliance from watts, hours and rateComing soon
Days Between DatesDays, weeks and weekdays between two datesComing soon
Elapsed TimeTime between a start and an endComing soon
TimecodeAdd or subtract video timecodes, with drop-frameComing soon
Unit PriceCompare price per ounce, pound or literComing soon
EV Charging CostCost to charge an electric car and cost per mileComing soon
Hours From NowDate and time a number of hours from nowComing soon
Compression RatioStatic engine compression ratio from its dimensionsComing soon
Grams to CupsConvert grams to cups for baking ingredientsComing soon
Average TimeAverage of a list of times, laps or splitsComing soon
Pizza DoughFlour, water, salt and yeast for pizza dough ballsComing soon
TipTip and split the billComing soon
Gas MileageMPG and fuel costComing soon
AgeExact age in years, months and daysComing soon
Science & Physics
Projectile MotionRange, flight time and maximum height of a projectileComing soon
ForceForce, mass or acceleration from F = m × aComing soon
AccelerationAcceleration from speed change, force or distanceComing soon
KinematicsSolve constant-acceleration motion problemsComing soon
Speed Distance TimeSpeed, distance or time from the other twoComing soon
Ideal Gas LawSolve PV = nRT for pressure, volume, moles or temperatureComing soon
School & Grades
GPAWeighted and unweighted GPAComing soon
Test ScorePercent score and letter grade from questions wrongComing soon
Semester GradeWeighted semester grade from periods and an examComing soon
Cumulative GPANew cumulative GPA after this termComing soon
Final GradeScore needed on the final to reach a target gradeComing soon
Pets
Cat AgeCat years to human yearsComing soon
Dog AgeDog years to human yearsComing soon
Dog PregnancyDue date and gestation rangeComing soon
Dog Heat CycleEstimate when your dog's next heat may startComing soon
Dog FoodDaily calories and cups of food for a dogComing soon