Other Calculators
Dates and time, construction, electronics, conversions, transport and developer utilities.
56 of 56 available now
Date & Time
Age CalculatorFind your exact age in years, months, days, hours and minutes.Date CalculatorAdd or subtract days from a date, or measure the span between two dates.Time CalculatorAdd, subtract, multiply and divide time expressed in days, hours, minutes and seconds.Hours CalculatorCount the hours and minutes between two times, minus breaks.Time Duration CalculatorMeasure the precise duration between two date-times, down to seconds.Time Card CalculatorTotal a weekly timesheet with breaks, overtime and pay.Time Zone CalculatorConvert a time between any two world time zones, handling DST.Day CounterCount total, business and weekend days between two dates, excluding holidays.Day of the Week CalculatorFind which weekday any date in history or the future falls on.
Construction & Home
Concrete CalculatorCalculate concrete volume and bags needed for slabs, footings, columns and stairs.Square Footage CalculatorMeasure area in square feet, metres or yards for any room shape, plus material cost.Roofing CalculatorCalculate roof area, squares and shingle bundles from footprint and pitch.Tile CalculatorWork out how many tiles and boxes you need, including waste allowance and grout.Stair CalculatorDesign a code-compliant staircase: rise, run, stringer length and headroom.Mulch CalculatorCalculate mulch volume in cubic yards and bags for any bed size and depth.Gravel CalculatorEstimate gravel volume, weight and cost for driveways and paths.BTU CalculatorSize heating and cooling in BTUs for a room's dimensions, climate and insulation.
Electronics & Electrical
Ohms Law CalculatorSolve voltage, current, resistance and power from any two known values.Resistor CalculatorDecode resistor colour bands and compute series and parallel networks.Voltage Drop CalculatorCalculate voltage drop over a wire run and check it against code limits.Electricity CalculatorWork out an appliance's electricity use and what it costs per day, month and year.
Conversion & Units
Conversion CalculatorConvert length, weight, volume, temperature, area, speed, energy and more.Height CalculatorConvert height between feet/inches and centimetres, and predict a child's adult height.Shoe Size ConversionConvert shoe sizes between US, UK, EU, Japan and foot length.Bra Size CalculatorFind your bra size from bust and band measurements, with sister sizes.Roman Numeral ConverterConvert between Roman numerals and Arabic numbers in both directions.
Transport & Automotive
Fuel Cost CalculatorEstimate the fuel cost of a trip from distance, efficiency and fuel price.Gas Mileage CalculatorCalculate MPG or L/100km from distance travelled and fuel used.Mileage CalculatorCalculate mileage reimbursement at standard IRS or custom rates.Tire Size CalculatorCompare tire sizes for diameter, sidewall, circumference and speedometer error.Horsepower CalculatorCalculate horsepower from torque and RPM, or from elapsed time and trap speed.Engine Horsepower CalculatorEstimate engine horsepower from quarter-mile performance and vehicle weight.Speed CalculatorSolve for speed, distance or time, in any combination of units.
Physics & Chemistry
Density CalculatorSolve density, mass or volume from the other two, in any units.Mass CalculatorCalculate mass from density and volume, or from force and acceleration.Weight CalculatorConvert mass to weight under Earth or any other gravity, and between units.Molarity CalculatorSolve molarity, moles, mass or solution volume, plus dilution problems.Molecular Weight CalculatorCompute molar mass from a chemical formula with a per-element breakdown.GDP CalculatorCalculate GDP by the expenditure or income approach, plus real GDP and per capita.
Education
Developer & Networking
IPv6 Subnet CalculatorExpand, compress and subnet IPv6 addresses with prefix and range details.Password GeneratorGenerate strong random passwords locally in your browser, with entropy scoring.UUID GeneratorGenerate RFC 4122 version 4 UUIDs locally, with collision-probability maths for your volume.Word & Character CounterCount words, characters, sentences and paragraphs, with reading and speaking time estimates.Color ConverterConvert a colour between HEX, RGB and HSL and check its relative luminance for contrast work.Base64 Encode / DecodeEncode text to Base64 and decode it back, with URL-safe variant support.URL Encode / DecodePercent-encode and decode URLs and query components correctly.
Weather
Lifestyle & Fun
Tip CalculatorCalculate the tip and split the bill evenly or unevenly across the table.Sleep CalculatorFind the best bedtimes or wake times based on 90-minute sleep cycles.Golf Handicap CalculatorCalculate your World Handicap System index from your recent scores.Dice RollerRoll any dice combination with standard notation and see the distribution.Love CalculatorA light-hearted compatibility score from two names — strictly for fun.