All Calculators
Browse every calculator currently available on CalculatorSquare.
Percentage Calculator
Calculate percentages quickly with clear formulas and results.
Open calculator →EverydayRatio Calculator
Simplify ratios, calculate equivalent ratios, scale proportions and compare ratio shares.
Open calculator →EverydayAverage Calculator
Calculate mean, median, mode, range, sum, count and standard deviation from a list of numbers.
Open calculator →EverydayUnit Price Calculator
Compare two products by price, quantity, package count and compatible measurement units to find the better value.
Open calculator →EverydayRecipe Scaling Calculator
Scale an entire recipe for more or fewer servings with decimal, fraction and mixed-fraction ingredient amounts.
Open calculator →EverydayAge Calculator
Calculate your exact age from your date of birth.
Open calculator →EverydayTip Calculator
Calculate tip, total bill and cost per person.
Open calculator →EverydayDate Calculator
Add or subtract days from any calendar date.
Open calculator →EverydayDays Between Dates Calculator
Calculate the exact number of calendar days between two dates.
Open calculator →Time & WorkTime Card Calculator
Calculate weekly work hours from daily clock-in and clock-out times.
Open calculator →Time & WorkWork Hours Calculator
Calculate hours worked between two times after breaks.
Open calculator →Time & WorkDecimal Hours Calculator
Convert hours and minutes to decimal hours and back.
Open calculator →Time & WorkTime Duration Calculator
Calculate exact time between clock times or add and subtract durations.
Open calculator →Time & WorkBusiness Days Calculator
Count working days or add and subtract business days.
Open calculator →ConstructionFence Calculator
Estimate fence panels and posts from your project dimensions.
Open calculator →ConstructionGravel Calculator
Estimate cubic yards and approximate tons of gravel required.
Open calculator →ConstructionSand Calculator
Estimate sand volume, weight, tons, tonnes and optional material cost from project dimensions.
Open calculator →ConstructionTopsoil Calculator
Estimate topsoil volume, bags, weight and optional cost from area and soil depth.
Open calculator →ConstructionBoard Foot Calculator
Calculate lumber volume in board feet and estimate cost.
Open calculator →ConstructionConcrete Slab Calculator
Estimate cubic yards of concrete required for a slab.
Open calculator →ConstructionRebar Calculator
Estimate rebar quantity, length and weight for a slab grid.
Open calculator →ConstructionPaint Calculator
Estimate gallons of paint required for interior walls.
Open calculator →ConstructionMulch Calculator
Estimate mulch in cubic yards and bag quantities.
Open calculator →ConstructionRoofing Calculator
Estimate roofing squares and shingle bundle quantities.
Open calculator →ConstructionRoof Square Footage Calculator
Estimate sloped roof area from footprint and roof pitch.
Open calculator →ConstructionRoof Pitch Calculator
Calculate roof pitch, angle, slope percentage and slope factor.
Open calculator →ConstructionRoof Slope Calculator
Convert roof angle to pitch, slope percentage and slope factor.
Open calculator →ConstructionRoof Shingle Calculator
Estimate roof shingle bundles and roofing squares.
Open calculator →ConstructionCubic Yard Calculator
Calculate cubic yards from length, width and depth.
Open calculator →ConstructionCubic Feet Calculator
Calculate cubic feet from length, width and height.
Open calculator →ConstructionDrywall Calculator
Estimate drywall sheets needed from room dimensions and sheet size.
Open calculator →ConstructionStair Calculator
Estimate stair risers, treads, riser height and total run.
Open calculator →ConstructionDeck Material Calculator
Estimate deck board rows and linear feet of decking.
Open calculator →ConstructionPool Volume Calculator
Estimate pool volume in gallons and liters.
Open calculator →ElectricalVoltage Drop Calculator
Estimate voltage drop from current, distance and copper wire size.
Open calculator →ElectricalWire Size Calculator
Estimate copper wire gauge from load current.
Open calculator →ElectricalOhm's Law Calculator
Calculate voltage, current, resistance and power.
Open calculator →ElectricalResistor Color Code Calculator
Decode 4-band and 5-band resistor colors or generate color bands from resistance.
Open calculator →ElectricalSeries & Parallel Resistor Calculator
Calculate equivalent resistance for multiple resistors connected in series or parallel.
Open calculator →ElectricalVoltage Divider Calculator
Calculate Vout, Vin, R1 or R2 for a two-resistor voltage divider.
Open calculator →ElectricalPower Factor Calculator
Calculate power factor, kW, kVA, kVAR and phase angle from the AC power triangle.
Open calculator →ElectricalPower Factor Correction Calculator
Calculate capacitor kVAR needed to improve power factor and compare current before and after correction.
Open calculator →ElectricalTransformer Calculator
Calculate transformer primary and secondary full-load current from kVA and rated voltages.
Open calculator →ElectricalSeries & Parallel Capacitor Calculator
Calculate equivalent capacitance for capacitors in series or parallel, with optional charge, energy and voltage distribution.
Open calculator →ElectricalRC Time Constant Calculator
Calculate RC time constant, capacitor charging or discharging voltage, current, target time and cutoff frequency.
Open calculator →ElectricalBattery Runtime Calculator
Estimate battery runtime from capacity, voltage, load and efficiency.
Open calculator →ShippingCBM Calculator
Calculate cubic meters for cartons, pallets and freight.
Open calculator →ShippingDimensional Weight Calculator
Calculate dimensional weight and chargeable-weight estimate.
Open calculator →ShippingAir Freight Chargeable Weight Calculator
Calculate multi-piece air freight gross, volumetric and chargeable weight.
Open calculator →ShippingContainer Loading Calculator
Estimate cartons per 20ft, 40ft and 40ft High Cube container using dimensions, weight and rotation.
Open calculator →ShippingLCL Chargeable Volume Calculator
Calculate ocean LCL chargeable W/M from shipment CBM and gross weight, with optional minimum and freight-rate estimate.
Open calculator →DigitalDownload Time Calculator
Estimate file download time from size and internet speed.
Open calculator →ConstructionConcrete Calculator
Calculate concrete volume in cubic yards with waste allowance.
Open calculator →ConstructionConcrete Weight Calculator
Estimate concrete weight from dimensions or known volume using an editable concrete density.
Open calculator →ConstructionSquare Footage Calculator
Calculate square footage from length and width.
Open calculator →EverydayVolume Calculator
Calculate rectangular-prism and cylinder volume.
Open calculator →ConstructionLinear Feet Calculator
Calculate total linear footage with optional waste.
Open calculator →ConstructionConcrete Bag Calculator
Estimate premixed concrete bags for a rectangular pour.
Open calculator →ConstructionPost Hole Concrete Calculator
Estimate concrete volume and premix bags for circular post holes.
Open calculator →ConstructionConcrete Footing Calculator
Estimate concrete volume for rectangular foundation footings.
Open calculator →ConstructionConcrete Wall Calculator
Calculate concrete volume for poured walls.
Open calculator →ConstructionConcrete Block Calculator
Estimate masonry blocks, courses, waste and cost for a wall.
Open calculator →ConstructionRetaining Wall Block Calculator
Estimate retaining wall blocks, courses, buried base rows, caps, waste and optional cost.
Open calculator →ConstructionBrick Calculator
Estimate bricks needed for walls using brick size, mortar joints, openings, layers and waste.
Open calculator →ConstructionMortar Calculator
Estimate masonry mortar volume, dry materials, cement bags and sand from wall, brick or block, joint and mix dimensions.
Open calculator →ConstructionConcrete Driveway Calculator
Estimate concrete required for a driveway or parking pad.
Open calculator →ConstructionAsphalt Calculator
Estimate asphalt volume, tons, tonnes and optional material cost from area and compacted thickness.
Open calculator →ConstructionPaver Calculator
Estimate pavers needed for patios and walkways.
Open calculator →ConstructionFlooring Calculator
Estimate flooring square footage and boxes required.
Open calculator →ConstructionTile Calculator
Estimate tiles needed from project area and tile dimensions.
Open calculator →ConstructionSiding Calculator
Estimate siding square footage and siding squares.
Open calculator →ConstructionStud Calculator
Estimate wall studs from wall length and stud spacing.
Open calculator →ConstructionBTU Calculator
Estimate basic room cooling capacity in BTU per hour.
Open calculator →ElectricalAmps to Watts Calculator
Convert electrical current in amps to watts.
Open calculator →ElectricalWatts to Amps Calculator
Convert electrical power in watts to current in amps.
Open calculator →ElectricalElectricity Cost Calculator
Calculate appliance kWh usage and daily, monthly and yearly electricity cost.
Open calculator →ShippingFreight Class Calculator
Calculate freight density and a density-based freight class estimate.
Open calculator →ShippingPallet Calculator
Estimate cartons per pallet and total pallet capacity.
Open calculator →DigitalData Transfer Calculator
Calculate theoretical data transferred from speed and time.
Open calculator →DigitalFile Size Calculator
Convert file sizes between bytes, KB, MB, GB and TB.
Open calculator →DigitalVideo File Size Calculator
Calculate video file size from bitrate and duration or find the bitrate needed for a target file size.
Open calculator →DigitalAudio File Size Calculator
Estimate PCM, WAV and compressed audio file size, data rate and recording duration from audio settings.
Open calculator →DigitalAspect Ratio Calculator
Resize images and video while preserving the correct proportions.
Open calculator →DigitalPPI Calculator
Calculate pixels per inch, pixel pitch, megapixels, aspect ratio and physical screen dimensions.
Open calculator →DigitalPrint Size Calculator
Convert image pixels and PPI into print dimensions or calculate pixels needed for a target print size.
Open calculator →DigitalScreen Size Calculator
Calculate physical screen width, height, diagonal, area and perimeter from display size and aspect ratio.
Open calculator →Find the right calculator for your task
CalculatorSquare groups tools by the type of problem they solve. Use Everyday for percentages, dates, age, tips and basic volume; Time & Work for shifts and timesheets; Construction for material and project estimates; Electrical for common electrical formulas; Shipping for freight and pallet calculations; and Digital for file, ratio and data transfer calculations.
Each calculator focuses on a specific question so the inputs, units and assumptions stay clear. For important project, safety or commercial decisions, review the notes and limitations on the individual calculator page before relying on the result.