All calculators

Dates & calendars9

• Age and zodiacage.emonster.tools
• Date differencedatediff.emonster.tools
• Add or subtract datesdateadd.emonster.tools
• Japanese era converterera.emonster.tools
• Korean age comparisonkoreanage.emonster.tools
• Taiwan Republic yeartaiwanyear.emonster.tools
• Thai Buddhist yearbuddhistyear.emonster.tools
• Julian / Gregorian datesjuliancalendar.emonster.tools
• Business daysbusinessdays.emonster.tools

Clocks & time12

• Time durationduration.emonster.tools
• Work hours and timesheettimesheet.emonster.tools
• Time zone meeting plannermeetingtime.emonster.tools
• Date and time countdowncountdown.emonster.tools
• World clockworldclock.emonster.tools
• Time zone convertertimezone.emonster.tools
• Online clockclock.emonster.tools
• Alarm clockalarm.emonster.tools
• Stopwatchstopwatch.emonster.tools
• Countdown timertimer.emonster.tools
• Decimal hours converterdecimalhours.emonster.tools
• Playback speed and timeplaybacktime.emonster.tools

Money & finance15

• Currency conversioncurrency.emonster.tools
• Precious-metal conversionpreciousmetals.emonster.tools
• Discount calculatordiscount.emonster.tools
• Sales tax and VATsalestax.emonster.tools
• Tip and bill splittipsplit.emonster.tools
• Unit price comparisonunitprice.emonster.tools
• Compound interestcompound.emonster.tools
• Loan repaymentloan.emonster.tools
• Savings goalsavings.emonster.tools
• Debt payoff estimatordebtpayoff.emonster.tools
• Inflation and purchasing powerinflation.emonster.tools
• Cashback and reward valuerewards.emonster.tools
• Compound annual growth ratecagr.emonster.tools
• Shared-expense settlementexpenses.emonster.tools
• Rent versus buy equipmentrentorbuy.emonster.tools

Math & statistics15

• Roman numeralsroman.emonster.tools
• Percentage calculatorpercentage.emonster.tools
• Percentage changepercentchange.emonster.tools
• Fraction calculatorfractions.emonster.tools
• Ratios and proportionsratios.emonster.tools
• Average and descriptive statisticsaverages.emonster.tools
• Number base converternumberbase.emonster.tools
• Scientific notation converterscientificnotation.emonster.tools
• Final grade target calculatorfinalgrade.emonster.tools
• GCD and LCM calculatorgcdlcm.emonster.tools
• Quadratic equation solverquadratic.emonster.tools
• Right triangle calculatorrighttriangle.emonster.tools
• Circle area and circumferencecircle.emonster.tools
• Sphere volume and surface areasphere.emonster.tools
• Trapezoid area calculatortrapezoid.emonster.tools

Unit converters27

Home & garden15

• Cut-list plannercutlist.emonster.tools
• Paint coveragepaint.emonster.tools
• Wallpaper rollswallpaper.emonster.tools
• Tile quantitytiles.emonster.tools
• Flooring quantityflooring.emonster.tools
• Concrete volumeconcrete.emonster.tools
• Soil and mulch volumesoil.emonster.tools
• Paver quantitypavers.emonster.tools
• Fence posts and panelsfence.emonster.tools
• Brick and block quantitybricks.emonster.tools
• Tile grout quantitygrout.emonster.tools
• Garden planting layoutplanting.emonster.tools
• Tank and aquarium volumetankvolume.emonster.tools
• Slope, grade and rise/runslope.emonster.tools
• Lawn seed quantity calculatorlawnseed.emonster.tools

Crafts & materials9

• Label sheet layoutlabelsheet.emonster.tools
• Booklet printing plannerbooklet.emonster.tools
• Knitting and crochet gaugestitchgauge.emonster.tools
• Scale-model converterscalemodel.emonster.tools
• Curtain fabric plannercurtains.emonster.tools
• Resin batch mixerresinmix.emonster.tools
• Candle batch plannercandles.emonster.tools
• Epoxy pour and coating quantityepoxypour.emonster.tools
• Fabric shrinkage calculatorshrinkage.emonster.tools

Cooking & drinks15

• Recipe scalingrecipescale.emonster.tools
• Kitchen measures: spoons, cups and gramscupsgrams.emonster.tools
• Baker percentagebakerspercent.emonster.tools
• Baking pan size scalingpansize.emonster.tools
• Brine concentrationbrine.emonster.tools
• Coffee brew ratiocoffeeratio.emonster.tools
• Fermentation alcohol estimateabv.emonster.tools
• Alcohol blending and dilutionalcoholdilution.emonster.tools
• Wine bottling and servingswinebottles.emonster.tools
• Coffee extraction yieldcoffeeextraction.emonster.tools
• Iced coffee plannericedcoffee.emonster.tools
• Cold-brew dilutioncoldbrew.emonster.tools
• Sourdough starter and levain buildersourdough.emonster.tools
• Yeast substitution calculatoryeast.emonster.tools
• Egg timereggtimer.emonster.tools

Travel & vehicles9

• Airport & city code finderairports.emonster.tools
• Voyage costyachtvoyage.emonster.tools
• Yacht ownershipyachtcost.emonster.tools
• Supercar ownershipsupercarcost.emonster.tools
• Aircraft missionaircraftcost.emonster.tools
• Fuel consumption and trip costfuelcost.emonster.tools
• Flight elapsed timeflighttime.emonster.tools
• Tire size comparisontiresize.emonster.tools
• Road trip breaks and durationtripbreaks.emonster.tools

Business & selling13

• Car auctioncarauction.emonster.tools
• Watch auctionwatchauction.emonster.tools
• AI economicsaieconomics.emonster.tools
• Margin and markupmargin.emonster.tools
• Business break-evenbreakeven.emonster.tools
• Online selling profitsellingprofit.emonster.tools
• AdSense earnings calculatoradearnings.emonster.tools
• Depreciation scheduledepreciation.emonster.tools
• Inventory reorder pointreorderpoint.emonster.tools
• Shipping dimensional weightdimweight.emonster.tools
• Inventory turnover and daysinventoryturnover.emonster.tools
• Production capacity calculatorproductioncapacity.emonster.tools
• Downtime cost calculatordowntime.emonster.tools

Energy & water6

• Appliance electricity costappliancecost.emonster.tools
• EV charging time and costevcharging.emonster.tools
• Rainwater collectionrainwater.emonster.tools
• Shower water calculatorshowerwater.emonster.tools
• Solar panel calculatorsolarpanels.emonster.tools
• Water heating energy and timewaterheating.emonster.tools

Electronics9

• Resistor color code calculatorresistor.emonster.tools
• Battery runtimebattery.emonster.tools
• DC cable voltage dropvoltagedrop.emonster.tools
• 555 timer calculator555timer.emonster.tools
• Ohm’s law and LED resistorsohmslaw.emonster.tools
• Voltage divider calculatorvoltagedivider.emonster.tools
• Series and parallel componentsseriesparallel.emonster.tools
• RC charging and dischargingrctiming.emonster.tools
• Capacitor energy and chargecapacitorenergy.emonster.tools

3D printing6

• 3D-print layer and color-change plannerprintlayers.emonster.tools
• 3D-printing job costprintcost.emonster.tools
• Filament length and weightfilament.emonster.tools
• 3D printing volumetric flowprintflow.emonster.tools
• 3D print dimension correctionprintcorrection.emonster.tools
• 3D print build plate layoutbuildplate.emonster.tools

Mechanics & tools6

• Compound miter anglesmiter.emonster.tools
• Belt length and pulley centersbeltlength.emonster.tools
• Thermal expansion and fitthermalexpansion.emonster.tools
• Drill speed and feeddrillfeed.emonster.tools
• Torque wrench extension correctiontorqueextension.emonster.tools
• Pulley and gear ratiopulleyratio.emonster.tools

Photo, video & audio18

• Video file sizevideosize.emonster.tools
• Image print size and resolutionprintsize.emonster.tools
• Video frames to durationframetime.emonster.tools
• Shutter angle and exposure timeshutter.emonster.tools
• Uncompressed audio file sizeaudiosize.emonster.tools
• Speaker delay alignmentspeakerdelay.emonster.tools
• Room modes and acousticsroomacoustics.emonster.tools
• Photography depth of fielddof.emonster.tools
• Time-lapse plannertimelapse.emonster.tools
• Music tempo and delaytempodelay.emonster.tools
• ND-filter exposurendfilter.emonster.tools
• Screen viewing distance and angleviewingdistance.emonster.tools
• Color convertercolor.emonster.tools
• Image compressorcompress.emonster.tools
• Image converter and resizerresize.emonster.tools
• Dead pixel testpixels.emonster.tools
• Backlight bleed and uniformity testbacklight.emonster.tools
• Refresh rate and motion testrefresh.emonster.tools

Web & digital tools21

• Unix timestamp convertertimestamp.emonster.tools
• Data storage unitsdataunits.emonster.tools
• Download and transfer timedownloadtime.emonster.tools
• Screen pixel densityppi.emonster.tools
• WCAG color contrast checkercontrast.emonster.tools
• Lorem ipsum generatorlorem.emonster.tools
• Word and character counterwordcount.emonster.tools
• URL component encoder and decoderurlencode.emonster.tools
• Base64 text encoder and decoderbase64.emonster.tools
• JSON formatter and validatorjson.emonster.tools
• UUID v4 generatoruuid.emonster.tools
• QR code generatorqrcode.emonster.tools
• Barcode generatorbarcode.emonster.tools
• Favicon generatorfavicon.emonster.tools
• UTM campaign link builderutm.emonster.tools
• Uptime/SLA calculatoruptime.emonster.tools
• IP/CIDR calculatorcidr.emonster.tools
• Cron testercron.emonster.tools
• Password generatorpasswords.emonster.tools
• JWT decoderjwt.emonster.tools
• SHA-256 generatorsha256.emonster.tools

Science & space6

• Travel time: speed, sound and lighttraveltime.emonster.tools
• Relativistic travel and time dilationrelativity.emonster.tools
• Telescope eyepiece plannereyepieces.emonster.tools
• Weight and jumping on other worldsplanetweight.emonster.tools
• Dew point calculatordewpoint.emonster.tools
• Terminal velocity and falling objectsterminalvelocity.emonster.tools

Health & fitness9

• Running pacerunpace.emonster.tools
• Swimming pace and pool lengthsswimpace.emonster.tools
• Barbell plate loadingplateloader.emonster.tools
• Bicycle gearing and speedbikegears.emonster.tools
• Bicycle spoke lengthspokes.emonster.tools
• Adult BMI calculatorbmi.emonster.tools
• Sleep calculatorsleep.emonster.tools
• Eye test — Landolt Ceyetest.emonster.tools
• Walking distance and stepssteps.emonster.tools

Wheels & random pickers27

• Spin the wheel of nameswheel.emonster.tools
• Random pickerpicker.emonster.tools
• Yes or no wheelyesno.emonster.tools
• Random number pickerrandomnumber.emonster.tools
• Random letter wheelrandomletter.emonster.tools
• Random color wheelrandomcolor.emonster.tools
• Random team generatorrandomteams.emonster.tools
• Random date pickerrandomdate.emonster.tools
• Month of the year wheelrandommonth.emonster.tools
• Day of the week wheelrandomweekday.emonster.tools
• Random season wheelrandomseason.emonster.tools
• Generation picker wheelrandomgeneration.emonster.tools
• Random continent wheelrandomcontinent.emonster.tools
• Random country wheel with flagsrandomcountry.emonster.tools
• Solar system planet wheelrandomplanet.emonster.tools
• Fruit emoji spinnerrandomfruit.emonster.tools
• Airport code picker wheelrandomairport.emonster.tools
• Virtual dice rollerdice.emonster.tools
• NBA team picker wheelnbapicker.emonster.tools
• NFL team picker wheelnflpicker.emonster.tools
• MLB team picker wheelmlbpicker.emonster.tools
• World Cup team picker wheelworldcuppicker.emonster.tools
• Japanese baseball team wheelnpbpicker.emonster.tools
• Japanese J1 football team wheelj1picker.emonster.tools
• Japanese B.League team wheelbleaguepicker.emonster.tools
• Coin flip wheelcoinflip.emonster.tools
• Rock paper scissors wheelrockpaperscissors.emonster.tools

Fun & curiosities6

• Star Trek warp travel calculatorwarpspeed.emonster.tools
• Crossword generatorcrossword.emonster.tools
• Dice probabilitydiceodds.emonster.tools
• Birthday paradoxbirthdayodds.emonster.tools
• Paper-folding growthpaperfolding.emonster.tools
• Name to Egyptian hieroglyphshieroglyphs.emonster.tools