Convert & Calculate
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Fast, transparent calculators for daily life, engineering, data, dates and math. Every result includes the formula.

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Popular:°C ↔ °Fkg ↔ lb%
TOOL DIRECTORY

Browse by category

91 tools across 11 categories

Length & distance

8 tools
01Meters to Feetm ↔ ft02Centimeters to Inchescm ↔ in03Kilometers to Mileskm ↔ mi04Millimeters to Inchesmm ↔ in05Meters to Yardsm ↔ yd06Nautical Miles to Kilometersnmi ↔ km07Micrometers, Nanometers & Millimetersµm · nm · mm08Light-years, Astronomical Units & Kilometersly · AU · km

Area

7 tools
09Square Meters to Square Feetm² ↔ ft²10Square Meters to Square Yardsm² ↔ yd²11Hectares to Acresha ↔ ac12Square Kilometers to Square Mileskm² ↔ mi²13Ping to Square Metersping ↔ m²14Mu to Square Metersmu ↔ m²15Square Inches to Square Centimetersin² ↔ cm²

Weight & mass

6 tools
16Kilograms to Poundskg ↔ lb17Grams to Ouncesg ↔ oz18Tonnes, Short Tons & Long Tonst · US ton · UK ton19Carats to Gramsct ↔ g20Milligrams to Microgramsmg ↔ µg21Stone to Kilogramsst ↔ kg

Temperature

4 tools
22Celsius to Fahrenheit°C ↔ °F23Celsius to Kelvin°C ↔ K24Fahrenheit to Kelvin°F ↔ K25Oven Temperature Converter°C · °F · gas mark

Capacity & volume

7 tools
26Liters to GallonsL ↔ US gal27Milliliters to Fluid OuncesmL ↔ US fl oz28Cups to Milliliterscup ↔ mL29Tablespoons, Teaspoons & Milliliterstbsp · tsp · mL30Cubic Meters to Cubic Feetm³ ↔ ft³31Cubic Centimeters to Cubic Inchescm³ ↔ in³32US Gallons to Imperial GallonsUS gal ↔ Imp gal

Speed, pace & fuel

6 tools
33Kilometers per Hour to Miles per Hourkm/h ↔ mph34Meters per Second to Kilometers per Hourm/s ↔ km/h35Knots to Kilometers per Hourkn ↔ km/h36Pace to Speed Convertermin/km · min/mi · km/h37MPG to L/100kmmpg ↔ L/100 km38Fuel Cost per 100 kmconsumption × price

Pressure, energy & power

9 tools
39PSI to Barpsi ↔ bar40Kilopascals to PSIkPa ↔ psi41Pa, kPa & MPaPa · kPa · MPa42Joules to CaloriesJ ↔ cal43Kilocalories to Kilojouleskcal ↔ kJ44Watts to HorsepowerW ↔ hp45Kilowatts to BTU per HourkW ↔ BTU/h46Kilowatt-hours to JouleskWh ↔ J47Newton-meters to Pound-feetN·m ↔ lb-ft

Data & network

6 tools
48Byte, KB, MB, GB & TBB · KB · MB · GB · TB49MB, MiB, GB & GiBdecimal ↔ binary50Mbps to MB/sMbps ↔ MB/s51Download Time Calculatorsize ÷ speed52Image Pixels & File Size Estimatorpixels × depth53Video Bitrate & File Sizebitrate × duration

Time & date

8 tools
54Seconds, Minutes, Hours & Dayss · min · h · d55Weeks, Months & Yearswk · mo · yr56Time Zone ConverterIANA time zones57UTC to Local TimeUTC ↔ local5812-hour to 24-hour TimeAM/PM ↔ 24 h59Days Between Datesdate difference60Business Days Calculatorweekdays61Add or Subtract Daysdate ± days

Currency & international

10 tools
62Live Currency Converterlive mid-market rates63Historical Currency Converterhistorical rates64Multi-currency Price Comparisoncompare prices65Currency Converter with Feesrate + fee66Cross-border Exchange Costtotal landed FX cost67International Shoe SizeUS · UK · EU · JP68International Clothing SizeUS · UK · EU · JP69Ring Size ConverterUS · UK · EU · mm70Paper Size ConverterISO · US paper71Screen Size & Dimensionsdiagonal · ratio

Math & engineering calculators

20 tools
72Percentage Calculatorpercent of a number73Percentage Change Calculatorincrease or decrease74Ratio Calculatorsimplify & scale75Mean, Median & Modedescriptive statistics76Standard Deviation Calculatorpopulation & sample77Fraction Calculatorfraction arithmetic78Scientific Calculatorscientific functions79Quadratic Equation Calculatorax² + bx + c = 080Permutations & CombinationsnPr · nCr81Probability Calculatorevents & complements82Circle, Triangle & Rectangle Area2D geometry83Cylinder, Sphere & Cone Volume3D geometry84Slope & Distance Between Two Pointscoordinate geometry85Ohm's Law CalculatorV = I × R86Electrical Power CalculatorP = V × I87Resistor Color Code Calculator4-band resistor88LED Resistor Calculatorcurrent limiting resistor89Screen PPI Calculatorpixel density90Aspect Ratio Calculatorwidth : height91CSS clamp() Font Size Calculatorresponsive type