Free Online Calculator Tools

Simple, fast, and accurate conversions and calculations for your projects.

🔨 DIY & Home Improvement Calculators

Plan your next project with our specialized DIY calculators. Get accurate material estimates for landscaping, construction, and home improvement.

Asphalt Calculator

Free asphalt calculator to determine how much asphalt you need for your driveway, parking lot, or road project. Calculate tons and cubic yards needed based on your area dimensions.

Gravel Calculator

Free gravel calculator to determine how much gravel you need for your driveway, path, or landscaping project. Calculate cubic yards needed based on your area dimensions.

Mulch Calculator

Free mulch calculator to determine how much mulch you need for your garden or landscaping project. Calculate cubic yards and bags needed based on your area dimensions.

Rock Calculator

Free rock calculator to determine how much landscaping rock or stone you need for your project. Calculate cubic yards and tons needed for river rock, decorative stone, and more.

Sand Calculator

Free sand calculator to determine how much sand you need for your sandbox, patio base, or construction project. Calculate cubic yards and tons needed based on your area dimensions.

Topsoil Calculator

Free topsoil calculator to determine how much topsoil you need for your garden, lawn, or landscaping project. Calculate cubic yards needed based on your area dimensions.

Area

Area Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Acre	Hectare	Square Centimeter	Square Foot	Square Inch	Square Kilometer	Square Meter	Square Mile	Square Millimeter	Square Yard
Acre	—	Acre to Hectare	Acre to Square Centimeter	Acre to Square Foot	Acre to Square Inch	Acre to Square Kilometer	Acre to Square Meter	Acre to Square Mile	Acre to Square Millimeter	Acre to Square Yard
Hectare	Hectare to Acre	—	Hectare to Square Centimeter	Hectare to Square Foot	Hectare to Square Inch	Hectare to Square Kilometer	Hectare to Square Meter	Hectare to Square Mile	Hectare to Square Millimeter	Hectare to Square Yard
Square Centimeter	Square Centimeter to Acre	Square Centimeter to Hectare	—	Square Centimeter to Square Foot	Square Centimeter to Square Inch	Square Centimeter to Square Kilometer	Square Centimeter to Square Meter	Square Centimeter to Square Mile	Square Centimeter to Square Millimeter	Square Centimeter to Square Yard
Square Foot	Square Foot to Acre	Square Foot to Hectare	Square Foot to Square Centimeter	—	Square Foot to Square Inch	Square Foot to Square Kilometer	Square Foot to Square Meter	Square Foot to Square Mile	Square Foot to Square Millimeter	Square Foot to Square Yard
Square Inch	Square Inch to Acre	Square Inch to Hectare	Square Inch to Square Centimeter	Square Inch to Square Foot	—	Square Inch to Square Kilometer	Square Inch to Square Meter	Square Inch to Square Mile	Square Inch to Square Millimeter	Square Inch to Square Yard
Square Kilometer	Square Kilometer to Acre	Square Kilometer to Hectare	Square Kilometer to Square Centimeter	Square Kilometer to Square Foot	Square Kilometer to Square Inch	—	Square Kilometer to Square Meter	Square Kilometer to Square Mile	Square Kilometer to Square Millimeter	Square Kilometer to Square Yard
Square Meter	Square Meter to Acre	Square Meter to Hectare	Square Meter to Square Centimeter	Square Meter to Square Foot	Square Meter to Square Inch	Square Meter to Square Kilometer	—	Square Meter to Square Mile	Square Meter to Square Millimeter	Square Meter to Square Yard
Square Mile	Square Mile to Acre	Square Mile to Hectare	Square Mile to Square Centimeter	Square Mile to Square Foot	Square Mile to Square Inch	Square Mile to Square Kilometer	Square Mile to Square Meter	—	Square Mile to Square Millimeter	Square Mile to Square Yard
Square Millimeter	Square Millimeter to Acre	Square Millimeter to Hectare	Square Millimeter to Square Centimeter	Square Millimeter to Square Foot	Square Millimeter to Square Inch	Square Millimeter to Square Kilometer	Square Millimeter to Square Meter	Square Millimeter to Square Mile	—	Square Millimeter to Square Yard
Square Yard	Square Yard to Acre	Square Yard to Hectare	Square Yard to Square Centimeter	Square Yard to Square Foot	Square Yard to Square Inch	Square Yard to Square Kilometer	Square Yard to Square Meter	Square Yard to Square Mile	Square Yard to Square Millimeter	—

Digital-Storage

Digital-Storage Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Bit	Byte	Gigabyte	Kilobyte	Megabyte	Petabyte	Terabyte
Bit	—	Bit to Byte	Bit to Gigabyte	Bit to Kilobyte	Bit to Megabyte	Bit to Petabyte	Bit to Terabyte
Byte	Byte to Bit	—	Byte to Gigabyte	Byte to Kilobyte	Byte to Megabyte	Byte to Petabyte	Byte to Terabyte
Gigabyte	Gigabyte to Bit	Gigabyte to Byte	—	Gigabyte to Kilobyte	Gigabyte to Megabyte	Gigabyte to Petabyte	Gigabyte to Terabyte
Kilobyte	Kilobyte to Bit	Kilobyte to Byte	Kilobyte to Gigabyte	—	Kilobyte to Megabyte	Kilobyte to Petabyte	Kilobyte to Terabyte
Megabyte	Megabyte to Bit	Megabyte to Byte	Megabyte to Gigabyte	Megabyte to Kilobyte	—	Megabyte to Petabyte	Megabyte to Terabyte
Petabyte	Petabyte to Bit	Petabyte to Byte	Petabyte to Gigabyte	Petabyte to Kilobyte	Petabyte to Megabyte	—	Petabyte to Terabyte
Terabyte	Terabyte to Bit	Terabyte to Byte	Terabyte to Gigabyte	Terabyte to Kilobyte	Terabyte to Megabyte	Terabyte to Petabyte	—

Distance

Distance Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Centimeter	Foot	Inch	Kilometer	Meter	Mile	Millimeter	Yard
Centimeter	—	Centimeter to Foot	Centimeter to Inch	Centimeter to Kilometer	Centimeter to Meter	Centimeter to Mile	Centimeter to Millimeter	Centimeter to Yard
Foot	Foot to Centimeter	—	Foot to Inch	Foot to Kilometer	Foot to Meter	Foot to Mile	Foot to Millimeter	Foot to Yard
Inch	Inch to Centimeter	Inch to Foot	—	Inch to Kilometer	Inch to Meter	Inch to Mile	Inch to Millimeter	Inch to Yard
Kilometer	Kilometer to Centimeter	Kilometer to Foot	Kilometer to Inch	—	Kilometer to Meter	Kilometer to Mile	Kilometer to Millimeter	Kilometer to Yard
Meter	Meter to Centimeter	Meter to Foot	Meter to Inch	Meter to Kilometer	—	Meter to Mile	Meter to Millimeter	Meter to Yard
Mile	Mile to Centimeter	Mile to Foot	Mile to Inch	Mile to Kilometer	Mile to Meter	—	Mile to Millimeter	Mile to Yard
Millimeter	Millimeter to Centimeter	Millimeter to Foot	Millimeter to Inch	Millimeter to Kilometer	Millimeter to Meter	Millimeter to Mile	—	Millimeter to Yard
Yard	Yard to Centimeter	Yard to Foot	Yard to Inch	Yard to Kilometer	Yard to Meter	Yard to Mile	Yard to Millimeter	—

Energy

Energy Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	British Thermal Unit	Calorie	Foot Pound	Joule	Kilocalorie	Kilojoule	Kilowatt Hour	Watt Hour
British Thermal Unit	—	British Thermal Unit to Calorie	British Thermal Unit to Foot Pound	British Thermal Unit to Joule	British Thermal Unit to Kilocalorie	British Thermal Unit to Kilojoule	British Thermal Unit to Kilowatt Hour	British Thermal Unit to Watt Hour
Calorie	Calorie to British Thermal Unit	—	Calorie to Foot Pound	Calorie to Joule	Calorie to Kilocalorie	Calorie to Kilojoule	Calorie to Kilowatt Hour	Calorie to Watt Hour
Foot Pound	Foot Pound to British Thermal Unit	Foot Pound to Calorie	—	Foot Pound to Joule	Foot Pound to Kilocalorie	Foot Pound to Kilojoule	Foot Pound to Kilowatt Hour	Foot Pound to Watt Hour
Joule	Joule to British Thermal Unit	Joule to Calorie	Joule to Foot Pound	—	Joule to Kilocalorie	Joule to Kilojoule	Joule to Kilowatt Hour	Joule to Watt Hour
Kilocalorie	Kilocalorie to British Thermal Unit	Kilocalorie to Calorie	Kilocalorie to Foot Pound	Kilocalorie to Joule	—	Kilocalorie to Kilojoule	Kilocalorie to Kilowatt Hour	Kilocalorie to Watt Hour
Kilojoule	Kilojoule to British Thermal Unit	Kilojoule to Calorie	Kilojoule to Foot Pound	Kilojoule to Joule	Kilojoule to Kilocalorie	—	Kilojoule to Kilowatt Hour	Kilojoule to Watt Hour
Kilowatt Hour	Kilowatt Hour to British Thermal Unit	Kilowatt Hour to Calorie	Kilowatt Hour to Foot Pound	Kilowatt Hour to Joule	Kilowatt Hour to Kilocalorie	Kilowatt Hour to Kilojoule	—	Kilowatt Hour to Watt Hour
Watt Hour	Watt Hour to British Thermal Unit	Watt Hour to Calorie	Watt Hour to Foot Pound	Watt Hour to Joule	Watt Hour to Kilocalorie	Watt Hour to Kilojoule	Watt Hour to Kilowatt Hour	—

Fuel-Economy

Fuel-Economy Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Kilometer Per Liter	Mile Per Gallon	Mile Per Liter
Kilometer Per Liter	—	Kilometer Per Liter to Mile Per Gallon	Kilometer Per Liter to Mile Per Liter
Mile Per Gallon	Mile Per Gallon to Kilometer Per Liter	—	Mile Per Gallon to Mile Per Liter
Mile Per Liter	Mile Per Liter to Kilometer Per Liter	Mile Per Liter to Mile Per Gallon	—

Power

Power Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Btu Per Hour	Horsepower	Kilowatt	Megawatt	Metric Horsepower	Watt
Btu Per Hour	—	Btu Per Hour to Horsepower	Btu Per Hour to Kilowatt	Btu Per Hour to Megawatt	Btu Per Hour to Metric Horsepower	Btu Per Hour to Watt
Horsepower	Horsepower to Btu Per Hour	—	Horsepower to Kilowatt	Horsepower to Megawatt	Horsepower to Metric Horsepower	Horsepower to Watt
Kilowatt	Kilowatt to Btu Per Hour	Kilowatt to Horsepower	—	Kilowatt to Megawatt	Kilowatt to Metric Horsepower	Kilowatt to Watt
Megawatt	Megawatt to Btu Per Hour	Megawatt to Horsepower	Megawatt to Kilowatt	—	Megawatt to Metric Horsepower	Megawatt to Watt
Metric Horsepower	Metric Horsepower to Btu Per Hour	Metric Horsepower to Horsepower	Metric Horsepower to Kilowatt	Metric Horsepower to Megawatt	—	Metric Horsepower to Watt
Watt	Watt to Btu Per Hour	Watt to Horsepower	Watt to Kilowatt	Watt to Megawatt	Watt to Metric Horsepower	—

Pressure

Pressure Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Atmosphere	Bar	Kilopascal	Millimeter Of Mercury	Pascal	Psi	Torr
Atmosphere	—	Atmosphere to Bar	Atmosphere to Kilopascal	Atmosphere to Millimeter Of Mercury	Atmosphere to Pascal	Atmosphere to Psi	Atmosphere to Torr
Bar	Bar to Atmosphere	—	Bar to Kilopascal	Bar to Millimeter Of Mercury	Bar to Pascal	Bar to Psi	Bar to Torr
Kilopascal	Kilopascal to Atmosphere	Kilopascal to Bar	—	Kilopascal to Millimeter Of Mercury	Kilopascal to Pascal	Kilopascal to Psi	Kilopascal to Torr
Millimeter Of Mercury	Millimeter Of Mercury to Atmosphere	Millimeter Of Mercury to Bar	Millimeter Of Mercury to Kilopascal	—	Millimeter Of Mercury to Pascal	Millimeter Of Mercury to Psi	Millimeter Of Mercury to Torr
Pascal	Pascal to Atmosphere	Pascal to Bar	Pascal to Kilopascal	Pascal to Millimeter Of Mercury	—	Pascal to Psi	Pascal to Torr
Psi	Psi to Atmosphere	Psi to Bar	Psi to Kilopascal	Psi to Millimeter Of Mercury	Psi to Pascal	—	Psi to Torr
Torr	Torr to Atmosphere	Torr to Bar	Torr to Kilopascal	Torr to Millimeter Of Mercury	Torr to Pascal	Torr to Psi	—

Time

Time Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Century	Day	Decade	Hour	Millennium	Millisecond	Minute	Second	Week	Year
Century	—	Century to Day	Century to Decade	Century to Hour	Century to Millennium	Century to Millisecond	Century to Minute	Century to Second	Century to Week	Century to Year
Day	Day to Century	—	Day to Decade	Day to Hour	Day to Millennium	Day to Millisecond	Day to Minute	Day to Second	Day to Week	Day to Year
Decade	Decade to Century	Decade to Day	—	Decade to Hour	Decade to Millennium	Decade to Millisecond	Decade to Minute	Decade to Second	Decade to Week	Decade to Year
Hour	Hour to Century	Hour to Day	Hour to Decade	—	Hour to Millennium	Hour to Millisecond	Hour to Minute	Hour to Second	Hour to Week	Hour to Year
Millennium	Millennium to Century	Millennium to Day	Millennium to Decade	Millennium to Hour	—	Millennium to Millisecond	Millennium to Minute	Millennium to Second	Millennium to Week	Millennium to Year
Millisecond	Millisecond to Century	Millisecond to Day	Millisecond to Decade	Millisecond to Hour	Millisecond to Millennium	—	Millisecond to Minute	Millisecond to Second	Millisecond to Week	Millisecond to Year
Minute	Minute to Century	Minute to Day	Minute to Decade	Minute to Hour	Minute to Millennium	Minute to Millisecond	—	Minute to Second	Minute to Week	Minute to Year
Second	Second to Century	Second to Day	Second to Decade	Second to Hour	Second to Millennium	Second to Millisecond	Second to Minute	—	Second to Week	Second to Year
Week	Week to Century	Week to Day	Week to Decade	Week to Hour	Week to Millennium	Week to Millisecond	Week to Minute	Week to Second	—	Week to Year
Year	Year to Century	Year to Day	Year to Decade	Year to Hour	Year to Millennium	Year to Millisecond	Year to Minute	Year to Second	Year to Week	—

Velocity

Velocity Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Foot Per Second	Kilometer Per Hour	Knot	Mach	Meter Per Second	Mile Per Hour
Foot Per Second	—	Foot Per Second to Kilometer Per Hour	Foot Per Second to Knot	Foot Per Second to Mach	Foot Per Second to Meter Per Second	Foot Per Second to Mile Per Hour
Kilometer Per Hour	Kilometer Per Hour to Foot Per Second	—	Kilometer Per Hour to Knot	Kilometer Per Hour to Mach	Kilometer Per Hour to Meter Per Second	Kilometer Per Hour to Mile Per Hour
Knot	Knot to Foot Per Second	Knot to Kilometer Per Hour	—	Knot to Mach	Knot to Meter Per Second	Knot to Mile Per Hour
Mach	Mach to Foot Per Second	Mach to Kilometer Per Hour	Mach to Knot	—	Mach to Meter Per Second	Mach to Mile Per Hour
Meter Per Second	Meter Per Second to Foot Per Second	Meter Per Second to Kilometer Per Hour	Meter Per Second to Knot	Meter Per Second to Mach	—	Meter Per Second to Mile Per Hour
Mile Per Hour	Mile Per Hour to Foot Per Second	Mile Per Hour to Kilometer Per Hour	Mile Per Hour to Knot	Mile Per Hour to Mach	Mile Per Hour to Meter Per Second	—

Volume

Volume Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Cup	Fluid Ounce	Gallon	Liter	Milliliter	Pint	Quart
Cup	—	Cup to Fluid Ounce	Cup to Gallon	Cup to Liter	Cup to Milliliter	Cup to Pint	Cup to Quart
Fluid Ounce	Fluid Ounce to Cup	—	Fluid Ounce to Gallon	Fluid Ounce to Liter	Fluid Ounce to Milliliter	Fluid Ounce to Pint	Fluid Ounce to Quart
Gallon	Gallon to Cup	Gallon to Fluid Ounce	—	Gallon to Liter	Gallon to Milliliter	Gallon to Pint	Gallon to Quart
Liter	Liter to Cup	Liter to Fluid Ounce	Liter to Gallon	—	Liter to Milliliter	Liter to Pint	Liter to Quart
Milliliter	Milliliter to Cup	Milliliter to Fluid Ounce	Milliliter to Gallon	Milliliter to Liter	—	Milliliter to Pint	Milliliter to Quart
Pint	Pint to Cup	Pint to Fluid Ounce	Pint to Gallon	Pint to Liter	Pint to Milliliter	—	Pint to Quart
Quart	Quart to Cup	Quart to Fluid Ounce	Quart to Gallon	Quart to Liter	Quart to Milliliter	Quart to Pint	—

Weight

Weight Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To	Gram	Kilogram	Metric Ton	Milligram	Ounce	Pound	Ton
Gram	—	Gram to Kilogram	Gram to Metric Ton	Gram to Milligram	Gram to Ounce	Gram to Pound	Gram to Ton
Kilogram	Kilogram to Gram	—	Kilogram to Metric Ton	Kilogram to Milligram	Kilogram to Ounce	Kilogram to Pound	Kilogram to Ton
Metric Ton	Metric Ton to Gram	Metric Ton to Kilogram	—	Metric Ton to Milligram	Metric Ton to Ounce	Metric Ton to Pound	Metric Ton to Ton
Milligram	Milligram to Gram	Milligram to Kilogram	Milligram to Metric Ton	—	Milligram to Ounce	Milligram to Pound	Milligram to Ton
Ounce	Ounce to Gram	Ounce to Kilogram	Ounce to Metric Ton	Ounce to Milligram	—	Ounce to Pound	Ounce to Ton
Pound	Pound to Gram	Pound to Kilogram	Pound to Metric Ton	Pound to Milligram	Pound to Ounce	—	Pound to Ton
Ton	Ton to Gram	Ton to Kilogram	Ton to Metric Ton	Ton to Milligram	Ton to Ounce	Ton to Pound	—

About Our Calculators

Our free online calculators are designed to be simple, accurate, and easy to use. We believe that useful tools should be accessible to everyone without the need for signups, subscriptions, or dealing with annoying ads.

Our unit conversion calculators provide instant and accurate conversions between different measurement units. Whether you're working on a project, studying, or just need to convert units for everyday use, our calculators make it easy.