Online Tools HarborConverters
Unit converters (cm to inches, kg to lbs, °C to °F…), number bases, Roman numerals and numbers to words. 103 free tools, no sign-up.
Unit ConverterConvert length, weight, temperature, volume, area, speed, data size and time units instantly.Number Base ConverterConvert numbers between binary, octal, decimal, hexadecimal and any base 2–36.Roman Numeral ConverterConvert numbers to Roman numerals (2026 → MMXXVI) and back.Number to Words ConverterSpell out numbers in English words, including cheque/check format.Percentage CalculatorWork out X% of Y, what percent X is of Y, and percentage increase or decrease.Centimeters to Inches (cm to in)Convert centimeters to inches instantly, with the formula and a cm to in conversion table.Inches to Centimeters (in to cm)Convert inches to centimeters instantly, with the formula and a in to cm conversion table.Meters to Feet (m to ft)Convert meters to feet instantly, with the formula and a m to ft conversion table.Feet to Meters (ft to m)Convert feet to meters instantly, with the formula and a ft to m conversion table.Kilometers to Miles (km to mi)Convert kilometers to miles instantly, with the formula and a km to mi conversion table.Miles to Kilometers (mi to km)Convert miles to kilometers instantly, with the formula and a mi to km conversion table.Millimeters to Inches (mm to in)Convert millimeters to inches instantly, with the formula and a mm to in conversion table.Inches to Millimeters (in to mm)Convert inches to millimeters instantly, with the formula and a in to mm conversion table.Feet to Centimeters (ft to cm)Convert feet to centimeters instantly, with the formula and a ft to cm conversion table.Yards to Meters (yd to m)Convert yards to meters instantly, with the formula and a yd to m conversion table.Kilograms to Pounds (kg to lb)Convert kilograms to pounds instantly, with the formula and a kg to lb conversion table.Pounds to Kilograms (lb to kg)Convert pounds to kilograms instantly, with the formula and a lb to kg conversion table.Grams to Ounces (g to oz)Convert grams to ounces instantly, with the formula and a g to oz conversion table.Ounces to Grams (oz to g)Convert ounces to grams instantly, with the formula and a oz to g conversion table.Stone to Kilograms (st to kg)Convert stone to kilograms instantly, with the formula and a st to kg conversion table.Kilograms to Stone (kg to st)Convert kilograms to stone instantly, with the formula and a kg to st conversion table.Celsius to Fahrenheit (°C to °F)Convert degrees Celsius to degrees Fahrenheit instantly, with the formula and a °C to °F conversion table.Fahrenheit to Celsius (°F to °C)Convert degrees Fahrenheit to degrees Celsius instantly, with the formula and a °F to °C conversion table.Celsius to Kelvins (°C to K)Convert degrees Celsius to kelvins instantly, with the formula and a °C to K conversion table.Liters to US Gallons (L to gal)Convert liters to US gallons instantly, with the formula and a L to gal conversion table.US Gallons to Liters (gal to L)Convert US gallons to liters instantly, with the formula and a gal to L conversion table.Milliliters to US Fluid Ounces (mL to fl oz)Convert milliliters to US fluid ounces instantly, with the formula and a mL to fl oz conversion table.US Fluid Ounces to Milliliters (fl oz to mL)Convert US fluid ounces to milliliters instantly, with the formula and a fl oz to mL conversion table.US Cups to Milliliters (cup to mL)Convert US cups to milliliters instantly, with the formula and a cup to mL conversion table.Tablespoons to Milliliters (tbsp to mL)Convert tablespoons to milliliters instantly, with the formula and a tbsp to mL conversion table.Square Meters to Square Feet (m² to ft²)Convert square meters to square feet instantly, with the formula and a m² to ft² conversion table.Square Feet to Square Meters (ft² to m²)Convert square feet to square meters instantly, with the formula and a ft² to m² conversion table.Hectares to Acres (ha to ac)Convert hectares to acres instantly, with the formula and a ha to ac conversion table.Acres to Hectares (ac to ha)Convert acres to hectares instantly, with the formula and a ac to ha conversion table.Kilometers Per Hour to Miles Per Hour (km/h to mph)Convert kilometers per hour to miles per hour instantly, with the formula and a km/h to mph conversion table.Miles Per Hour to Kilometers Per Hour (mph to km/h)Convert miles per hour to kilometers per hour instantly, with the formula and a mph to km/h conversion table.Knots to Kilometers Per Hour (kn to km/h)Convert knots to kilometers per hour instantly, with the formula and a kn to km/h conversion table.Megabytes to Gigabytes (MB to GB)Convert megabytes to gigabytes instantly, with the formula and a MB to GB conversion table.Gigabytes to Megabytes (GB to MB)Convert gigabytes to megabytes instantly, with the formula and a GB to MB conversion table.Gigabytes to Terabytes (GB to TB)Convert gigabytes to terabytes instantly, with the formula and a GB to TB conversion table.Kilobytes to Megabytes (KB to MB)Convert kilobytes to megabytes instantly, with the formula and a KB to MB conversion table.Hours to Minutes (h to min)Convert hours to minutes instantly, with the formula and a h to min conversion table.Minutes to Hours (min to h)Convert minutes to hours instantly, with the formula and a min to h conversion table.Days to Hours (d to h)Convert days to hours instantly, with the formula and a d to h conversion table.Seconds to Minutes (s to min)Convert seconds to minutes instantly, with the formula and a s to min conversion table.Meters to Inches (m to in)Convert meters to inches instantly, with the formula and a m to in conversion table.Inches to Feet (in to ft)Convert inches to feet instantly, with the formula and a in to ft conversion table.Feet to Inches (ft to in)Convert feet to inches instantly, with the formula and a ft to in conversion table.Centimeters to Feet (cm to ft)Convert centimeters to feet instantly, with the formula and a cm to ft conversion table.Millimeters to Centimeters (mm to cm)Convert millimeters to centimeters instantly, with the formula and a mm to cm conversion table.Kilometers to Meters (km to m)Convert kilometers to meters instantly, with the formula and a km to m conversion table.Nautical Miles to Kilometers (nmi to km)Convert nautical miles to kilometers instantly, with the formula and a nmi to km conversion table.Miles to Feet (mi to ft)Convert miles to feet instantly, with the formula and a mi to ft conversion table.Yards to Feet (yd to ft)Convert yards to feet instantly, with the formula and a yd to ft conversion table.Meters to Yards (m to yd)Convert meters to yards instantly, with the formula and a m to yd conversion table.Grams to Pounds (g to lb)Convert grams to pounds instantly, with the formula and a g to lb conversion table.Pounds to Grams (lb to g)Convert pounds to grams instantly, with the formula and a lb to g conversion table.Milligrams to Grams (mg to g)Convert milligrams to grams instantly, with the formula and a mg to g conversion table.Kilograms to Grams (kg to g)Convert kilograms to grams instantly, with the formula and a kg to g conversion table.Ounces to Pounds (oz to lb)Convert ounces to pounds instantly, with the formula and a oz to lb conversion table.Pounds to Ounces (lb to oz)Convert pounds to ounces instantly, with the formula and a lb to oz conversion table.Kilograms to Ounces (kg to oz)Convert kilograms to ounces instantly, with the formula and a kg to oz conversion table.Ounces to Kilograms (oz to kg)Convert ounces to kilograms instantly, with the formula and a oz to kg conversion table.Pounds to Stone (lb to st)Convert pounds to stone instantly, with the formula and a lb to st conversion table.Stone to Pounds (st to lb)Convert stone to pounds instantly, with the formula and a st to lb conversion table.Metric Tons to Pounds (t to lb)Convert metric tons to pounds instantly, with the formula and a t to lb conversion table.Fahrenheit to Kelvins (°F to K)Convert degrees Fahrenheit to kelvins instantly, with the formula and a °F to K conversion table.Kelvins to Celsius (K to °C)Convert kelvins to degrees Celsius instantly, with the formula and a K to °C conversion table.Kelvins to Fahrenheit (K to °F)Convert kelvins to degrees Fahrenheit instantly, with the formula and a K to °F conversion table.Milliliters to Liters (mL to L)Convert milliliters to liters instantly, with the formula and a mL to L conversion table.Liters to Milliliters (L to mL)Convert liters to milliliters instantly, with the formula and a L to mL conversion table.Teaspoons to Milliliters (tsp to mL)Convert teaspoons to milliliters instantly, with the formula and a tsp to mL conversion table.Milliliters to Teaspoons (mL to tsp)Convert milliliters to teaspoons instantly, with the formula and a mL to tsp conversion table.Milliliters to US Cups (mL to cup)Convert milliliters to US cups instantly, with the formula and a mL to cup conversion table.Liters to US Cups (L to cup)Convert liters to US cups instantly, with the formula and a L to cup conversion table.US Gallons to US Fluid Ounces (gal to fl oz)Convert US gallons to US fluid ounces instantly, with the formula and a gal to fl oz conversion table.Imperial Gallons to Liters (imp gal to L)Convert imperial gallons to liters instantly, with the formula and a imp gal to L conversion table.Cubic Meters to Liters (m³ to L)Convert cubic meters to liters instantly, with the formula and a m³ to L conversion table.Liters to US Fluid Ounces (L to fl oz)Convert liters to US fluid ounces instantly, with the formula and a L to fl oz conversion table.Square Meters to Acres (m² to ac)Convert square meters to acres instantly, with the formula and a m² to ac conversion table.Acres to Square Feet (ac to ft²)Convert acres to square feet instantly, with the formula and a ac to ft² conversion table.Square Kilometers to Square Miles (km² to mi²)Convert square kilometers to square miles instantly, with the formula and a km² to mi² conversion table.Square Miles to Square Kilometers (mi² to km²)Convert square miles to square kilometers instantly, with the formula and a mi² to km² conversion table.Square Centimeters to Square Inches (cm² to in²)Convert square centimeters to square inches instantly, with the formula and a cm² to in² conversion table.Square Inches to Square Centimeters (in² to cm²)Convert square inches to square centimeters instantly, with the formula and a in² to cm² conversion table.Hectares to Square Meters (ha to m²)Convert hectares to square meters instantly, with the formula and a ha to m² conversion table.Meters Per Second to Kilometers Per Hour (m/s to km/h)Convert meters per second to kilometers per hour instantly, with the formula and a m/s to km/h conversion table.Kilometers Per Hour to Meters Per Second (km/h to m/s)Convert kilometers per hour to meters per second instantly, with the formula and a km/h to m/s conversion table.Miles Per Hour to Meters Per Second (mph to m/s)Convert miles per hour to meters per second instantly, with the formula and a mph to m/s conversion table.Kilometers Per Hour to Knots (km/h to kn)Convert kilometers per hour to knots instantly, with the formula and a km/h to kn conversion table.Terabytes to Gigabytes (TB to GB)Convert terabytes to gigabytes instantly, with the formula and a TB to GB conversion table.Megabytes to Kilobytes (MB to KB)Convert megabytes to kilobytes instantly, with the formula and a MB to KB conversion table.Gibibytes to Gigabytes (GiB to GB)Convert gibibytes to gigabytes instantly, with the formula and a GiB to GB conversion table.Gigabytes to Gibibytes (GB to GiB)Convert gigabytes to gibibytes instantly, with the formula and a GB to GiB conversion table.Megabytes to Mebibytes (MB to MiB)Convert megabytes to mebibytes instantly, with the formula and a MB to MiB conversion table.Bits to Bytes (bit to B)Convert bits to bytes instantly, with the formula and a bit to B conversion table.Hours to Seconds (h to s)Convert hours to seconds instantly, with the formula and a h to s conversion table.Days to Minutes (d to min)Convert days to minutes instantly, with the formula and a d to min conversion table.Weeks to Days (wk to d)Convert weeks to days instantly, with the formula and a wk to d conversion table.Years to Days (yr to d)Convert years to days instantly, with the formula and a yr to d conversion table.Minutes to Seconds (min to s)Convert minutes to seconds instantly, with the formula and a min to s conversion table.Hours to Days (h to d)Convert hours to days instantly, with the formula and a h to d conversion table.Days to Weeks (d to wk)Convert days to weeks instantly, with the formula and a d to wk conversion table.
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