Josh Liljenquist

Authoritative browser-local utilities

Convert temperature, length, speed, and race distance.

Use one canonical tool for each clear conversion direction. Enter any supported value instead of searching through thin exact-number pages.

Knots to MPH Converter

Convert knots (kn) to miles per hour (mph) with an authoritative browser-local formula and common values.

KPH to MPH Converter

Convert kilometers per hour (km/h) to miles per hour (mph) with an authoritative browser-local formula and common values.

5K to Miles Converter

Convert the standard 5K race distance to exact and practical mile values, with kilometer marker references.

Weight, length, mass, and volume

KG to LBS Converter

Convert kilograms to avoirdupois pounds or pounds to kilograms using the exact international definition.

Liters to Gallons Converter

Convert liters to U.S. liquid or Imperial gallons, and reverse the conversion, with explicit gallon selection.

Cooking volume and everyday length

CM to Feet Converter

Convert centimeters to decimal feet and feet plus inches, or convert feet to centimeters.

Feet to Miles Converter

Convert international feet to statute miles, or statute miles to feet, using the exact relationship.

Everyday volume, metric length, and mass

Gallons to Quarts Converter

Convert U.S. liquid gallons to U.S. liquid quarts, or quarts to gallons, using the exact 4-to-1 relationship.

MM to CM Converter

Convert millimeters to centimeters, or centimeters to millimeters, using the exact metric relationship.

Volume, area, and temperature conversions

ML to OZ Converter

Convert milliliters to U.S. fluid ounces, or U.S. fluid ounces to milliliters, using the exact U.S. liquid-volume relationship.

Square Feet to Acres Converter

Convert an already-known area from square feet to acres, or acres to square feet, using the exact 43,560-to-1 relationship.

Quarts to Cups Converter

Convert U.S. liquid quarts to U.S. customary cups, or cups to quarts, with exact decimal and useful kitchen-fraction results.

Kelvin to Celsius Converter

Convert thermodynamic temperature from kelvin to degrees Celsius, or Celsius to kelvin, with explicit absolute-zero validation.

Volume and length conversions

Cups to Gallons Converter

Convert U.S. customary cups to U.S. liquid gallons, or gallons to cups, using the exact 16-to-1 relationship.

Feet to Yards Converter

Convert international feet to international yards, or yards to feet, using the exact three-feet-per-yard relationship.

Meters to Yards Converter

Convert meters to international yards, or yards to meters, using the exact 0.9144-meter international-yard definition.

Yards to Miles Converter

Convert international yards to statute miles, or miles to yards, using the exact 1,760-yards-per-mile relationship.

Mass, volume, and land-area conversions

Grams to Pounds Converter

Convert grams to international avoirdupois pounds, or pounds to grams, using the exact 453.59237-gram definition.

Cups to Pints Converter

Convert U.S. customary cups to U.S. liquid pints, or pints to cups, using the exact two-cups-per-pint relationship.

Hectares to Acres Converter

Convert land area from hectares to international acres, or acres to hectares, using exact metric and international area definitions.

Kilograms to Ounces Converter

Convert kilograms to international avoirdupois ounces, or ounces to kilograms, using the exact 28.349523125-gram ounce.

Metric mass, area, and U.S. liquid-volume conversions

Grams to Kilograms Converter

Convert grams to kilograms, or kilograms to grams, using the exact 1,000-grams-per-kilogram metric relationship.

Pints to Gallons Converter

Convert U.S. liquid pints to U.S. liquid gallons, or gallons to pints, using the exact eight-pints-per-gallon relationship.

Pints to Quarts Converter

Convert U.S. liquid pints to U.S. liquid quarts, or quarts to pints, using the exact two-pints-per-quart relationship.

Volume, metric length, and metric mass conversions

Liters to Cups Converter

Convert liters to U.S. customary cups, or U.S. cups to liters, using the exact U.S. liquid-volume relationship.

Navigation distance, area, volume, and metric length

Nautical Miles to Miles Converter

Convert international nautical miles to international statute miles, or statute miles to nautical miles, from their exact meter definitions.