Home / Unit Conversion Table Unit Conversion Table Handy conversion factors for length, weight, temperature, volume, area, speed, pressure, energy, data storage, time, and cooking. Exact values are marked — use the interactive converters for precision calculations.
Convert from Converts to Factor / Formula Note 1 inch centimeters × 2.54exact 1 centimeter inches × 0.39371 foot meters × 0.3048exact 1 meter feet × 3.28081 yard meters × 0.9144exact 1 meter yards × 1.09361 mile kilometers × 1.609341 kilometer miles × 0.621371 foot inches × 12exact 1 mile feet × 5,280exact 1 nautical mile kilometers × 1.852exact 1 light-year kilometers × 9.461 × 10¹²
Convert from Converts to Factor / Formula Note 1 pound (lb) kilograms × 0.45359exact: 0.45359237 1 kilogram pounds × 2.204621 ounce (oz) grams × 28.34951 gram ounces × 0.0352741 US ton (short ton) kilograms × 907.1851 metric ton (tonne) kilograms × 1,000exact 1 metric ton US tons × 1.102311 stone (UK) pounds × 14exact 1 kilogram grams × 1,000exact
Convert from Converts to Factor / Formula Note °F to °C Celsius (°F − 32) × 5/9°C to °F Fahrenheit (°C × 9/5) + 32°C to K Kelvin °C + 273.15K to °C Celsius K − 273.15°F to K Kelvin (°F − 32) × 5/9 + 273.15K to °F Fahrenheit (K − 273.15) × 9/5 + 32
Temperature Reference Points Reference Point Value Note Absolute zero −459.67 °F / −273.15 °C / 0 K Water freezes 32 °F / 0 °C / 273.15 K at 1 atm Room temperature 68–77 °F / 20–25 °C / 293–298 K Body temperature 98.6 °F / 37 °C / 310.15 K normal human Water boils 212 °F / 100 °C / 373.15 K at 1 atm Oven (moderate) 350 °F / 177 °C / 450 K Oven (hot) 450 °F / 232 °C / 505 K
Speed Convert from Converts to Factor / Formula Note 1 mph km/h × 1.609341 km/h mph × 0.621371 m/s km/h × 3.6exact 1 m/s mph × 2.236941 km/h m/s × 0.277781 mph m/s × 0.44704exact 1 knot km/h × 1.852exact 1 knot mph × 1.150781 knot m/s × 0.514441 mph feet/second × 1.46667Speed of sound (air) ≈ 343 m/s / 1,235 km/h / 767 mph at 20 °C Speed of light 299,792,458 m/s (exact) in vacuum
Volume & Capacity Convert from Converts to Factor / Formula Note 1 US gallon liters × 3.785411 liter US gallons × 0.264171 US cup milliliters × 236.5881 milliliter US cups × 0.0042271 fl oz (US) milliliters × 29.57351 US pint liters × 0.4731761 US quart liters × 0.9463531 liter milliliters × 1,000exact 1 cubic foot liters × 28.31681 cubic meter liters × 1,000exact 1 Imperial gallon liters × 4.54609exact
Area Convert from Converts to Factor / Formula Note 1 sq foot sq meters × 0.0929031 sq meter sq feet × 10.76391 sq yard sq meters × 0.8361271 acre sq meters × 4,046.861 acre sq feet × 43,560exact 1 hectare sq meters × 10,000exact 1 hectare acres × 2.471051 sq mile sq kilometers × 2.589991 sq mile acres × 640exact 1 sq kilometer hectares × 100exact
Pressure Convert from Converts to Factor / Formula Note 1 atm pascals (Pa) × 101,325exact 1 atm bar × 1.01325exact 1 atm psi × 14.69591 atm mmHg (torr) × 760exact 1 bar pascals (Pa) × 100,000exact 1 bar psi × 14.50381 psi pascals (Pa) × 6,894.761 psi bar × 0.0689481 psi atm × 0.0680461 mmHg (torr) pascals (Pa) × 133.3221 kPa pascals (Pa) × 1,000exact 1 MPa bar × 10exact
Energy Convert from Converts to Factor / Formula Note 1 kilocalorie (kcal) joules × 4,184exact 1 calorie (cal) joules × 4.184exact 1 joule (J) calories (cal) × 0.238851 joule (J) kilocalories × 0.000238851 kWh joules × 3,600,000exact 1 kWh kilocalories × 860.4211 BTU joules × 1,055.061 BTU kilocalories × 0.252001 BTU kWh × 0.000293071 watt-second joules × 1exact 1 electronvolt (eV) joules × 1.602 × 10⁻¹⁹1 therm (US) BTU × 100,000exact
Data Storage Convert from Converts to Factor / Formula Note 1 byte (B) bits × 8exact 1 kilobyte (KB) bytes × 1,000SI; exact 1 kibibyte (KiB) bytes × 1,024binary; exact 1 megabyte (MB) bytes × 1,000,000SI; exact 1 mebibyte (MiB) bytes × 1,048,576binary; exact 1 gigabyte (GB) bytes × 1,000,000,000SI; exact 1 gibibyte (GiB) bytes × 1,073,741,824binary; exact 1 terabyte (TB) gigabytes × 1,000SI; exact 1 tebibyte (TiB) gibibytes × 1,024binary; exact 1 GB MB × 1,000SI; exact 1 TB GB × 1,000SI; exact 1 petabyte (PB) terabytes × 1,000SI; exact
Time Convert from Converts to Factor / Formula Note 1 minute seconds × 60exact 1 hour seconds × 3,600exact 1 hour minutes × 60exact 1 day hours × 24exact 1 day seconds × 86,400exact 1 week days × 7exact 1 week hours × 168exact 1 year (calendar) days × 365non-leap 1 year (Julian) days × 365.25avg incl. leap 1 year seconds × 31,536,000non-leap year 1 month (avg) days × 30.4375Julian avg 1 decade years × 10exact 1 century years × 100exact 1 millisecond seconds × 0.001exact 1 microsecond seconds × 0.000001exact
Cooking Measurements Convert from Converts to Factor / Formula Note 1 US cup tablespoons × 16exact 1 tablespoon teaspoons × 3exact 1 US cup teaspoons × 48exact 1 US cup milliliters × 236.5881 tablespoon milliliters × 14.7871 teaspoon milliliters × 4.9291 fl oz tablespoons × 2exact 1 fl oz milliliters × 29.57351 liter US cups × 4.22681 liter tablespoons × 67.6281 US pint cups × 2exact 1 US quart cups × 4exact 1 US gallon cups × 16exact 1 Imperial cup milliliters × 284.1311 metric cup milliliters × 250exact (AU/NZ/CA)
How to use this table To convert, multiply the value you have by the factor shown. For example, to convert 5 miles to kilometers: 5 × 1.60934 = 8.047 km. Temperature conversions use the formula in the Factor column instead of a multiplier. Data storage SI prefixes are powers of 1,000; binary (KiB, MiB, GiB…) are powers of 1,024. Values marked exact are defined exactly by international standards — all others are rounded to 5–6 significant figures.
Need a precise conversion? Our interactive unit converters handle any value instantly and show you every step.
