Free Unit Converters

Convert Celsius to Fahrenheit (and Fahrenheit to Celsius or Kelvin) instantly, with the formula worked out, a quick mental-math trick and a reference chart.

Convert kg to lbs and lbs to kg instantly with the exact factor (1 lb = 0.45359237 kg), plus the answer in pounds and ounces and in stone, with the math shown.

Convert inches to cm and cm to inches with the exact 2.54 factor, plus height in feet and inches to cm (5 ft 7 in = 170.18 cm), with a chart and the math shown.

Convert cm to feet and inches instantly: 170 cm is 5 ft 6.9 in, 180 cm is 5 ft 10.9 in. Exact 2.54 factor, a height chart from 140 to 210 cm and the steps.

Convert miles to km and km to miles with the exact 1.609344 factor, see how far a 5K, 10K or marathon is in miles, and convert running pace per mile and per km.

Convert millimeters to inches (mm to in) instantly: 10 millimeters is 0.393701 inches and 25 millimeters is 0.984252 inches. Exact factor, chart and steps.

Convert inches to millimeters (in to mm) instantly: 0.5 inches is 12.7 millimeters and 2 inches is 50.8 millimeters. Exact factor, chart and steps.

Convert inches to feet (in to ft) instantly: 30 inches is 2.5 feet and 66 inches is 5.5 feet. Exact factor, chart and steps.

Convert feet to inches (ft to in) instantly: 3 feet is 36 inches and 5.5 feet is 66 inches. Exact factor, chart and steps.

Convert meters to feet (m to ft) instantly: 1.8 meters is 5.90551 feet and 5 meters is 16.4042 feet. Exact factor, chart and steps.

Convert feet to meters (ft to m) instantly: 6 feet is 1.8288 meters and 30 feet is 9.144 meters. Exact factor, chart and steps.

Convert feet to centimeters (ft to cm) instantly: 3 feet is 91.44 centimeters and 5.5 feet is 167.64 centimeters. Exact factor, chart and steps.

Convert centimeters to millimeters (cm to mm) instantly: 0.5 centimeters is 5 millimeters and 2.5 centimeters is 25 millimeters. Exact factor, chart and steps.

Convert meters to yards (m to yd) instantly: 10 meters is 10.9361 yards and 100 meters is 109.361 yards. Exact factor, chart and steps.

Convert yards to meters (yd to m) instantly: 5 yards is 4.572 meters and 100 yards is 91.44 meters. Exact factor, chart and steps.

Convert inches to meters (in to m) instantly: 36 inches is 0.9144 meters and 60 inches is 1.524 meters. Exact factor, chart and steps.

Convert meters to inches (m to in) instantly: 0.5 meters is 19.685 inches and 1.5 meters is 59.0551 inches. Exact factor, chart and steps.

Convert miles to feet (mi to ft) instantly: 0.25 miles is 1,320 feet and 1 mile is 5,280 feet. Exact factor, chart and steps.

Convert feet to miles (ft to mi) instantly: 1,000 feet is 0.189394 miles and 10,000 feet is 1.89394 miles. Exact factor, chart and steps.

Convert kilometers to feet (km to ft) instantly: 1 kilometer is 3,280.84 feet and 3 kilometers is 9,842.52 feet. Exact factor, chart and steps.

Convert milliliters to fluid ounces (ml to fl oz) instantly: 100 milliliters is 3.3814 fluid ounces and 330 milliliters is 11.1586 fluid ounces. Exact factor, chart and steps.

Convert fluid ounces to milliliters (fl oz to ml) instantly: 2 fluid ounces is 59.1471 milliliters and 8 fluid ounces is 236.588 milliliters. Exact factor, chart and steps.

Convert liters to gallons (L to gal) instantly: 4 liters is 1.05669 gallons and 20 liters is 5.28344 gallons. Exact factor, chart and steps.

Convert gallons to liters (gal to L) instantly: 1 gallon is 3.78541 liters and 5 gallons is 18.9271 liters. Exact factor, chart and steps.

Convert liters to quarts (L to qt) instantly: 1 liter is 1.05669 quarts and 4 liters is 4.22675 quarts. Exact factor, chart and steps.

Convert quarts to liters (qt to L) instantly: 1 quart is 0.946353 liters and 4 quarts is 3.78541 liters. Exact factor, chart and steps.

Convert gallons to quarts (gal to qt) instantly: 0.5 gallons is 2 quarts and 2 gallons is 8 quarts. Exact factor, chart and steps.

Convert fluid ounces to cups (fl oz to cup) instantly: 4 fluid ounces is 0.5 cups and 12 fluid ounces is 1.5 cups. Exact factor, chart and steps.

Convert cups to fluid ounces (cup to fl oz) instantly: 0.75 cups is 6 fluid ounces and 2 cups is 16 fluid ounces. Exact factor, chart and steps.

Convert milliliters to cups (ml to cup) instantly: 125 milliliters is 0.528344 cups and 250 milliliters is 1.05669 cups. Exact factor, chart and steps.

Convert cups to milliliters (cup to ml) instantly: 0.5 cups is 118.294 milliliters and 1 cup is 236.588 milliliters. Exact factor, chart and steps.

Convert fluid ounces to liters (fl oz to L) instantly: 16 fluid ounces is 0.473176 liters and 32 fluid ounces is 0.946353 liters. Exact factor, chart and steps.

Convert liters to fluid ounces (L to fl oz) instantly: 0.5 liters is 16.907 fluid ounces and 1 liter is 33.814 fluid ounces. Exact factor, chart and steps.

Convert gallons to cups (gal to cup) instantly: 0.5 gallons is 8 cups and 1 gallon is 16 cups. Exact factor, chart and steps.

Convert pints to liters (pt to L) instantly: 1 pint is 0.473176 liters and 2 pints is 0.946353 liters. Exact factor, chart and steps.

Convert cubic feet to cubic meters (ft³ to m³) instantly: 10 cubic feet is 0.283168 cubic meters and 100 cubic feet is 2.83168 cubic meters. Exact factor, chart and steps.

Convert cubic yards to cubic feet (yd³ to ft³) instantly: 1 cubic yard is 27 cubic feet and 3 cubic yards is 81 cubic feet. Exact factor, chart and steps.

Convert tablespoons to cups (tbsp to cup) instantly: 4 tablespoons is 0.25 cups and 8 tablespoons is 0.5 cups. Exact factor, chart and steps.

Convert cups to tablespoons (cup to tbsp) instantly: 0.25 cups is 4 tablespoons and 0.333 cups is 5.328 tablespoons. Exact factor, chart and steps.

Convert teaspoons to tablespoons (tsp to tbsp) instantly: 1 teaspoon is 0.333333 tablespoons and 3 teaspoons is 1 tablespoons. Exact factor, chart and steps.

Convert tablespoons to teaspoons (tbsp to tsp) instantly: 0.5 tablespoons is 1.5 teaspoons and 1 tablespoon is 3 teaspoons. Exact factor, chart and steps.

Convert grams to ounces (g to oz) instantly: 50 grams is 1.7637 ounces and 125 grams is 4.40925 ounces. Exact factor, chart and steps.

Convert ounces to grams (oz to g) instantly: 1 ounce is 28.3495 grams and 4 ounces is 113.398 grams. Exact factor, chart and steps.

Convert ounces to pounds (oz to lb) instantly: 8 ounces is 0.5 pounds and 24 ounces is 1.5 pounds. Exact factor, chart and steps.

Convert pounds to ounces (lb to oz) instantly: 0.75 pounds is 12 ounces and 2.5 pounds is 40 ounces. Exact factor, chart and steps.

Convert grams to pounds (g to lb) instantly: 250 grams is 0.551156 pounds and 500 grams is 1.10231 pounds. Exact factor, chart and steps.

Convert pounds to grams (lb to g) instantly: 0.5 pounds is 226.796 grams and 1 pound is 453.592 grams. Exact factor, chart and steps.

Convert grams to kilograms (g to kg) instantly: 250 grams is 0.25 kilograms and 750 grams is 0.75 kilograms. Exact factor, chart and steps.

Convert kilograms to stone (kg to st) instantly: 60 kilograms is 9.44838 stone and 75 kilograms is 11.8105 stone. Exact factor, chart and steps.

Convert stone to kilograms (st to kg) instantly: 9 stone is 57.1526 kilograms and 12 stone is 76.2035 kilograms. Exact factor, chart and steps.

Convert acres to square feet (ac to ft²) instantly: 0.25 acres is 10,890 square feet and 1 acre is 43,560 square feet. Exact factor, chart and steps.

Convert hectares to acres (ha to ac) instantly: 1 hectare is 2.47105 acres and 10 hectares is 24.7105 acres. Exact factor, chart and steps.

Convert acres to hectares (ac to ha) instantly: 1 acre is 0.404686 hectares and 40 acres is 16.1874 hectares. Exact factor, chart and steps.

Convert square feet to square meters instantly: 100 square feet is 9.2903 square meters. Uses the exact factor, with a conversion chart and the steps shown.

Convert square meters to square feet (m² to ft²) instantly: 10 square meters is 107.639 square feet and 50 square meters is 538.196 square feet. Exact factor, chart and steps.

Convert kilometers per hour to miles per hour instantly: 50 kilometers per hour is 31.0686 miles per hour. Uses the exact factor, with a conversion chart and the steps shown.

Convert miles per hour to kilometers per hour instantly: 30 miles per hour is 48.2803 kilometers per hour. Uses the exact factor, with a conversion chart and the steps shown.

Convert knots to miles per hour (kn to mph) instantly: 10 knots is 11.5078 miles per hour and 34 knots is 39.1265 miles per hour. Exact factor, chart and steps.

Convert miles per hour to knots (mph to kn) instantly: 10 miles per hour is 8.68976 knots and 30 miles per hour is 26.0693 knots. Exact factor, chart and steps.

Convert degrees Celsius to kelvins (°C to K) instantly: 0 degrees Celsius is 273.15 kelvins and 25 degrees Celsius is 298.15 kelvins. Exact factor, chart and steps.