Length
If working with feet, inches and fractions or a combination of these, express the length in inches before converting. Use a calculator or consult our Fraction-to-Decimal Conversion Charts if necessary, to get decimal equivalents for fractions.
Example: Convert 5 feet, 5 and three-quarter inches to meters.
Convert feet to inches: 5 × 12 = 60 inches
Express three-quarters as a decimal: .75
Add values together: 60 + 5 + .75 = 65.75 inches
Now convert to meters:
One inch equals .0254 meter, so multiply.
65.75 × .0254 = 1.67005 (round off to hundredths: 1.67 meters).
- One meter equals
- 39.37 inches
- 3.2808 feet
- 1.0936 yards
- One centimeter equals
- .3937 inch
- One millimeter equals
- .03937 inch
- One kilometer equals
- 3280.84 feet
- 1093.61 yards
- .62137 mile
- .53996 nautical mile
- One nautical mile equals
- 1.852 kilometers
- 1852 meters
- 6076.115 feet
- 2025.372 yards
- 1.15078 miles
- One inch equals
- .0254 meter
- 2.54 centimeters
- 25.4 millimeters
- One foot equals
- .3048 meter
- 30.48 centimeters
- 304.8 millimeters
- 12 inches
- One yard equals
- .9144 meter
- 91.44 centimeters
- 914.4 millimeters
- 36 inches
- 3 feet
- One mile equals
- 1.609344 kilometers
- 1609.344 meters
- 5280 feet
- 1760 yards
- .868976 nautical mile
Mass or Weight
If working with pounds, ounces and fractions or a combination of these, express the value in ounces before converting.
Example: Convert 7 pounds, 9 and a half ounces to kilograms.
Convert pounds to ounces: 7 × 16 = 112
Express the half as a decimal: .5
Add values together: 112 + 9 + .5 = 121.5
Now convert to kilograms:
One ounce equals .02835 kilograms, so multiply.
121.5 × .02835 = 3.444525 (round off to hundredths: 3.44 kilograms).
- One metric ton equals
- 1.10229 U.S. tons
- 2204.59 pounds
- One kilogram equals
- 2.2046 pounds
- 35.273 ounces
- One gram equals
- .035273 ounce
- 15.432 grains
- One U.S. ton equals
- 907.2 kilograms
- .9072 metric tons
- 2000 pounds
- One pound equals
- 453.6 grams
- .4536 kilograms
- 16 ounces
- 7000 grains
- One ounce equals
- 28.35 grams
- .02835 kilograms
- 437.5 grains
- One grain equals
- 64.8 milligrams
Temperature
To convert Celsius to Fahrenheit, multiply by 1.8, then add 32.
Example: 10° Celsius
10 × 1.8 = 18
18 + 32 = 50° Fahrenheit
To convert Fahrenheit to Celsius, subtract 32, then divide by 1.8.
Example: 77° Fahrenheit
77 - 32 = 45
45 ÷ 1.8 = 25° Celsius
Velocity
- One meter per second equals
- 3.6 kilometers per hour
- 2.2369 miles per hour
- 1.9438 knots
- 3.2808 feet per second
- One kilometer per hour equals
- .27778 meters per second
- .62137 miles per hour
- .53996 knots
- .91134 feet per second
- One kilometer per second equals
- 3600 kilometers per hour
- 2236.94 miles per hour
- 1943.84 knots
- 3280.84 feet per second
- .62137 miles per second
- One mile per hour equals
- .44704 meters per second
- 1.6093 kilometers per hour
- .86898 knots
- 1.4667 feet per second
- One knot equals
- .51444 meters per second
- 1.852 kilometers per hour
- 1.1508 miles per hour
- 1.6878 feet per second
- One foot per second equals
- .3048 meters per second
- 1.09728 kilometers per hour
- .68182 miles per hour
- .59248 knots
- One mile per second equals
- 1609.344 meters per second
- 5793.6384 kilometers per hour
- 3600 miles per hour
- 3128.31 knots
- 5280 feet per second
Pressure
- One kilopascal equals
- .2953 inches of mercury
- 7.5006 millimeters of mercury
- .14504 pounds per square inch
- One hectopascal (used in U.S. aviation weather reports) equals
- .1 kilopascal or 100 pascals
- One inch of mercury equals
- 3.38638 kilopascals
- 25.4 millimeters of mercury
- .49115 pound per square inch
- One millimeter of mercury equals
- .133322 kilopascal
- 133.322 pascals
- .03937 inch of mercury
- .019337 pound per square inch
- One pound per square inch equals
- 6.894757 kilopascals
- 2.036 inches of mercury
- 51.715 millimeters of mercury
Area
To calculate area from dimensions:
- Be sure both dimensions are in the same units (meters or whatever).
- Multiply length times width to get square units.
- Convert square units if desired.
Example: A room measures 13 by 15 feet. Calculate the area in square meters.
13 feet × 15 feet = 195 square feet.
One square foot equals .0929 square meter, so multiply by .0929.
195 × .0929 = 18.1155 square meters.
Tenths of a square meter is probably sufficient. Round off to 18.1.
- One square meter equals
- 1550 square inches
- 10.7639 square feet
- 1.19599 square yards
- One square centimeter equals
- .155 square inch
- One square millimeter equals
- .00155 square inch
- One hectare equals
- 107639.1 square feet
- 11959.9 square yards
- 2.471 acres
- .003861 square mile
- .0029155 square nautical mile
- One square kilometer equals
- 247.105 acres
- .3861 square mile
- .29155 square nautical mile
- One square inch equals
- 6.4516 square centimeters
- 645.16 square millimeters
- One square foot equals
- .0929 square meter
- 929.03 square centimeters
- 144 square inches
- One square yard equals
- .83613 square meter
- 1296 square inches
- 9 square feet
- One acre equals
- 4046.86 square meters
- .4047 hectare
- .004047 square kilometers
- 43560 square feet
- 4840 square yards
- .0015625 square mile
- .0011799 square nautical mile
- One square mile equals
- 258.9988 hectares
- 2.59 square kilometers
- 640 acres
- .75512 square nautical mile
- One square nautical mile equals
- 342.9904 hectares
- 3.4299 square kilometers
- 847.55 acres
- 1.3243 square miles
Capacity or Volume
To calculate capacity or volume from dimensions:
- Be sure all dimensions are in the same units (meters or whatever).
- Multiply length times width times height to get cubic units.
- Convert cubic units if desired.
Example: A refrigerator is 60 inches high, 24 inches wide and 18 inches deep (interior dimensions). Calculate the capacity in cubic feet.
60 inches × 24 inches × 18 inches = 25920 cubic inches.
One cubic foot equals 1728 cubic inches, so divide by 1728.
25920 ÷ 1728 = 15 cubic feet capacity.
- One fluid ounce equals
- 29.5735 milliliters
- 6 teaspoons
- 2 tablespoons
- .125 cup
- 1.8047 cubic inches
- One liquid cup equals
- 236.588 milliliters
- 48 teaspoons
- 16 tablespoons
- 8 fluid ounces
- .5 pint
- .25 quart
- 14.4375 cubic inches
- One liquid pint equals
- .47318 liter
- 473.176 milliliters
- 96 teaspoons
- 32 tablespoons
- 16 fluid ounces
- 2 cups
- .5 quart
- .125 gallon
- 28.875 cubic inches
- One liter equals
- 202.88 teaspoons
- 67.628 tablespoons
- 33.814 fluid ounces
- 4.2268 cups
- 2.1134 pints
- 1.0567 quarts
- .26417 gallon
- .11377 peck
- 61.0237 cubic inches
- One milliliter equals
- .20288 teaspoon
- One cubic meter equals
- 264.172 gallons
- 113.765 pecks
- 28.4413 bushels
- 35.3147 cubic feet
- 1.30795 cubic yards
- One teaspoon equals
- 4.9289 milliliters
- .30078 cubic inch
- One tablespoon equals
- 14.7868 milliliters
- 3 teaspoons
- .5 fluid ounce
- .90234 cubic inch
- One liquid quart equals
- .94635 liter
- 946.353 milliliters
- 192 teaspoons
- 64 tablespoons
- 32 fluid ounces
- 4 cups
- 2 pints
- .25 gallon
- 57.75 cubic inches
- One liquid gallon equals
- 3.7854 liters
- 768 teaspoons
- 256 tablespoons
- 128 fluid ounces
- 16 cups
- 8 pints
- 4 quarts
- 231 cubic inches
- One dry peck equals
- 8.79 liters
- .25 bushel
- 536.4 cubic inches
- One dry bushel equals
- 35.16 liters
- 4 pecks
- 2145.6 cubic inches
- 1.2417 cubic feet
- One cubic inch equals
- 16.3871 milliliters
- 3.3247 teaspoons
- 1.1082 tablespoons
- .55411 fluid ounce
- One cubic foot equals
- 28.3168 liters
- 7.48052 gallons
- 3.22148 pecks
- .80537 bushel
- 1728 cubic inches
- One cubic yard equals
- 764.555 liters
- .76455 cubic meter
- 201.974 gallons
- 86.98 pecks
- 21.745 bushels
- 27 cubic feet
Density
- One gram per cubic centimeter equals
- 1000 kilograms per cubic meter
- 62.4269 pounds per cubic foot
- 998.83 ounces per cubic foot
- One pound per cubic foot equals
- 16.0187 kilograms per cubic meter
- One ounce per cubic foot equals
- 1.00117 kilograms per cubic meter