Unit conversions

33 unit conversions people look up most, each with the exact formula, a table of common values, and the converter pre-set to that pair. Every number is calculated by the same function as the site's Unit Converter.

Below the conversions are the specific values people search for most — heights, body weights, oven and body temperatures, and race distances — each with the context that makes the number useful.

Main tool: Unit Converter

Length conversions

Length unit conversions
Conversion	Rule
Centimeters to Inches	1 cm = 0.393701 in
Inches to Centimeters	1 in = 2.54 cm
Millimeters to Inches	1 mm = 0.0393701 in
Inches to Millimeters	1 in = 25.4 mm
Meters to Feet	1 m = 3.28084 ft
Feet to Meters	1 ft = 0.3048 m
Kilometers to Miles	1 km = 0.621371 mi
Miles to Kilometers	1 mi = 1.60934 km
Centimeters to Feet	1 cm = 0.0328084 ft
Feet to Centimeters	1 ft = 30.48 cm
Yards to Meters	1 yd = 0.9144 m
Meters to Yards	1 m = 1.09361 yd

Weight conversions

Weight unit conversions
Conversion	Rule
Kilograms to Pounds	1 kg = 2.20462 lb
Pounds to Kilograms	1 lb = 0.453592 kg
Grams to Ounces	1 g = 0.035274 oz
Ounces to Grams	1 oz = 28.3495 g
Stone to Pounds	1 st = 14 lb
Stone to Kilograms	1 st = 6.35029 kg
Kilograms to Stone	1 kg = 0.157473 st

Temperature conversions

Temperature unit conversions
Conversion	Rule
Celsius to Fahrenheit	°F = °C × 9/5 + 32
Fahrenheit to Celsius	°C = (°F − 32) × 5/9
Celsius to Kelvin	K = °C + 273.15
Kelvin to Celsius	°C = K − 273.15

Volume conversions

Volume unit conversions
Conversion	Rule
Liters to Gallons	1 L = 0.264172 gal
Gallons to Liters	1 gal = 3.78541 L
Cups to Milliliters	1 cups = 236.588 mL
Milliliters to Cups	1 mL = 0.00422675 cups
Tablespoons to Milliliters	1 tbsp = 14.7868 mL
Teaspoons to Milliliters	1 tsp = 4.92892 mL
Cups to Tablespoons	1 cups = 16 tbsp

Speed conversions

Speed unit conversions
Conversion	Rule
km/h to mph	1 km/h = 0.621371 mph
mph to km/h	1 mph = 1.60934 km/h
Knots to mph	1 kn = 1.15078 mph

Heights

Common heights converted
Value	Answer
4′10″ in cm	4 feet 10 inches is 147.3 centimeters.
4′11″ in cm	4 feet 11 inches is 149.9 centimeters.
5′0″ in cm	5 feet is 152.4 centimeters.
5′1″ in cm	5 feet 1 inch is 154.9 centimeters.
5′2″ in cm	5 feet 2 inches is 157.5 centimeters.
5′3″ in cm	5 feet 3 inches is 160 centimeters.
5′4″ in cm	5 feet 4 inches is 162.6 centimeters.
5′5″ in cm	5 feet 5 inches is 165.1 centimeters.
5′6″ in cm	5 feet 6 inches is 167.6 centimeters.
5′7″ in cm	5 feet 7 inches is 170.2 centimeters.
5′8″ in cm	5 feet 8 inches is 172.7 centimeters.
5′9″ in cm	5 feet 9 inches is 175.3 centimeters.
5′10″ in cm	5 feet 10 inches is 177.8 centimeters.
5′11″ in cm	5 feet 11 inches is 180.3 centimeters.
6′0″ in cm	6 feet is 182.9 centimeters.
6′1″ in cm	6 feet 1 inch is 185.4 centimeters.
6′2″ in cm	6 feet 2 inches is 188 centimeters.
6′3″ in cm	6 feet 3 inches is 190.5 centimeters.
6′4″ in cm	6 feet 4 inches is 193 centimeters.
150 cm in feet	150 centimeters is 4 feet 11.1 inches (4.92 feet).
155 cm in feet	155 centimeters is 5 feet 1 inches (5.09 feet).
160 cm in feet	160 centimeters is 5 feet 3 inches (5.25 feet).
165 cm in feet	165 centimeters is 5 feet 5 inches (5.41 feet).
170 cm in feet	170 centimeters is 5 feet 6.9 inches (5.58 feet).
175 cm in feet	175 centimeters is 5 feet 8.9 inches (5.74 feet).
180 cm in feet	180 centimeters is 5 feet 10.9 inches (5.91 feet).
185 cm in feet	185 centimeters is 6 feet 0.8 inches (6.07 feet).
190 cm in feet	190 centimeters is 6 feet 2.8 inches (6.23 feet).

Body weights

Common body weights converted
Value	Answer
100 lbs in kg	100 pounds is 45.36 kilograms.
110 lbs in kg	110 pounds is 49.9 kilograms.
120 lbs in kg	120 pounds is 54.43 kilograms.
130 lbs in kg	130 pounds is 58.97 kilograms.
140 lbs in kg	140 pounds is 63.5 kilograms.
150 lbs in kg	150 pounds is 68.04 kilograms.
160 lbs in kg	160 pounds is 72.57 kilograms.
170 lbs in kg	170 pounds is 77.11 kilograms.
180 lbs in kg	180 pounds is 81.65 kilograms.
190 lbs in kg	190 pounds is 86.18 kilograms.
200 lbs in kg	200 pounds is 90.72 kilograms.
220 lbs in kg	220 pounds is 99.79 kilograms.
250 lbs in kg	250 pounds is 113.4 kilograms.
50 kg in lbs	50 kilograms is 110.23 pounds.
55 kg in lbs	55 kilograms is 121.25 pounds.
60 kg in lbs	60 kilograms is 132.28 pounds.
65 kg in lbs	65 kilograms is 143.3 pounds.
70 kg in lbs	70 kilograms is 154.32 pounds.
75 kg in lbs	75 kilograms is 165.35 pounds.
80 kg in lbs	80 kilograms is 176.37 pounds.
85 kg in lbs	85 kilograms is 187.39 pounds.
90 kg in lbs	90 kilograms is 198.42 pounds.
100 kg in lbs	100 kilograms is 220.46 pounds.

Temperatures

Common temperatures converted
Value	Answer
0 °F in °C	0 degrees Fahrenheit is -17.78 degrees Celsius.
32 °F in °C	32 degrees Fahrenheit is 0 degrees Celsius.
68 °F in °C	68 degrees Fahrenheit is 20 degrees Celsius.
72 °F in °C	72 degrees Fahrenheit is 22.22 degrees Celsius.
98.6 °F in °C	98.6 degrees Fahrenheit is 37 degrees Celsius.
100.4 °F in °C	100.4 degrees Fahrenheit is 38 degrees Celsius.
212 °F in °C	212 degrees Fahrenheit is 100 degrees Celsius.
325 °F in °C	325 degrees Fahrenheit is 162.78 degrees Celsius.
350 °F in °C	350 degrees Fahrenheit is 176.67 degrees Celsius.
375 °F in °C	375 degrees Fahrenheit is 190.56 degrees Celsius.
400 °F in °C	400 degrees Fahrenheit is 204.44 degrees Celsius.
425 °F in °C	425 degrees Fahrenheit is 218.33 degrees Celsius.
450 °F in °C	450 degrees Fahrenheit is 232.22 degrees Celsius.
-40 °C in °F	-40 degrees Celsius is -40 degrees Fahrenheit.
0 °C in °F	0 degrees Celsius is 32 degrees Fahrenheit.
20 °C in °F	20 degrees Celsius is 68 degrees Fahrenheit.
25 °C in °F	25 degrees Celsius is 77 degrees Fahrenheit.
37 °C in °F	37 degrees Celsius is 98.6 degrees Fahrenheit.
38 °C in °F	38 degrees Celsius is 100.4 degrees Fahrenheit.
100 °C in °F	100 degrees Celsius is 212 degrees Fahrenheit.
180 °C in °F	180 degrees Celsius is 356 degrees Fahrenheit.
200 °C in °F	200 degrees Celsius is 392 degrees Fahrenheit.

Race distances

Common race distances converted
Value	Answer
5 km in miles	5 kilometers is 3.11 miles.
10 km in miles	10 kilometers is 6.21 miles.