Convert common metric measurements and use expanded charts for length, area, volume, mass and temperature.
Quick Converter
Enter a value and choose the units. The result updates automatically.
RESULT
How the Metric System Works
Metric units scale mainly by powers of ten. Move from a larger unit to a smaller unit by multiplying by the appropriate factor; move from smaller to larger by dividing. Area and volume require squared or cubed factors.
Prefix
Symbol
Factor
kilo
k
1,000
hecto
h
100
deca
da
10
unit
—
1
deci
d
0.1
centi
c
0.01
milli
m
0.001
Length Reference
Unit
Metric relationship
Approx. imperial
1 km
1,000 m
0.621371 mi
1 m
100 cm
3.28084 ft
1 cm
10 mm
0.393701 in
1 mm
0.1 cm
0.0393701 in
1 in
25.4 mm
2.54 cm
1 ft
12 in
0.3048 m
1 yd
3 ft
0.9144 m
1 mi
1,760 yd
1.609344 km
Area Reference
Unit
Relationship
Approx. comparison
1 m²
10,000 cm²
10.7639 ft²
1 ha
10,000 m²
2.47105 acres
1 km²
1,000,000 m²
0.386102 mi²
1 ft²
144 in²
0.09290304 m²
1 yd²
9 ft²
0.83612736 m²
1 acre
43,560 ft²
4,046.8564224 m²
1 mi²
640 acres
2.589988 km²
Volume & Capacity
Unit
Relationship
Also
1 L
1,000 mL
1,000 cm³
1 mL
1 cm³
0.001 L
1 m³
1,000 L
1,000,000 cm³
1 metric tsp
5 mL
—
1 metric tbsp
20 mL
4 metric tsp
1 metric cup
250 mL
12.5 metric tbsp
1 US fl oz
29.5735 mL
—
1 US gallon
3.78541 L
—
1 Imperial gallon
4.54609 L
—
Mass Reference
Unit
Relationship
1 tonne
1,000 kg
1 kg
1,000 g
1 g
1,000 mg
1 lb
453.59237 g
1 oz
28.349523125 g
Temperature Reference
Celsius
Fahrenheit
Kelvin
-40°C
-40°F
233.15 K
0°C
32°F
273.15 K
10°C
50°F
283.15 K
20°C
68°F
293.15 K
25°C
77°F
298.15 K
30°C
86°F
303.15 K
37°C
98.6°F
310.15 K
100°C
212°F
373.15 K
Important Conversion Rules
Length conversions use a linear factor.
Area conversions square the length factor: 1 m = 100 cm, but 1 m² = 10,000 cm².