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volume and surface area
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Volume and surface area of a sphere
A sphere is defined by the centre and the radius or diameter.
sphere
sphere
d
r
O
C
r
radius
d
diameter
C
circumference
O
center
Calculator
Select the units of measurement
pm
nm
μm
mm
cm
dm
m
km
in
ft
yd
mi
Enter 1 value
radius
r =
pm
nm
μm
mm
cm
dm
m
km
in
ft
yd
mi
diameter
d =
pm
nm
μm
mm
cm
dm
m
km
in
ft
yd
mi
circumference
C =
pm
nm
μm
mm
cm
dm
m
km
in
ft
yd
mi
volume
V =
pm³
nm³
μm³
mm³
cm³
dm³
m³
km³
mL
cL
dL
L
hL
in³
ft³
yd³
mi³
pt
qt
gal
pk
bu
gi
cup
pt
qt
gal
gi
pt
qt
gal
surface area
A =
pm²
nm²
μm²
mm²
cm²
dm²
m²
a
ha
km²
in²
ft²
yd²
acre
mi²
Error
Round to
decimal place
Calculation procedure
Formulas
sphere
volume
$$ V = \frac{4}{3} \pi r^3 $$
surface area
$$ A = 4 \cdot \pi r^2 $$
circumference
$$ C = 2 \cdot \pi r $$
diameter
$$ d = 2 \cdot r $$
$$ \pi \doteq 3.14 $$
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