CIRCLE CALCULATOR
Enter radius or diameter • get circumference + area
Uses π • NO SCROLL
GIVEN
R
Calculator finds the other one
ROUNDING
2DP
Result rounding only
RADIUS
x
Enter r
π
CONST
π is built in
WORKING
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—
—
—
—
CIRC / AREA
READY
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GIVEN
R
Calculator finds the other one
ROUNDING
2DP
Result rounding only
RADIUS
x
Enter r
π
CONST
π is built in
WORKING
—
—
—
—
—
CIRC / AREA
READY
—
PAGE 1/2
HOW TO USE
1) Choose GIVEN: r or d
2) Enter the value
3) Press SOLVE
4) Read circ + area
FORMULAS
d = 2r
C = 2πr = πd
A = πr²
WORKED EXAMPLE
Given r = 4
d = 2×4 = 8
C = 2π×4 ≈ 25.13
A = π×4² ≈ 50.27
TIPS
Units: keep consistent
Area uses units²
Circ uses units
Round at the end
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