Circumference of a Circle Calculator

Circle Calculator

Inputs:

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Result:

The circumference of a circle with radius 1 is 6.283(*)

Formulas:

Image of Circle r = 1 d = 2 C = 6.28
C = 2·π·r
C = π·d
C = √4·π·A
π = 3.1415
A = area of the circle
C = circumference or perimeter
r = radius, d = diameter

Step-by-step Solution:

Circumference of a cicle in terms of radius:

Circumference = 2·π·r = 2·3.14·1 = 6.28(*)

In terms of diameter:

Circumference = π·d = 3.14·2 = 6.28(*)

In terms of area:

Circumference C = √4·π·A = √4·π·3.14 = 6.28(*)

(*) 6.283 meters exactly or limited to de precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

A circumference of 6.283 meters is equal to:

  • 0.006283 kilometers (km)
  • 628.3 centimeters (cm)
  • 6283 millimeters (mm)
  • 0.00390408 miles (mi)
  • 6.87117 yards (yd)
  • 20.6135 feet (ft)
  • 247.362 inches (in)
  • Quote of the day ...

    Use the this circumference length calculator above to find the perimeter of a circle given its radius, or other parameters.

    Formula to calculate the circumference of a circle

    Here a three ways to find the circumference or perimeter of a circle:

    Circumference length formula in terms of radius

    C = 2·π·r

    Circumference length formula in terms of diameter

    C = π·d

    Circumference length formula in terms of area

    C = √4·π·A

    Questions this calculator can answer:

    • How to find the perimeter of a circle with a radius of 1 meters?
    • A circle has a diameter of 2 meters. What is its circumference?
    • If a circle has a area of 3.142 square meters. What is its perimeter?

    Table that shows the Relation among Radius. Diameter. Area and Circumference of a Circle

    Note: All values are rounded to two decimal places.

    RadiusDiameterAreaCircumference
    0.10.20.030.63
    0.150.30.070.94
    0.20.40.131.26
    0.250.50.21.57
    0.30.60.281.88
    0.350.70.382.2
    0.40.80.52.51
    0.450.90.642.83
    0.510.793.14
    0.551.10.953.46
    0.61.21.133.77
    0.651.31.334.08
    0.71.41.544.4
    0.751.51.774.71
    0.81.62.015.03
    0.851.72.275.34
    0.91.82.545.65
    0.951.92.835.97
    123.146.28
    1.012.023.26.35
    1.022.043.276.41
    1.032.063.336.47
    1.042.083.46.53
    1.052.13.466.6
    1.062.123.536.66
    1.072.143.596.72
    1.082.163.666.79
    1.092.183.736.85
    1.12.23.86.91
    1.102.23.86.91
    1.112.223.876.97
    1.122.243.947.04
    1.132.264.017.1
    1.142.284.087.16
    1.152.34.157.23
    1.162.324.237.29
    1.172.344.37.35
    1.182.364.377.41
    1.192.384.457.48
    1.22.44.527.54
    1.202.44.527.54
    1.212.424.67.6
    1.222.444.677.67
    1.232.464.757.73
    1.242.484.837.79
    1.252.54.917.85
    1.262.524.997.92
    1.272.545.067.98
    1.282.565.148.04
    1.292.585.238.11
    1.32.65.318.17
    1.302.65.318.17
    1.312.625.398.23
    1.322.645.478.29
    1.332.665.558.36
    1.342.685.648.42
    1.352.75.728.48
    1.362.725.818.54
    1.372.745.898.61
    1.382.765.988.67
    1.392.786.078.73
    1.42.86.158.8
    1.402.86.158.8
    1.412.826.248.86
    1.422.846.338.92
    1.432.866.428.98
    1.442.886.519.05
    1.452.96.69.11
    1.462.926.699.17
    1.472.946.799.24
    1.482.966.889.3
    1.492.986.979.36
    1.537.079.42
    1.5037.079.42
    1.513.027.169.49
    1.523.047.259.55
    1.533.067.359.61
    1.543.087.459.68
    1.553.17.549.74
    1.563.127.649.8
    1.573.147.749.86
    1.583.167.849.93
    1.593.187.949.99
    1.63.28.0410.05
    1.603.28.0410.05
    1.613.228.1410.12
    1.623.248.2410.18
    1.633.268.3410.24
    1.643.288.4510.3
    1.653.38.5510.37
    1.663.328.6510.43
    1.673.348.7610.49
    1.683.368.8610.56
    1.693.388.9710.62
    1.73.49.0710.68
    1.703.49.0710.68
    1.713.429.1810.74
    1.723.449.2910.81
    1.733.469.410.87
    1.743.489.5110.93
    1.753.59.6211
    1.763.529.7311.06
    1.773.549.8411.12
    1.783.569.9511.18
    1.793.5810.0611.25
    1.83.610.1711.31
    1.803.610.1711.31
    1.813.6210.2911.37
    1.823.6410.411.44
    1.833.6610.5211.5
    1.843.6810.6311.56
    1.853.710.7511.62
    1.863.7210.8611.69
    1.873.7410.9811.75
    1.883.7611.111.81
    1.893.7811.2211.87
    1.93.811.3411.94
    1.903.811.3411.94
    1.913.8211.4612
    1.923.8411.5812.06
    1.933.8611.712.13
    1.943.8811.8212.19
    1.953.911.9412.25
    1.963.9212.0612.31
    RadiusDiameterAreaCircumference
    1.973.9412.1912.38
    1.983.9612.3112.44
    1.993.9812.4312.5
    2412.5612.57
    2.00412.5612.57
    2.014.0212.6912.63
    2.024.0412.8112.69
    2.034.0612.9412.75
    2.044.0813.0712.82
    2.054.113.212.88
    2.064.1213.3212.94
    2.074.1413.4513.01
    2.084.1613.5813.07
    2.094.1813.7213.13
    2.14.213.8513.19
    2.104.213.8513.19
    2.114.2213.9813.26
    2.124.2414.1113.32
    2.134.2614.2513.38
    2.144.2814.3813.45
    2.154.314.5113.51
    2.164.3214.6513.57
    2.174.3414.7913.63
    2.184.3614.9213.7
    2.194.3815.0613.76
    2.24.415.213.82
    2.204.415.213.82
    2.214.4215.3413.89
    2.224.4415.4813.95
    2.234.4615.6114.01
    2.244.4815.7614.07
    2.254.515.914.14
    2.264.5216.0414.2
    2.274.5416.1814.26
    2.284.5616.3214.33
    2.294.5816.4714.39
    2.34.616.6114.45
    2.304.616.6114.45
    2.314.6216.7614.51
    2.324.6416.914.58
    2.334.6617.0514.64
    2.344.6817.1914.7
    2.354.717.3414.77
    2.364.7217.4914.83
    2.374.7417.6414.89
    2.384.7617.7914.95
    2.394.7817.9415.02
    2.44.818.0915.08
    2.404.818.0915.08
    2.414.8218.2415.14
    2.424.8418.3915.2
    2.434.8618.5415.27
    2.444.8818.6915.33
    2.454.918.8515.39
    2.464.921915.46
    2.474.9419.1615.52
    2.484.9619.3115.58
    2.494.9819.4715.64
    2.5519.6315.71
    2.50519.6315.71
    2.515.0219.7815.77
    2.525.0419.9415.83
    2.535.0620.115.9
    2.545.0820.2615.96
    2.555.120.4216.02
    2.565.1220.5816.08
    2.575.1420.7416.15
    2.585.1620.916.21
    2.595.1821.0616.27
    2.65.221.2316.34
    2.605.221.2316.34
    2.615.2221.3916.4
    2.625.2421.5516.46
    2.635.2621.7216.52
    2.645.2821.8816.59
    2.655.322.0516.65
    2.665.3222.2216.71
    2.675.3422.3816.78
    2.685.3622.5516.84
    2.695.3822.7216.9
    2.75.422.8916.96
    2.705.422.8916.96
    2.715.4223.0617.03
    2.725.4423.2317.09
    2.735.4623.417.15
    2.745.4823.5717.22
    2.755.523.7517.28
    2.765.5223.9217.34
    2.775.5424.0917.4
    2.785.5624.2717.47
    2.795.5824.4417.53
    2.85.624.6217.59
    2.805.624.6217.59
    2.815.6224.7917.66
    2.825.6424.9717.72
    2.835.6625.1517.78
    2.845.6825.3317.84
    2.855.725.517.91
    2.865.7225.6817.97
    2.875.7425.8618.03
    2.885.7626.0418.1
    2.895.7826.2318.16
    2.95.826.4118.22
    2.905.826.4118.22
    2.915.8226.5918.28
    2.925.8426.7718.35
    2.935.8626.9618.41
    2.945.8827.1418.47
    2.955.927.3318.53
    2.965.9227.5118.6
    2.975.9427.718.66
    2.985.9627.8818.72
    2.995.9828.0718.79
    3628.2618.85
    3.00628.2618.85
    3.016.0228.4518.91
    3.026.0428.6418.97
    3.036.0628.8319.04
    3.046.0829.0219.1
    3.056.129.2119.16
    3.066.1229.419.23
    3.076.1429.5919.29
    3.086.1629.7919.35
    3.096.1829.9819.41
    3.16.230.1819.48

    Disclaimer

    While every effort is made to ensure the accuracy of the information provided on this website, neither this website nor its authors are responsible for any errors or omissions. Therefore, the contents of this site are not suitable for any use involving risk to health, finances or property.