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How far was struck by lightning

Calculator based on the specified time from seeing lightning until you hear thunder in the distance calculated discharge occurred.

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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description

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Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.

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Battery charging time calculator

Calculator to the data calculates the estimated time of charging.

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Student loan repayment calculator in Poland

The calculator student loan payments incurred for the specified period.

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Verifiers

Verifier numbers EAN-13 preview

Verifier numbers EAN-13 Calculator allows you to verify the number entered EAN-13.

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Converter phone number

The converter accepts input alphanumeric phone number and converts it to a numeric format.

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Math

Calculation fields of plane figures

Jak obliczyć pole figury płaskiej?
Jak obliczyć pole kwadratu?
Jak obliczyć pole prostokąta?
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Jak obliczyć pole trapezu?
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Calculator helps you calculate the area of the selected shape.

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Math

Centroid of the triangle

The calculator calculates the centroid of the triangle. Centroid is the point through which the median of the three triangle. It divides each median in the ratio of 2:1.