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# The harmonic mean

Calculator based on the entered numbers separated by commas calculate the harmonic mean.

Long description

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## Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.

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## Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values of the basic trigonometric functions.

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## Arabic numbers Converter - Roman

Calculator converts numbers to roman Arabic or Roman to Arabic vice versa. The maximum value that the calculator correctly parse the number 3999.

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## Consumption Calculator mortar and grout

The calculator calculates the approximate consumption of mortar and grout when laying tiles on the given area , taking into account the amount of work gear tooth , tile size and the width and depth of the weld.

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## Purchase price / sales tax bill

Financial Calculator will calculate the price of the purchase or sale of Treasury bills and the amount and an annual discount rate.

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## Calculator floor panels

Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.

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## The geometric mean

Calculator based on the entered numbers separated by commas calculates the geometric mean.

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## Molar concentration of mass and volume

Calculator allows to determine the molar concentration of the solution.