Number of tetrahedral
Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.
Weighted average ratings
The calculator calculates the weighted average of the ratings of the following items.
Trigonometric functions calculator
Calculator by entering an angle in degrees or radians calculated values of the basic trigonometric functions.
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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Calculator allows you to calculate the approximate download time on a given value for a circuit given parameters.
Calculator allows you to calculate the probability of a given number of successes with a specified number of trials and probability of success.
Parallel connection of resistors
The calculator calculates the equivalent resistance of two resistors connected in parallel.
Unit Converter glucose (blood sugar)
converter converts the blood sugar level in milligrams per deciliter (mg / dL) in millimoles per liter (mmol / L) and vice versa. http://pl.wikipedia.org/wiki/Glikemia
Calculator VAT refund for building materials
The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.