All online calculators

  • Date and number of working days

    Calculator calculates the date of the initial date and the number of working days. Taking into account weekends, holidays and weekend shifts at work days, according to the published decrees of the government of the Russian Federation. Created by user's request.

  • Date by the Julian Day Number

    Displays Gregorian calendar date corresponding to Julian Day Number

  • Date plus days

    This online calculator computes the result of addition/subtraction of the given number of days to the given date.

  • Day of week by date

    This online calculator outputs day of week for given date

  • Density of oil

    Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard

Days between dates. A historical version.

Calculates number of days between two dates taking in account the date of transition to Gregorian calendar.

Days between dates. Historically accurate version.Creative Commons Attribution/Share-Alike License 3.0 (Unported)

Derivative calculator

Online calculator which determines first derivative of a function

Derivative calculatorCreative Commons Attribution/Share-Alike License 3.0 (Unported)

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