All online calculators

• Parallel and perpendicular lines on a plane

  This online calculator checks lines' slopes to see if they are parallel or perpendicular

• PATHFINDER cipher checker

  This online calculator decrypts digits encrypted by PATHFINDER type of cipher.

• PBX channel number calculation

  Calculates number of PBX telecommunications channels for given traffic load using Erlang B and Engset algorithms

• Pearson correlation coefficient

  The calculation of the correlation coefficient of two random variables

• Peptide dissolution calculator

  Peptides dissolution calculator

• Peptides dissolution calculator.

  Peptides dissolution calculator.

• Percentage

  This online calculator gives the percentage of the value. It also calculates the percentage of the sum (e.g. the income tax of the net salary) and the percentage of the difference (e.g. VAT of the gross amount).

• Personal finance planner

  The calculator allows to control personal finances.

• Petroleum product density

  Petroleum product density conversion, according to GOST 3900-85

• Pigpen cipher decoder

  This online calculator can decode messages written in the pigpen cipher

• Pipe cold bending. Flexure depth with main shaft.

  Calculates the section flexure depth with pipe bender or bending machine to obtain given parameters.

• Plane angles measurement systems
• Playfair cipher

  This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.

• Points of the compass

  This online calculator outputs compass point given direction angle in degrees. Different compass roses (4, 8, 16, 32, 128-wind compass roses) are supported.

• Poisson Distribution. Probability density function, cumulative distribution function, mean and variance

  This calculator calculates poisson distribution pdf, cdf, mean and variance for given parameters

• Polygon area

  Online calculator which calculates area of a polygon given lengths of polygon sides and diagonals which split polygon to nonoverlapping triangles

• Polynomial division

  This calculator divides one polynomial by another polynomial.

• Polynomial Greatest Common Divisor

  The calculator gives the greatest common divisor (GCD) of two input polynomials.

• Polynomial multiplication

  This calculator multiplies two univariate polynomials.

• Polynomial root isolation

  The calculators isolates real roots of the input univariate polynomial using Sturm and VAS-CF methods.