# All online calculators

- Pressure over a surface
This online calculator computes pressure, cause by given mass over given surface in gravity field. Result is displayed using different units of pressure

- Pressure units converter
Calculator which converts units of pressure

- Price based on running meter
This online calculator calculates the price of certain area based on price of running or linear meter

- Probability of given number success events in several Bernoulli trials
Gives probability of k success outcomes in n Bernoulli trials with given success event probability.

- Probability Urn simulator
This calculator simulates urn or box with colored balls often used for probability problems and can calculate probabilities of different events.

- Progressive tax
Calculates progressive tax according to tax rate table.

- Projection
Calculation of unknown parameters of projection using known parameters. Parameters are duration, maximum height, distance, initial velocity and angle.

- Proportion
This online calculator finds unknown member of proportion. Created by user's request

- Proportionality of body — McCallum's formula
- Prospect distance from the ground and line of sight distance between two observers
Calculates the prospect distance from height at observer and line of sight distance between two observers.

- Prueba2
- PSAT/NMSQT Practice Tests Score Calculator
This calculator helps you to score your official practice tests results.

- Pythagorean theorem calculator
Calculates the side length of a right triangle from two other sides using Pythagorean theorem. Created by user's request

- Quantity of heat
This calculator can find missing values in the relationship between heat and temperature: heat added or removed, specific heat, mass, initial temperature and final temperature

- Quartic equation solution
This calculator produces quartic equation solution using resolvent cubic.

- Racing laps table
This is generator of lap running order for kart racing. The goal is to let each racer to try each starting position/kart in random order.

- RAID arrays сalculator
This calculators shows the possible variants of RAID arrays, based on the number of drives available.

- Rail fence cipher
This article contains two calculators, first can be used to encode message with the rail fence cipher, second can be used to crack message encoded with the rail fence cipher by brute force. Decoded simply outputs decoded message for different number of "rails".

- Random combination of numbers from specified range
This calculator randomly picks several numbers from specified range.

- Random Latin Quote
Random Latin Quote