# All online calculators

- Side of regular polygon from polygon area
Calculates the side length of regular polygon given the area of the regular polygon and number of sides

- Simple Interest
Calculates simple interest

- Simple Interest Daily Rate
- Simple math in any numeral system
This online calculator supports simple math (addition, subtraction, division, multiplication and power) for numbers expressed in any numeral system - binary, octal, hexadecimal, from the base 2 to base 36

- Simple Moving Averageе
Simple Moving Average calculation based on candles

- Sine wave
Construction of a sine wave with the user's parameters

- Sobriety calculator
This online calculator calculates how long you’ve been clean and sober down to the second.

- Solution of a system of 3 linear equations
Solution of a system of 3 linear equations with 3 variables

- Solution of buckets and tank problem
This online calculator find a solution to the question how to fill tank with certain amount of water using two buckets of different size

- Solution of nonhomogeneous system of linear equations using matrix inverse
Solution of nonhomogeneous system of linear equations using matrix inverse

- Solution of quadratic equation
Solution of quadratic equation, including complex roots

- Solving a system of equations of first degree with two unknowns
This calculator solves a system of equations of first degree with two unknowns.

- Solving limit problems using L'Hospital's Rule
Solving 0/0 and ∞/∞ limit problems using L'Hospital's Rule.

- Sound Speed in Gases
This online calculator computes speed of sound in an ideal gas.

- Space object velocity
It calculates the circular orbital velocity, escape velocity and planetary system escape velocity for the given planet parameters.

- Spearman's correlation coefficient
Calculates Spearman's rank correlation coefficient

- Sphere
- Spherical cap and spherical segment
This calculator computes volume and surface area of spherical cap and spherical segment

- Spherical sector
Calculates surface area and volume of Spherical sector by radius and height

- Square Door Tank Volume
Use this calculator to determine tank volume if you've modified the tank for square doors.