This tool will calculate the area of a circle from the radius, and will convert different measurement units for radius and area.

# Area Calculators

Online web tools for converting and calculating area of two dimensional objects, spaces or cross-sections.

## Radius to Surface Area of Sphere Calculator

This tool will calculate the surface area of a sphere from the radius, and will convert different measurement units for radius and surface area.

## Diameter to Surface Area of Sphere Calculator

This tool will calculate the surface area of a sphere from the diameter, and will convert different measurement units for diameter and surface area.

## Force & Pressure to Area Calculator

Use this calculator to determine the area of a contact surface which when subjected to a defined applied force results in generating the selected pressure.

## Mass Total and Area Density to Total Area Calculator

This calculator is used to determine the total area of an item from the total mass measured with a specified area density.

## Area Converter

This area converter and conversion scale is used to convert any measurement of surface or land area from one unit of area to another.

## Length & Width to Area Calculator

This tool will calculate the area of a rectangle from the dimensions of length and width. No manual conversion is necessary for length, width and area units, which can all be selected independently.

## Diameter to Area of Circle Calculator

This tool will calculate the area of a circle from the diameter, and will convert different measurement units for diameter and area.

## Volume Flow & Speed to Area Calculator

Calculate the flow area from the rate of volume flow and the speed of the flow, and display a conversion scale for a range of flow rates and areas.