Calculators

Calculates the number of light bulbs needed to adequately illuminate a room based on its dimensions, desired light level, and bulb specifications.

Estimates the volume and weight of soil needed for your garden or landscaping project based on dimensions and soil density.

Converts a decimal inch measurement into its equivalent fractional representation (inches and fractions of an inch).

Calculates the grade (slope) of an elevation change, expressed as a percentage. This is often used in construction, landscaping, and surveying to determine the steepness of a slope.

Calculates the spindle speed (RPM) and feed rate for machining operations based on cutting speed, tool diameter, and desired feed per tooth.

Calculates the estimated force needed to punch a hole in a material. This is based on the material's shear strength, the thickness of the material, and the perimeter of the hole.

Calculates the air changes per hour (ACH) in a room, which indicates how many times the total air volume in a room is replaced in one hour. This is crucial for ventilation and air quality assessment.

Calculates the amount of mulch needed for a garden or landscaping project based on area and desired depth.

Calculates the volume of a cylindrical pipe and the weight of a liquid it contains, given the pipe's dimensions and the liquid's density.

A tool for performing arithmetic operations on measurements in feet and inches, including fractions and decimals.