Calculators

Calculates the amount of fabric needed for quilt backing and batting, considering seam allowances and fabric width.

Estimates the amount of fabric needed to make a tote bag, considering dimensions and seam allowances.

Calculates the theoretical top speed of a boat based on its horsepower and displacement.

This calculator helps you compare the costs of drinking tap water versus bottled water, considering the price of tap water and the cost of bottled water.

Calculates the total wattage needed for solar panels based on household energy consumption and associated costs.

Converts numbers between decimal (base-10) and octal (base-8) number systems.

Converts a distance in light-years to other units of length, such as kilometers, miles, astronomical units, and parsecs.

Calculates distances in Astronomical Units (AU), where 1 AU is the average distance between the Earth and the Sun.

Calculates the number of floor joists needed and their total cost, based on room dimensions, joist spacing, and the cost per joist.

Calculates the amount of asphalt needed for a paving project based on the area and asphalt depth.