Calculators

Calculates the fabric requirements for a circle skirt based on waist circumference, skirt length, and optional fullness.

Converts engine hours into miles traveled, based on the average speed of the vehicle.

Calculates the hyperfocal distance, which is the distance at which a lens can be focused to achieve the greatest depth of field.

Calculates the range of distance in a photo that appears acceptably sharp, based on focal length, aperture, subject distance, and sensor size.

Helps determine correct camera settings (aperture, shutter speed, ISO) for optimal exposure.

Estimates the corn yield in bushels per acre based on a sample area and average ear count.

Estimates the carat weight of a diamond based on its shape and measurements.

Converts a date and time from one time zone to multiple other time zones.

Estimates the charging time for a battery based on its capacity, the charger's output current, and the battery's initial charge level.

Calculates the great-circle distance (shortest distance over the Earth's surface) between two points given their latitude and longitude coordinates.