Sam Gorman

Convert cm^2 to ft^2 or ft^2 to cm^2, with square-inch check, rounding control, and the conversion factor used.

Convert square feet to square centimeters, or enter length and width in feet to convert the area.

Convert degrees Rankine to Kelvin using the exact 5/9 factor, with no offset and adjustable answer decimal places.

Convert kelvin to Rankine or Rankine to kelvin with rounding, formulas, and safe handling for actual temperatures and changes.

Convert a Rankine temperature to Celsius. Enter deg R, choose result rounding, and get the matching deg C temperature.

Convert deg C to deg R for temperature readings or temperature changes, with Kelvin and Fahrenheit checks.

Convert degrees Rankine to Fahrenheit. Enter a Rankine temperature of 0 R or greater and choose displayed decimal places.

Convert a Fahrenheit temperature to Rankine, or convert a temperature rise or drop without adding the 459.67 offset.

Convert km^2 to hectares or hectares to km^2 with the exact factor of 100, optional m^2 and acres, and safe rounding.

Convert cubic feet and acre-feet, show gallons, and check average water depth over any land area in acres.