Duration from degree days calculator

Divide accumulated degree days by the constant positive temperature difference to find the corresponding duration.

Units

\text{Days} = \frac{\mathrm{DD}}{\Delta T}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

\text{Days} = \frac{270}{15} = 18

Symbol	Meaning	Unit
$\text{Days}$	constant-temperature duration	day
$\mathrm{DD}$	accumulated degree days	°F·day
$\Delta T$	constant positive difference from base	°F

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.