Current to constant dollars calculator

Deflate a future nominal amount to base-year purchasing power.

C_{\text{constant,n}} = \frac{C_{\text{current,n}}}{\left(1 + f\right)^{n}}

Calculator

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

Given

C_{\text{constant,n}} = \frac{100}{\left(1 + 0.08\right)^{10}} \approx 46.319

Symbol	Meaning	Unit
$C_{\text{constant,n}}$	year-n amount expressed as base-year purchasing power	$
$C_{\text{current,n}}$	amount expressed using year-n prices	$
$f$	general inflation rate	decimal
$n$	elapsed years	years

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