All the figures on this page are ‘in today’s dollars’ which means they’ve been adjusted for inflation.
And it makes a big difference: save $500 per month for 35 years at 5% p.a. and you’ll end up with $570,913. Hooray! Job done! …except that in 35 years inflation will erode the purchasing power of that money and it won’t buy you the lifestyle it would today.
That’s why these figures - and the calculators we link to - must and do adjust for inflation.