Timelapse calculator: how long your clip will be, how many frames it takes and how much card space it eats, before you spend the evening finding out.
All the free tools
Every tool fastast serves, each on its own page. No account, no e-mail, nothing stored — open one, use it, close the tab.
Every tool here does one thing, on one page, and asks nothing of you: no account, no e-mail address, no cookie banner to dismiss before you can work. Type what you need, read the answer, close the tab. Nothing you enter is kept.
Each tool has its own address, so a link to one is a link to that tool alone. The list below is the whole set, and the search box filters it by name or by what a tool does.
How long your trails will be, how many frames the session takes, and whether the gap between them will turn the trails into dotted lines. Free, no sign-up.
What to set once the filter is on — including two filters stacked, where the stops add and the numbers on the rings do not. Free, no sign-up, nothing stored.
Hyperfocal distance calculator: where to focus so foreground and horizon come out sharp, and exactly what is sharp if you focus elsewhere. Free.
NPF rule calculator: how long you can expose the night sky before stars trail, from your sensor, lens and where you point, not focal length alone.