About

One stack.
A visible set of assumptions.

Stackrange calculates a nominal signed sum and the worst-case endpoints of your separately entered dimensional intervals.

A focused arithmetic model

Each nominal size has a nonnegative lower and upper deviation. Added and subtracted rows contribute differently ordered endpoints. The tool combines those intervals exactly and can compare the entire result with an optional interval you enter. It does not choose the dimensional closure or infer a probability distribution.

The worked guide shows a complete housing/insert/spacer example, an independent eight-corner check and the reason a subtraction reverses endpoint order. It also explains repeated-variable correlation and omitted geometry.

Free browser-local use

There is no account, upload, paid feature or saved cloud session. No active advertising, analytics or consent-message loader is configured in this initial site. Publisher metadata and ads.txt prepare identification; they are not proof of approval, advertisements or earnings. Disclosures must be updated if this host's services change.

Stackrange is one independently hosted calculator in a free-tool portfolio. Contact uses an existing shared public forwarding alias, also used by Yardfill and other portfolio sites, rather than a new Stackrange mailbox.

Useful corrections

Include the row values, signs, units and any criterion when reporting an arithmetic issue. Avoid sensitive project details. The contact page is available without registration.