Calculated Property

A field whose value is derived by formula from other fields rather than entered. Cannot go stale through neglect, which makes it preferable wherever the value is derivable at all.

Also called: Formula Field, Roll-up Property

What it is

A calculated property computes its value from other properties: days since last contact, margin from amount and cost, a concatenated display name, whether a renewal falls this quarter. Nobody types it, so nobody forgets to.

Two kinds

  • Formula: derived from other fields on the same record. Arithmetic, dates, conditionals, string assembly.

  • Roll-up: derived from associated records — total value of open deals on a company, number of tickets in the last ninety days. Depends on associations being correct, which is worth knowing before trusting one.

Why they are usually the right answer

A manually maintained field is only as current as the last person who remembered. A derived field is current by construction. Any time you find yourself asking someone to keep a field up to date with information the system already holds, a calculated property is the answer.

The limits

They cannot be edited, which is correct but occasionally surprising. They can be expensive to recompute at volume. And a formula referencing a field somebody later deletes fails in ways that are not always loud — so calculated properties belong in the same governance review as everything else.

RELATED TERMS

COMMON QUESTIONS

What is the difference between a formula and a roll-up property?
A formula works from fields on the same record. A roll-up aggregates across associated records, so it depends on those associations being complete and correct.
Can I edit a calculated property?
No — its value comes from the formula. If you need to override it, you need a separate editable field and a deliberate rule about which one wins.
When should I not use one?
When the value is a judgement rather than a derivation. Health scores and qualification calls often look derivable and are not; forcing them into a formula produces a number that is precise and wrong.

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