Free PDF
Revit Formulas Cheat Sheet
Every Revit family formula function on one printable page — syntax, categories, and the unit rules that cause most “inconsistent units” errors. Pin it next to your monitor and stop searching for the same syntax twice.
Free, and it stays free. 29 functions across 7 categories.
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What is on it
Operators
The five arithmetic operators every formula is built from.
+ · − · × · ÷ · ^
Math
Absolute value, square roots, powers and constants.
abs() · sqrt() · pi() · exp() · log()
Rounding
Snap a calculated value to a manufacturing module.
round() · roundup() · rounddown()
Trigonometry
Angles, slopes, braces and anything on a diagonal.
sin() · cos() · tan() · atan() · asin() · acos()
Conditional logic
Make a family decide between values.
IF() · AND() · OR() · NOT() · Yes/No
Comparison
The operators that build a condition — and the two Revit does not have.
> · < · = · ≤
Lookup
Drive a family from an external table instead of nested IFs.
size_lookup()
Prefer to read it in the browser?
The cheat sheet is the printable summary. The Revit family formulas reference is the full version — every function with a worked example and the mistake people make with it. No email needed for that one.
Or read the full article series →Common questions
Is the Revit formulas cheat sheet really free?
Yes. It is a one-page PDF sent to your email at no cost. There is nothing to buy to receive it.
What is on the cheat sheet?
Every function available in Revit family formulas grouped by category — arithmetic operators, rounding, trigonometry, conditional logic, comparison operators and size_lookup — with the syntax for each and the unit rules that cause most errors.
Which Revit versions does it cover?
The formula syntax covered has been stable across recent Revit versions, so the cheat sheet applies to current releases.
Can I print it or share it with my team?
Yes. It is designed to be printed on a single page and pinned next to your monitor, and you are welcome to share it with colleagues.