Rule of Three
Solve proportions: if A gives B, what does C give?
Inputs
Units & format
Number format
Currency
Date format
Does this result look right?
How It Works
x = b * c / a
a = 5 · b = 12 · c = 15
Live — recalculated with your numbers
Version History (1 version)
- v1 7 Jul 2026
Sign in to join the discussion.
No comments yet — start the conversation.

calculator