How it works
Find the share of a positive total. The part and total must use the same measurement or currency.
100 × part / total
Worked example
Show example inputs and result
Part: 30 · Total: 120.
- Share
- 25 %
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy