Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Assumes every new session is attended. Reports 0% before any sessions; institutional attendance rules may differ.
Example Calculation
- Sessions held: 40
- Sessions attended: 28
- Target attendance: 75 %
28 of 40 sessions is 70%. Attending eight more makes 36/48=75%.
Frequently asked questions
How do I use this calculator?
Enter sessions held, sessions attended, target attendance. The result updates automatically. Use Reset to restore the example values.
What method does it use?
additional attended sessions n satisfy (attended+n)/(held+n) ≥ target.. Assumes every new session is attended. Reports 0% before any sessions; institutional attendance rules may differ.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.