How to use the Lab / Practical Marks Calculator
- 1. Enter experiment marksList the marks for each experiment and what each is out of.
- 2. Add other partsAdd record, viva and internal tests as: name, scored, out of, counts for.
- 3. See your marksGet internal lab marks and the external practical marks needed to pass.
How lab marks are added up
Lab subjects usually have continuous evaluation (marks for each experiment), a lab record or file, a viva, and an internal practical test, followed by an external practical exam. Each part counts for a set number of marks.
The tool averages your experiment marks and scales them: experiment marks = average ÷ out of × the marks experiments count for. Each other part is scored ÷ out of × counts for. The internal total is the sum.
Worked example with the defaults: eight experiments average 8.13 out of 10, which scales to 12.19 out of 15. The record gives 4 of 5, the viva 3.5 of 5 and the internal test 10.5 of 15. The internal total is 30.19 out of 40.
Marks needed in the external practical
With 40 internal and 60 external marks and a 40% pass rule on the total, you need 40 marks overall. 40 − 30.19 = 9.81, but the 40% external minimum (24 of 60) is higher, so you need 24 out of 60.
The split between parts, and the pass rules, are different for every university and lab. Copy them from your syllabus or lab manual. For theory subjects, use the internal marks calculator. To make the index page for your practical file, try the lab file index generator.
Frequently asked questions
Are experiments averaged or added?
This tool averages them and scales to the marks they count for, which is common. If yours adds them, enter one line in other parts with the total.
What if there is no separate external minimum?
Enter 0 in the external pass mark field.
Can I leave out record or viva?
Yes. Delete those lines or clear the box.
Is this tool free?
Yes. You enter your name and WhatsApp number once when you see your result, and other Uncodemy tools then open without the form.