Work out negative marking score instantly with clear inputs, formula shown and shareable results.
The net score is correct answers times the marks each, less wrong answers times the penalty; accuracy is measured only over questions actually attempted. With +4 and -1 marking, guessing pays only above 20% accuracy, so knowing your accuracy rate is what decides whether to attempt a doubtful question.
Net score
net = correct x marks per correct - wrong x penalty per wrong
Break-even guess rate
guessing is worthwhile when accuracy > penalty / (marks per correct + penalty)
net = correct x marks per correct - wrong x penalty per wrong. The net score is correct answers times the marks each, less wrong answers times the penalty; accuracy is measured only over questions actually attempted.
With +4 and -1 marking, guessing pays only above 20% accuracy, so knowing your accuracy rate is what decides whether to attempt a doubtful question.
Enter correct answers, wrong answers, marks per correct answer, penalty per wrong answer. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.