Extra Credit Calculator Formula

Understand the math behind the extra credit calculator. Each variable explained with a worked example.

Use the Extra Credit Calculator

Formulas Used

New Grade

new_grade = (current_points + extra_credit_points) / total_points * 100

Grade Improvement

grade_boost = extra_credit_points / total_points * 100

New Total Points

new_total_points = current_points + extra_credit_points

Variables

VariableDescriptionDefault
current_scoreCurrent Score(%)82
total_pointsTotal Points Possible500
extra_credit_pointsExtra Credit Points20
current_pointsDerived value= current_score / 100 * total_pointscalculated

How It Works

How Extra Credit Affects Your Grade

Extra credit adds points without increasing the possible total.

Formula

New Grade = (Current Points + Extra Credit) / Total Possible x 100

Boost = Extra Credit / Total Possible x 100

Worked Example

82% in a 500-point course, earning 20 extra credit points.

current_score = 82total_points = 500extra_credit_points = 20
  1. 01Current points: 82% x 500 = 410
  2. 02New total: 410 + 20 = 430
  3. 03New grade: 430 / 500 x 100 = 86.0%
  4. 04Boost: 20 / 500 x 100 = 4.0%

Ready to run the numbers?

Open Extra Credit Calculator