GPA Calculator
Calculate your GPA on a 4.0 scale. Pick a letter grade and enter the credit hours for each course; we'll weight them to find your grade point average.
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GPA planning calculator
Figure out what GPA you need in your upcoming credits to hit a target cumulative GPA.
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Check it outHow GPA is weighted
GPA isn't a simple average of your grades — it's weighted by credit hours, so a 4-credit course counts twice as much as a 2-credit one. Each letter maps to grade points (A = 4.0, B = 3.0, and so on); multiply by credits, sum, and divide by total credits. This uses the standard unweighted 4.0 scale.
How it’s calculated
GPA = Σ(grade points × credits) ÷ Σ credits on a 4.0 scale. If you turn on the Honors/AP/IB bonus, any course you flag adds +0.5 to that course's grade points before weighting. If you enter a prior GPA and prior credits completed, those are merged in as Σ(grade points × credits) + (prior GPA × prior credits), divided by your total credits including the prior ones, to give a cumulative figure. The planning calculator solves for the GPA needed in your additional credits with target GPA × (current credits + additional credits) − current GPA × current credits, divided by additional credits.
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Worked example
An A (4.0) in a 3-credit class and a B (3.0) in a 4-credit class is a 3.43 GPA.
Common mistakes
- Averaging grades without weighting by credit hours.
- Mixing weighted (5.0) and unweighted scales.
Frequently asked questions
How are letter grades converted?
A = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, and so on down to F = 0.0 on the standard 4.0 scale.
What about weighted (5.0) GPAs?
Honors and AP courses sometimes add points. This tool uses the standard unweighted scale; add the bonus to those grades if your school weights them.
Why do credits matter?
Higher-credit courses influence your GPA more, which is why one bad grade in a big class hurts more than in a small one.
How does the Honors/AP weighting toggle work?
Turn on “Add +0.5 bonus for Honors/AP/IB courses?” and check the Hon/AP box next to any course that qualifies. That course's grade points get +0.5 added before the credit-weighted average is calculated — the standard way most U.S. high schools implement weighted GPA bonuses. Leave it off (the default) to use the plain unweighted 4.0 scale.
Can I merge in my prior GPA?
Yes — enter your prior GPA and prior credits completed and they'll be merged into the running total (prior GPA × prior credits, added to this semester's grade points) before dividing by your combined total credits, giving a cumulative GPA. Leave both at 0 to see just the courses entered above.
What does the GPA planning calculator do?
Enter your current GPA, current credits, target GPA, and how many additional credits you plan to take. It solves for the average GPA you'd need to earn in just those additional credits to reach your target cumulative GPA — useful for figuring out if a goal is realistic before the semester starts.