3 calculators
Grade Calculators
Your GPA and the score you need, before the final
These grade calculators handle the school math that comes up every semester: your GPA weighted by credit hours, the score you need on the final to reach your goal and the letter grade for a percent.
See all 3 calculatorsThe key idea
Your GPA is not an average of letters: credit hours weigh each one
An A in a 4-credit class and a C in a 1-credit lab give a 3.60 GPA, not 3.00. Your biggest classes move your GPA the most, which is why it pays to know the weight of each one before the final.
What you can calculate
3 calculators, one for every question
GPA Calculator
Semester and cumulative GPA from letter grades and credits.
Calculate 02Final Grade Calculator
Your current grade, the final's weight and your goal. We tell you the score you need.
Calculate 03Letter Grade Calculator
Points to percent and letter grade, on the typical A-F scale.
CalculateHow we work
How we build calculators, in three principles
Diagnosis
Source first
Every formula comes from the law, the agency or the original study.
If a calculation depends on a rule (federal tax brackets, the Fair Labor Standards Act, Social Security), we start from the official text from the IRS, the Department of Labor or the SSA and link it on the page. If it depends on a study, we cite the study.
No figures copied from another calculator.
Method
Checked by hand
Every calculator is tested against cases worked out by hand.
The example on each page is one of those cases and matches the tool to the cent. We also test the edge cases: zeros, negatives, legal caps and odd dates.
When a rule changes, we review it and log the change on our corrections page.
Tool
Built to be understood
The result comes with the formula, the example and the common questions.
Everything runs in your browser, instantly and with no sign-up. You can share a calculation with a link, save it to your history or download it to Excel.
We do not store what you type.
Common questions
Frequently asked questions
How do I calculate my GPA?
Multiply each grade point by the course credits, add them up and divide by total credits. The GPA calculator does it for a semester and for your cumulative GPA.
What grade do I need on my final?
It depends on your current grade and how much the final is worth. With 88% now, a final worth 25% and a 90% goal, you need 96% on the final.
What is the usual letter grade scale?
A typical scale is A for 90–100%, B for 80–89%, C for 70–79%, D for 60–69% and F below 60%. Each school and teacher can set its own, so check your syllabus.
Is a weighted GPA different?
Yes: a weighted GPA gives extra points for honors, AP or IB classes. The GPA calculator gives the unweighted 4.0 GPA.
Can I type decimals?
Yes, with a decimal point: 3.75 or 88.5. The results are shown the same way.
Are my grades saved?
No. Everything runs in your browser; if you save a calculation, it stays on your device.
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