How It Works

The calculator reads your list of grades and optional weights (credits). For each row it computes grade × weight, sums everything, and then divides by the sum of weights. This is the standard formula for a weighted average used in many Polish schools and universities as well as international credit-based systems.

In practice, “weight” can mean different things: ECTS credits, weekly classroom hours, a course level multiplier, or any other value your institution uses to signal importance. The important part is consistency—use the same kind of weights across the set of grades you are averaging.

If you leave the weight out, the tool assumes a weight of 1, which turns the calculation into a simple average. That makes the tool flexible: it can be both a classic GPA calculator and a quick “average grade” checker.

Step-by-step formula

• 1) Enter grades — Put one grade per line. You can add a weight after the grade (for example: 4.5 2).
• 2) Choose a scale — Select a common scale such as 1–6 (typical high school), 2–5 (many universities), or 0–100%.
• 3) Compute the weighted sum — The tool multiplies every grade by its weight and adds the results together.
• 4) Divide by total weight — The weighted GPA equals Σ(grade × weight) ÷ Σ(weight).
• 5) Round and present — The final GPA is rounded to the number of decimals you choose, and a breakdown is provided for transparency.

Quick example

Imagine you have three courses with different credits: Mathematics (grade 5.0, 4 credits), History (grade 4.0, 2 credits), and English (grade 4.5, 3 credits). The calculation is:

• Weighted sum: 5.0×4 + 4.0×2 + 4.5×3 = 20 + 8 + 13.5 = 41.5
• Total weight: 4 + 2 + 3 = 9
• Weighted GPA: 41.5 ÷ 9 = 4.611…

After rounding to two decimals, the GPA would be 4.61. This is exactly the kind of calculation that becomes tedious in a notebook but takes seconds in this tool.

Key Features

Fast paste-friendly input

Paste a whole semester at once—each line can contain a grade with an optional weight. The parser accepts common separators (spaces, tabs, commas, or semicolons) and supports decimal commas (for example 4,5), which is especially helpful when your grade list comes from Polish documentation or spreadsheets.

You do not need to format the input perfectly. If a line has only one number, the tool treats it as a grade with weight 1. If you paste extra empty lines, they are ignored. If you paste an accidental header line, the “ignore invalid lines” option can keep the workflow smooth.

Supports popular grading scales

Different schools use different rules. This tool lets you choose a scale so that validation and optional conversion behave predictably. If your institution uses a variant (like half-grades), simply enter the decimal value—values such as 3.5 or 4.5 are accepted as long as they fit within the chosen range.

The scale selector is also a safety net. It helps catch obvious mistakes like entering 6.0 on a 2–5 university scale, or typing 105 on a percentage scale. Catching these errors early is often the difference between a trustworthy GPA estimate and a misleading one.

Transparent breakdown

A single GPA number is useful, but it can also hide what matters: which courses affected it most. The result section includes a readable summary with total weight, number of entries, and both weighted and simple averages. That makes it easy to double-check the math and confirm that you did not forget a course.

When you are planning, transparency is crucial. If a high-credit course is still pending, you can see how much it might move your GPA by swapping in a target grade and re-running the calculation.

Clear rounding controls

Some systems require rounding to two decimals, others to one, and sometimes you need the full precision to compare scenarios. Select the rounding you need and get the same output every time. The calculator rounds only the final numbers, which aligns with common academic policies and avoids cumulative rounding drift.

If your institution specifies a special rounding method (for example, always rounding down), you can still use this tool for the core calculation and then apply the final rounding rule manually. The important part—getting the weighted fraction correct—remains the same.

Optional “ignore invalid lines” mode

When you paste data from multiple sources, you may have a header line, a note, or an incomplete row. You can choose to ignore invalid rows and still get a result. Skipped lines are listed as warnings so you know exactly what was excluded and can fix the input later if needed.

This is especially useful when you copy from emails, screenshots transcribed to text, or mixed lists where not every item belongs in the GPA calculation (for example, pass/fail seminars).

Exportable output

Copy the result to your clipboard or download it as a text file to attach to a message, keep in your notes, or include as part of a scholarship application checklist. The exported output is plain text, so it can be pasted into a document, a spreadsheet, or a form without formatting surprises.

Use Cases

• Semester GPA — Calculate a weighted semester average where each course has a different credit value.
• Yearly average — Combine semesters or terms with their own weights to keep the overall average consistent.
• Scholarship and honors planning — Estimate whether you meet a GPA threshold, and see how a single course can affect the final number.
• Study abroad documentation — Create a clear numeric summary that you can later convert using the official method required by a destination university.
• Recruitment and internships — Provide a quick GPA snapshot for applications, and keep a personal record of how your GPA changes over time.
• What-if scenarios — Replace a planned grade with a target grade and instantly see how much it moves the weighted average.
• Quick checks for parents and tutors — Compute a student’s weighted average without building a spreadsheet each time.
• Course priority decisions — Identify which high-weight courses offer the biggest GPA improvement if you raise your grade.

A weighted average is especially important when some classes are “bigger” than others—more hours, more credits, or more importance. This calculator keeps the method explicit so you can trust the number you get.

It also helps reduce stress during planning. Instead of guessing whether a single exam will “make or break” your average, you can quantify the effect. Knowing the impact of each weighted component makes goal-setting more realistic and helps you focus on the courses that matter most for your specific program rules.

Optimization Tips

Use credits as weights whenever possible

If your university uses ECTS or another credit system, use the credit value as the weight. That matches how most official GPA calculations are performed and makes your result comparable to institutional transcripts. If you are calculating a partial GPA (for example, only major courses), keep the weights consistent within that subset.

Keep your input consistent and document special rules

Pick one input style—either grade then weight or grade only—and stick to it for a whole paste. If a course has the same weight as most others, it’s fine to omit the weight and let the tool assume 1. When mixing weighted and unweighted entries, remember that weight 1 still affects the result; it just does not amplify the grade as much as a higher-credit course.

Some institutions handle retakes, pass/fail classes, or bonus points in special ways. If your transcript excludes certain categories, keep them out of the input and store them separately. Maintaining an “official GPA set” versus a “personal progress set” is a practical way to keep calculations aligned with policy.

Round only at the end

To avoid rounding drift, enter the original grades (including half grades like 3.5 or 4.5) and round the final GPA. This mirrors typical academic policies and prevents small errors from accumulating. If your school rounds each course grade before weighting (less common), you can replicate it by entering the already-rounded course grades.

FAQ