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期末成绩计算器.

计算期末考试需要达到的分数以获得目标成绩

设备端计算无需注册
01

输入数值

输入时结果会更新。

输入目前已完成的课程百分比

期末考试需要的分数: 101.7%

期末考试需要的分数

Not achievable
101.7%
才能达到 90% (A-) — 很遗憾，这个目标无法实现。 最高可能: 89.5%
如果你在期末考试得 0%: 59.5% F

如果你在期末考试得 0%

59.5%F
如果你在期末考试得 100%: 89.5% B+

如果你在期末考试得 100%

89.5%B+

达到目标分数所需成绩

B+
>= 87%
91.7%
所需
B
>= 83%
78.3%
所需
B-
>= 80%
68.3%
所需
C+
>= 77%
58.3%
所需
C
>= 73%
45.0%
所需
C-
>= 70%
35.0%
所需

计算原理

简单: 使用当前成绩、已完成权重、期末考试权重和目标成绩，计算期末需要取得的分数。
加权: 输入每个类别的成绩与权重。将期末考试成绩留空以计算所需分数。
公式：需要的分数 = (目标成绩 - 当前成绩 × (1 - 权重)) ÷ 权重: 示例：如果你当前成绩80%，目标85%，期末考试占30%，则需要：(85 - 80 × 0.7) ÷ 0.3 = 96.7%

使用方法

简单: 使用当前成绩、已完成权重、期末考试权重和目标成绩，计算期末需要取得的分数。

加权: 输入每个类别的成绩与权重。将期末考试成绩留空以计算所需分数。

Cite this calculator

Canonical URL: https://mathify.one/zh/education/final-grade

Cite as: Mathify. (2026). 期末成绩计算器. https://mathify.one/zh/education/final-grade

Use Cases

Plan your study strategy

Determine the minimum score needed on your final to pass or achieve a desired grade, helping you prioritize study time.

Example: If you have an 85% and the final is worth 30%, you can find out if you need a 90% to get an A.

Set realistic goals

See if your target grade is achievable given your current performance and the final's weight.

Example: If you need a 95% on the final but you've been scoring 70s, you might adjust your target.

Frequently Asked Questions

How does the final grade calculator work?
It uses your current grade, the weight of your current grade, the weight of your final exam, and your target grade to calculate the minimum score you need on the final. The formula is: required final score = (target grade - (current grade * current weight)) / final weight.
What if my final exam is worth 20% of my grade?
Enter 20 as the final weight. The calculator will use that percentage to determine how much your final exam can affect your overall grade. A higher final weight means the exam has a bigger impact on your final grade.
Can I use this calculator for any course?
Yes, as long as you know your current grade, the weight of your current grade (usually the percentage of your grade already earned), the weight of the final exam, and your target grade. It works for any course that uses a weighted grading system.

Tips & Common Mistakes

Tips

  • Double-check that the weights you enter add up to 100% (or the correct total) to get an accurate result.
  • If your current grade includes all graded work so far, use the weight of that work as the current weight.
  • Use the calculator before your final to see how much you need to study, and after to see what you actually need if your grade changes.
  • Remember that the result is the minimum score needed; aim higher to account for any grading surprises.

Common Mistakes to Avoid

  • Entering the current grade as a decimal (e.g., 0.85) instead of a percentage (85).
  • Using the final exam's weight as the current weight, or vice versa.
  • Forgetting to include the target grade as a percentage, not a decimal.

Last updated: August 13, 2026