About
About (中文) – The fastest, most accurate online grade calculator suite. Calculate course averages, final exam score requirements, weighted categories, and GPA on a 4.0 scale with 100% privacy.
关于我们 – 成绩计算器
At Grade Calculator (gradecalculator.dev), we empower students, educators, and parents worldwide with fast, transparent, and mathematically rigorous academic calculation tools. Calculating semester averages, final exam score targets, and cumulative GPA should never require confusing spreadsheets or ad-cluttered websites that lag on mobile devices.
Our suite of 15+ calculators is built on modern web standards to ensure instant client-side execution, 100% browser-based data privacy, and zero server storage of personal grades.
Mathematical Rigor
Every calculation formula—from weighted harmonic contributions to decimal quality points—is verified and tested against standard institutional benchmarks.
Privacy-First Architecture
We never store, transmit, or monetize your coursework grades. All calculations execute directly in your browser's JavaScript runtime.
Always Free & Accessible
No paywalls, no forced logins, and no intrusive popups. Built to conform to modern WCAG accessibility guidelines.
Academic Community & Updates
Follow Grade Calculator across our official community channels for study tips, grading insights, and calculator releases.
标准学术评分量表
百分制得分、字母等级与 4.0 GPA 质量绩点对照转换表。
标准学术评分量表
评分标准| 等级评定 | 百分比区间 | GPA 绩点 (4.0 标准) | 学术表现状态 |
|---|---|---|---|
| A+ | 97% – 100% | 4.0 | 荣誉等级 |
| A | 93% – 96% | 4.0 | 荣誉等级 |
| A- | 90% – 92% | 3.7 | 荣誉等级 |
| B+ | 87% – 89% | 3.3 | 优秀达标 |
| B | 83% – 86% | 3.0 | 优秀达标 |
| B- | 80% – 82% | 2.7 | 优秀达标 |
| C+ | 77% – 79% | 2.3 | 优秀达标 |
| C | 73% – 76% | 2.0 | 优秀达标 |
| C- | 70% – 72% | 1.7 | 优秀达标 |
| D+ | 67% – 69% | 1.3 | 仍需努力 |
| D | 63% – 66% | 1.0 | 仍需努力 |
| D- | 60% – 62% | 0.7 | 仍需努力 |
| F | < 60% | 0.0 | 仍需努力 |
热门学生计算工具
助您科学规划学期进度、精准把控学分绩点的专业计算工具。
成绩计算器
Calculate overall percentages, total points earned, and letter grades across all your coursework.
期末考试成绩计算器
Find out the exact score needed on your final exam to pass the class or earn your desired letter grade.
加权成绩计算器
Compute course grade when assignments, quizzes, midterms, and finals carry distinct category percentages.
4.0 GPA 绩点计算器
Calculate high school and college grade point averages with credit hour weighting.
平均分计算器
Calculate the mathematical mean, median, highest, and lowest score across any set of grades.
测验评分表计算器
Instant grading chart and test score checker for students and teachers.