Grade Calculator
Open Grade Calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.
Tool capabilities
{
"id": "grade-calculator",
"category": "education-tools",
"built": true,
"requirements": "Weighted and point-based grades; editable thresholds and no implied universal grading system.",
"implementation": {
"fields": [],
"note": "One score,weight pair per line. For GPA use numeric grade points and course credits.",
"experience": {
"automatic": true,
"single": false,
"inputMaxLength": 1000000,
"inputMode": "text",
"label": "Scores and weights",
"placeholder": "80,1\n90,1",
"help": "Add one score,weight pair per line. Use the same score scale throughout. Results update as you type. Up to 1,000,000 characters.",
"helpParts": [
"Add one score,weight pair per line. Use the same score scale throughout.",
"Results update as you type.",
"Up to 1,000,000 characters."
],
"action": null
},
"mode": "automatic",
"interactive": false
},
"execution": "POST /api/v1/tools/grade-calculator/run",
"api": {
"id": "grade-calculator",
"name": "Grade calculator",
"category": "education-tools",
"description": "Calculate a weighted average from scores and their weights.",
"notes": "One score,weight pair per line. For GPA use numeric grade points and course credits.",
"human_path": "/en/education-tools/grade-calculator/",
"method": "POST",
"endpoint": "/api/v1/tools/grade-calculator/run",
"schema_url": "/api/v1/tools/grade-calculator",
"input_schema": {
"type": "object",
"additionalProperties": false,
"properties": {
"input": {
"type": "string",
"maxLength": 1000000,
"default": "",
"description": "Plain text input. File tools use files instead unless otherwise documented."
},
"options": {
"type": "object",
"additionalProperties": false,
"properties": {}
}
}
},
"output_schema": {
"type": "object",
"required": [
"tool",
"result"
],
"properties": {
"tool": {
"type": "string"
},
"result": {
"type": "object",
"required": [
"text",
"files"
],
"properties": {
"text": {
"type": [
"string",
"null"
]
},
"data": {
"description": "Parsed JSON when the textual result is JSON."
},
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"files": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"mime",
"bytes",
"base64"
],
"properties": {
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"bytes": {
"type": "integer"
},
"base64": {
"type": "string",
"contentEncoding": "base64"
}
}
}
}
}
}
}
},
"processing": "Server; same transformation code as browser tools",
"limits": {
"request_bytes": 8388608,
"input_characters": 1000000,
"files_bytes": 5242880,
"max_files": 0,
"timeout_seconds": 12
}
},
"agent_processing": "Server; same transformation code as browser tools",
"browser_agent": {
"supported": true,
"name": "run_current_tool",
"discovery": "WebMCP on the human page in a supporting browser",
"verification": "See audit/API-AUDIT.md; availability is not verification"
}
}Page guide
Calculate a weighted average from scores and their weights.
How to use Grade calculator
- Enter your text in the input field.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
How Grade calculator works
The grade calculator finds a weighted average from score,weight pairs, one per line. It multiplies each score by its weight, adds the results and divides by the total weight, so weights do not need to add up to 100. Use any score scale, such as percentages or points out of 10, as long as every line uses the same one. The result is rounded to 12 significant digits and calculated in your browser. It does not convert the average to a letter grade.
Before you start
Find the weight of each assignment or category in your syllabus and convert every score to the same scale. Enter numbers only, without percent signs.
A worked example
Entering 85,20 then 92,30 then 78,50 (a quiz average, a midterm and a final weighted 20, 30 and 50 percent) gives a weighted average of 83.6.
What to expect
Calculate a weighted average from scores and their weights. Enter one score,weight pair per line. Weights can be percentages or relative values, provided they use a consistent scale. At least one weight must be positive.
Common questions
How do you calculate a weighted grade?
Multiply each score by its weight, add the products and divide by the sum of the weights. For 85 at 20, 92 at 30 and 78 at 50, the products are 1700, 2760 and 3900, totaling 8360. Dividing by 100 gives 83.6, the same result the calculator shows.
What if my weights do not add up to 100?
That is fine. The calculator divides by whatever the weights total, so 1,1 lines give a plain average and 2,1 lines count the first score twice as much. This also means you can enter only the categories graded so far to see your current standing.
How do I find my current grade before the final?
Enter only the categories that already have scores, with their syllabus weights. If your quizzes, worth 20 percent, average 85 and your midterm, worth 30 percent, is 92, enter 85,20 and 92,30. The result, 89.2, is your average on completed work, not your final course grade.
Why do I get an error when I enter 85%?
Each line must contain two plain numbers separated by a comma. A percent sign, a letter grade or an empty line between rows is rejected. Type 85,20 rather than 85%,20%, and make sure at least one weight is greater than zero.