# Calculator for Grading Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Calculator for Grading

Calculate test grades, final exam targets, weighted course grades, GPA, and standardized test scores.

- Record: https://musedirectory.ai/connector/calculator-for-grading
- Category: Productivity
- Developer: calculatorforgrading.com (https://calculatorforgrading.com/ai-assistants/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 73ms, checked 2026-10-29T22:46:38Z
- Endpoint: https://calculatorforgrading.com/mcp?src=mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-29T22:46:38Z)
- Source: Found in the official MCP Registry (com.calculatorforgrading/calculatorforgrading) https://registry.modelcontextprotocol.io/v0/servers?search=com.calculatorforgrading%2Fcalculatorforgrading

Converts test performance into letter grades and percentages. Calculates what final exam score a student needs to reach a target grade, weighted course grades from multiple categories, GPA from letter grades and credits, and scores from SAT, ACT, and MCAT practice tests.

Example request: "I got 7 questions wrong on a 40-question test, what's my grade?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Calculator for Grading to help me. It is a free service with an MCP server at https://calculatorforgrading.com/mcp?src=mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- grade_calculator: Use this when a student or teacher wants the percent and letter grade for a test from the number of questions wrong (or correct), e.g. "7 wrong out of 40". Returns the percent, the letter on the chosen scale, how many more correct answers reach the next letter, and optionally a c
- final_grade_needed: Use this when a student asks what score they need on a final exam (or last assignment) to reach a target grade, given the current grade and how much the final counts. Returns the needed percent, whether it is secured or out of reach, what a 0 and a 100 would leave, and the need f
- weighted_grade: Use this when a student wants the weighted course grade from categories such as homework 20%, tests 50%, final 30%. Each row has a score (percent, a fraction like 45/50, or a letter) and a weight; rows without a score count as still open. Returns the weighted average, the letter,
- gpa_calculator: Use this when a student wants their GPA from letter grades and credits, high school (honors +0.5, AP/IB +1.0 on passing grades, weighted and unweighted) or college (credit hours, unweighted). Returns unweighted and weighted GPA with the points of each course. Credits default to 1
- test_score_calculator: Use this when a student wants a score from a published practice test: SAT (College Board digital practice tests 4-11, correct answers per section to score ranges), ACT (practice tests 1-4 and the National test, correct answers per section to scale scores and Composite) or MCAT (f
- grading_scale_facts: Use this when someone asks what a grading scale is: the 10-point scale (A 90-100), the 7-point scale (A 93-100), the plus-minus scale with GPA points on 4.0 and 4.3, or the College Board percent-to-GPA table. Returns the cut-offs, the named sources and the date they were checked.

Screening checks:
- MCP handshake: pass (Answered in 73ms)
- Domain against threat feeds (Cloudflare security DNS): pass (calculatorforgrading.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (6 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 22 days ago)
- AI review of purpose and tool behavior: pass (No concerns)