Free online calculators & tools that show their working
Free, accurate calculators for the grade questions students and teachers actually ask — built around the exact formulas your school uses, with worked examples on every page — plus practical tools for online sellers. The calculators run entirely in your browser: nothing you type is sent anywhere.
Featured calculators
- GradesFinal Grade Calculator
Enter your current grade, the grade you want, and how much your final is worth — get the exact score you need.
Students before finals
- GradesEZ Grader / Test Grade Calculator
Type total questions and how many were wrong — get the percentage and letter grade instantly, with a full printable grading chart.
Teachers and students
- GPA & DegreesUK Degree Classification Calculator
Credit-weighted module marks plus your year weighting (0/100, 25/75, 33/67, 40/60) — get your estimated classification and borderline status.
UK university students
- GPA & DegreesCumulative GPA Calculator
Add this semester’s courses to your existing GPA and credits and see your new cumulative GPA, calculated from quality points.
College students
- GPA & DegreesTarget / Raise GPA Calculator
Enter your current GPA, credits done, credits to go and your target — see the exact average you need, and whether it is still possible.
Students raising their GPA
- GradesWeighted Grade Calculator
Categories with weights, raw points, or a Q1/Q2/final semester split — three modes, one accurate weighted grade.
Students and teachers
Shopify Product Extractor — our newest tool
Selling online instead of studying? Our Shopify Product Extractor copies products from compatible online stores — Shopify, WooCommerce, Salesforce stores such as Khaadi and Sapphire, and custom stores — and prepares a Shopify-ready CSV without manual copy-pasting. Paste a product link, a collection, or a whole store homepage, review the results, and download the file.
- 96Shopify CSV columns, exactly matched
- 5+Platform families supported
- 100Products per collection or store
- FreeNo account, no watermark, no catch
Open the Product Extractor Read the extractor guide
How it works
1. Enter your numbers. Your current grade, credits, or test scores — each calculator explains where to find them (usually your syllabus and gradebook).
2. See the formula, not just the answer. Every page shows the exact method, so you can check the result by hand and understand *why* — including the cases where a target is already secured or mathematically out of reach.
3. Plan with honest results. Our tools tell you plainly when something is impossible and what your realistic ceiling is, instead of printing a meaningless number like “you need 162%”.
Why trust these calculators?
Each calculator’s maths is implemented as tested code with boundary and edge-case checks — grade replacement, drop-lowest rules, borderline UK classifications, half-point grading and credit weighting are all handled deliberately, not approximated. Results are planning estimates: your institution’s official rules always prevail, and every page says so.
Latest guides
- How EZ Grading Scales Work (and Which One Your School Uses)
The sliding-scale maths behind EZ graders: 10-point and plus/minus scales, rounding policies that change letter grades, and half-point grading.
- Semester Grades Explained: How the 40/40/20 Split Works
Many schools build a semester grade from two quarters and a final weighted 40/40/20. How the split works, other common splits, and worked examples.
- What to Do If You Need Over 100% on Your Final
Needing over 100% on a final feels like a disaster. It’s actually clear information: check the maths, find your real ceiling, and use your options.