# Circumference to Diameter Calculator alternatives

Source: https://freeaidirectories.com/tools/circumference-to-diameter-calculator/alternatives

Alternatives are selected by shared category and pricing model, not by editorial ranking. Listings marked Featured are paid placements.

- [Zene Ai](https://freeaidirectories.com/tools/zene-ai): AI-powered learning for future-ready students (Freemium · Education & Learning)
- [Praxena](https://freeaidirectories.com/tools/praxena): Independent French-language reviews and comparisons of AI tools (Free · Education & Learning)
- [Quizbot](https://freeaidirectories.com/tools/quizbot): AI-powered quiz, exam, and study material generator for teachers and students. (Free · Education & Learning)
- [Cgpa2percent](https://freeaidirectories.com/tools/cgpa2percent): Free CGPA to Percentage Converter — Accurate, Instant, No Signup (Free · Education & Learning)
- [AnyAIZero](https://freeaidirectories.com/tools/anyaizero): Free AI humanizer + detector. Make AI text sound human. No signup, 3,000 words daily. (Free · Writing & Copywriting)
- [ProxyCroxy](https://freeaidirectories.com/tools/proxycroxy): Fast, Secure & Private Web Access (Free · Security & Privacy)
- [AdmissionsOS](https://freeaidirectories.com/tools/admissionsos): AdmissionsOS is an AI college counselor built by Ivy League counselors and MIT engineers... (Education & Learning)
- [NyvoraAi](https://freeaidirectories.com/tools/nyvoraai): Mr. Varun Lalwani is the founder of NyvoraAI, a platform dedicated to making artificial... (Education & Learning)
- [Launchvault](https://freeaidirectories.com/tools/launchvault): LaunchVault is a free, organized library of 1,500+ AI lessons written in plain English for... (Education & Learning)
- [AI Study Sheet](https://freeaidirectories.com/tools/ai-study-sheet): Study from your own textbooks, notes and PDFs with adjustable AI masks on iPhone and iPad. (Freemium · Education & Learning)
- [Face Swap AI](https://freeaidirectories.com/tools/face-swap-ai): Free online AI face swap tool for photos, videos, and GIFs with fast and realistic results. (Free · AI Agents)
- [Deep Swap AI](https://freeaidirectories.com/tools/deep-swap-ai): AI-powered face swap and creative media editing platform for videos, photos, and GIFs in seconds. (Free · AI Agents)

[See all 16 Education & Learning tools](https://freeaidirectories.com/categories/education-learning)

Back to [Circumference to Diameter Calculator](https://freeaidirectories.com/tools/circumference-to-diameter-calculator).

Updated: 2026-10-03