Calc
FreeMaintained
≈ 151visits/mo
Little sign of use · estimate, read Oct 14, 2026
- For
- Engineers and hobbyists doing RF, LoRa and Meshtastic, homelab networking, solar or PCB design work
- Price
- Freepricing page, read Oct 18, 2026
- Activity
- Maintainedsite updated 6 months ago
- Runs as
- API
- Used for
- Estimate radio link budget and path loss
- Size a dipole antenna for a frequency
- Simulate a SPICE circuit in the browser
- Used more than 62% of the 694 tools on its shelfINITE Atlas →
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantscalc.engineer ↗
Free
- MCP serverengineer.calc/calcverified in the MCP registry
- Stateanswers, 89 toolschecked 2026-10-18
- Address to connectcalc.engineer/mcp
- API docscalc.engineer/apithe vendor's page ↗
- MCP docscalc.engineer/mcpthe vendor's page ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
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Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use Calc for?
Sign in to leave a noteWhat is Calc?
Browser-based calculators for RF link budgets, LoRa airtime, ZFS capacity and PCB traces, plus a SPICE circuit simulator. It is listed in the Atlas under Finance.
Who is Calc for?
Engineers and hobbyists doing RF, LoRa and Meshtastic, homelab networking, solar or PCB design work
How much does Calc cost?
Calc is free, per its pricing page on 2026-10-18.
Is Calc free?
Yes: Calc is free, per its pricing page on 2026-10-18.
Do people use Calc?
Little sign of use: ≈ 151 visits/mo · estimate, 2026-10.
Is Calc still maintained?
Maintained: site updated 6 months ago.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk