Productivity
ProCalcTools
Last updated 2026-07-19 · benchmark checked 2026-08-09 · unchanged since 2026-07-19 — deterministic & reproducible
Free online calculators for finance, health, and everyday math needs.
Is ProCalcTools production-ready?
Legit.Show scores ProCalcTools 95 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on ProCalcTools (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Privacy; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 94/100
- Accessibility — 96/100
- Security — 80/100
- Privacy — 100/100
- Reliability — 100/100
- Standards — 93/100
- Discoverability — 100/100
What we measured
- Security headers present: CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- No HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 694 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Americans · Financial planners · Health-conscious users · Students · Homeowners
Pricing
Free
Visit ProCalcTools → · Alternatives to ProCalcTools → · How this was measured →