Productivity
Concrete Calculator
Last updated 2026-06-28 · benchmark checked 2026-08-09 · unchanged since 2026-08-08 — deterministic & reproducible
Free online calculators for estimating concrete volume across common pour types.
Is Concrete Calculator production-ready?
Legit.Show scores Concrete Calculator 86 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Concrete Calculator (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 — 99/100
- Accessibility — 85/100
- Security — 45/100
- Privacy — 100/100
- Reliability — 100/100
- Standards — 85/100
- Discoverability — 87/100
What we measured
- Security headers present: CSP.
- No HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 1243 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 built it
Hasnain Graphics
Who it's for
DIYers · Contractors · Construction professionals · Engineers
Pricing
100% Free
Visit Concrete Calculator → · Alternatives to Concrete Calculator → · How this was measured →