Productivity
calculatorsonline.co.uk
Last updated 2026-07-13 · benchmark measured 2026-07-13 — deterministic & reproducible
A free collection of 700+ online calculators built for UK users.
Overall production-readiness score — reserved
Legit.Show benchmarked calculatorsonline.co.uk across all seven frames. The single overall score is shown to the verified maker; the frame-by-frame breakdown is public below.
Is calculatorsonline.co.uk production-ready?
Legit.Show ran its deterministic 7-Frame production-readiness benchmark on calculatorsonline.co.uk (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Privacy; its weakest is Security. The per-frame breakdown is public on the Legit.Show listing; the single overall production-readiness score is reserved for the verified maker.
The 7 Frames
- Performance — 74/100
- Accessibility — 93/100
- Security — 45/100
- Privacy — 100/100
- Reliability — 100/100
- Standards — 70/100
- Discoverability — 87/100
What we measured
- Security headers present: CSP.
- No HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 3857 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Discoverable: structured data, sitemap, canonical URL.
Who it's for
UK users · Students · Finance planners · Engineers · General public
Pricing
Free