Terms

Last updated: 16 June 2026

Use of Trefid

Trefid provides calculators and tools for general informational use. You may use the site for personal or business reference, provided you do not misuse the service or attempt to interfere with its operation.

Calculator results

Calculator outputs are estimates based on the values entered. Results should be checked before relying on them for important decisions, records, payments, deadlines, or submissions.

No professional advice

Nothing on Trefid is financial, legal, tax, medical, engineering, or other professional advice. If a calculation affects an important decision, consult the relevant official source or a qualified professional.

Sources and updates

Some calculators use public rates, thresholds, or common formulas. These may change over time. Trefid may update calculator wording, defaults, source links, or formulas when a page is reviewed, but you remain responsible for checking important results against current official or professional sources.

Advertising and external links

Trefid may display advertising on calculator and content pages. External links are provided for reference and do not mean Trefid controls or endorses the linked site. Ads and external websites may have their own terms and privacy practices.

Misuse

You must not try to interfere with the site, scrape it in a way that harms service availability, inject malicious code, or use the site in a way that misleads other visitors.

Availability

We aim to keep Trefid available and accurate, but we do not guarantee uninterrupted access, error-free calculations, or that every tool will suit every use case.

Contact

For enquiries, corrections, or feedback, contact hello@trefid.com.