CountBusinessDays was built to provide a quick, powerful, accurate and private date-calculating website. We calculate business days and calendar days while respecting US or Canadian holidays and any custom holidays the user may have. It includes: • Count business or calendar days between dates • Add or subtract business days • Invoice age & Net-term due dates • Remaining business days this month/quarter/year • Cascading deadlines & fiscal year tools • ISO week calculator • Custom holidays (saved only in your browser) Supports U.S. Federal and Canadian holidays with correct observed dates. No account required, works entirely in your browser, and includes dark mode. Built for project managers, accountants, freelancers, and anyone who needs accurate working-day calculations without spreadsheets.

CountBusinessDays.com

Privacy-friendly business days calculator (no signup)

Privacy-friendly business days calculator (no signup)