Last updated: July 2026
Free, no-signup timezone tools for distributed teams.
TimeSyncis a free timezone overlap planner. Add your team members by city, pick a date, and the planner shades each person's working day on a shared 24-hour timeline. The highlighted band shows exactly where everyone's hours overlap, no arithmetic required.
Share links encode your full team configuration in the URL so colleagues can open the same view without creating an account. The standup rotation planner finds the least-painful recurring time and generates a rotation so no region always takes the awkward slot. The city pairs directory provides pre-computed overlap facts for 300+ common city combinations.
Working-hours model. Each person has a configurable work window (default 9 AM–5 PM local time). The planner computes overlap at 5-minute resolution across all team members simultaneously. A slot is highlighted only when every person is within their stated working hours.
Pain scoring for standup rotation. When no perfect overlap exists, the standup planner scores every half-hour slot across the team. Each person receives one of four labels for a given slot:In hours (score 0), Early (score 1), Late (score 1), or Asleep(score 3: any hour before 7 AM or after 10 PM local). The slot with the lowest total score is recommended first. The rotation generator then finds one slot per team member where that person's region is “in hours,” spreading the inconvenience fairly.
IANA timezone data via Luxon. All UTC offsets and DST transitions are computed at runtime using the Luxon library, which bundles the IANA timezone database. Offsets are evaluated at local noon on the selected date rather than midnight to avoid edge cases around DST transitions. Half-hour zones (India, UTC+5:30) and 45-minute zones (Nepal, UTC+5:45) are handled natively. Pair-page overlap figures are computed at build time for the build date; use the interactive planner for any specific future date.
Distributed engineering and design teams, remote-first companies coordinating across regions, freelancers scheduling calls with international clients, and anyone who has ever mentally converted time zones at 11 PM and gotten it wrong.
The effective hourly rate is computed as salary ÷ (workingWeeks × hoursPerWeek). Working weeks = 52 minus unpaid weeks. The “naive” rate uses 52 × 40 = 2,080 hours. All math runs client-side; no data leaves your browser.
We apply a 1.25× overhead multiplier (covering IRS self-employment tax at 15.3%, equipment depreciation, and software subscriptions — sourced from BLS benefits cost estimates 2024) and a 1.15× benefits premium (health insurance + retirement). The recommended rate adds a 15% buffer above the minimum. Assumptions last reviewed January 2025.
US benchmark salaries are sourced from Levels.fyi and Glassdoor 2024 survey data. Country-specific market multipliers reflect rates from Toptal, Upwork, and local job boards (Naukri, JobStreet, No Fluff Jobs, DOU.ua, and others). The displayed range is ±15% around the market midpoint. Data last reviewed January 2025.
Cost = attendees × hourlyRate × (durationMinutes ÷ 60). Annual cost uses actual occurrences per year: once = 1, daily = 260, weekly = 52, biweekly = 26, monthly = 12. FTE-days equivalent = annual person-hours ÷ 8.
Weekly hours per meeting: daily = 5×duration, weekly = 1×, biweekly = 0.5×, monthly = 0.23× (52÷12÷2). Load classification thresholds (Light/Moderate/Heavy/Extreme) are based on published knowledge-worker productivity research on deep-work requirements.
We implement the rolling 180-day window algorithm exactly as specified in Regulation (EU) No 610/2013. For each target date, we look back 180 calendar days and count days inside the Schengen Area. Entry day counts; exit day does not. Safe-exit dates are computed by finding the earliest future date where the rolling count drops below 90.
We count calendar days present per country within the selected tax year (January 1 – December 31). The 183-day threshold is a commonly used heuristic; actual rules vary by country and tax treaty. This tool tracks days only — it is not a substitute for professional tax advice.
All calculations run entirely in your browser. No data is sent to any server. Rate and compensation data is updated periodically; see individual tool pages for last-reviewed dates.