複数のGoogleカレンダーを混乱なく管理する方法
· Norimitsu Shida · Kiruck Inc.
要点
If you have multiple Google accounts (personal, work, freelance, advisory), you have 4 options: manual browser switching, calendar sync (copies events between accounts), calendar aggregation (reads free/busy without copying), or a purpose-built scheduling tool. The right choice depends on whether you need a unified view, booking links, or both. Tenbin supports up to 10 Google accounts at $10/month base (2 included) + $3 per extra account, with booking in 5 languages (EN/JA/ES/DE/FR).
Why do people have multiple Google calendars?
Separate work and personal accounts; different companies (freelancer, consultant, fractional executive); different countries with separate entities; advisory boards and side projects. The average fractional professional manages 3–5 Google accounts. Up to 10 accounts can be connected in Tenbin for $10/month base + $3 each additional.
Method 1 — Manual browser profile switching
How it works: Chrome profiles, one per Google account. Pros: free, no third-party access. Cons: tab overload, mental merging, no unified view, double-booking risk. Best for 2 accounts with low meeting volume.
Method 2 — Calendar sync tools (CalendarBridge, OneCal)
How it works: copy events between accounts for a unified view. Pros: unified view across Google, Outlook, iCloud on some tools. Cons: event data duplicated, privacy considerations; does not by itself solve public booking. Pricing examples: CalendarBridge from about $4/month; OneCal from about $5/month. See our comparisons: /blog/tenbin-vs-calendarbridge and /blog/tenbin-vs-onecal.
Method 3 — Calendar aggregation (Tenbin approach)
How it works: read free/busy only — no event copying. Pros: minimal data exposure; real-time availability for booking. Cons: not a unified “see every event title” view — it is scheduling-first. Best when you need one booking link across accounts. Read: /blog/what-is-calendar-aggregation.
Method 4 — Traditional scheduling tools (Calendly, etc.)
How it works: one booking link per scheduling account. Limitation: Calendly is typically one email identity per account — fragmented for multi-company Google users. See /blog/tenbin-vs-calendly.
Which method is right for you?
Decision guide: 2 accounts, few meetings → manual. Need unified view across providers → sync (CalendarBridge/OneCal). Need booking links across multiple Google accounts → aggregation (Tenbin). Single-company team scheduling → traditional tools like Calendly.
| Your situation | Best method |
|---|---|
| 2 accounts, few meetings | Manual |
| Need unified view, multiple providers | Sync (CalendarBridge/OneCal) |
| Need booking links, multiple Google accounts | Aggregation (Tenbin) |
| Single company, team scheduling | Traditional (Calendly) |
FAQ
Google Calendar can display sub-calendars within one account, but cannot natively aggregate availability across separate Google accounts. You need a third-party tool for cross-account visibility and booking.