퍼센트 계산기
참석자 수, 급여, 지속 시간을 기반으로 실시간 비용 타이머로 회의의 실제 비용을 계산하세요.
이 도구에 대해
급여 시간에서 회의 비용이 정확히 얼마인지 알아보세요. 개별 시간당 요금으로 참석자를 추가하거나 단일 평균 요금을 사용한 후 실시간 타이머를 시작하여 실시간으로 비용이 누적되는 것을 확인하세요. 회의 비용과 예상 결과 가치를 비교하여 회의가 개최할 가치가 있는지 판단하세요.
사용 방법
- 1 빠른 설정 섹션에서 이름과 시간당 요금으로 참석자를 추가하거나, 평균 시간당 급여와 함께 인원 수를 입력하세요.
- 2 계획된 회의 지속 시간을 설정하세요(또는 실시간 타이머에만 의존하려면 비워 두세요).
- 3 '회의 시작'을 클릭하여 실시간 비용 시계를 실행하고 총 비용이 누적되는 것을 확인하세요.
- 4 '이것이 가치 있는가?' 섹션에 예상 결과 가치를 입력하여 투자 수익률 비율을 확인하세요.
Putting a dollar figure on a meeting
Meetings feel free because no one writes a cheque to attend one — but every minute people sit in a room is paid for in salary. This calculator makes that hidden cost visible. You enter how many people are attending, their average hourly rate, and the planned length, and it shows the cost per minute, the projected total, and — once you press start — a live counter that ticks upward in real time as the meeting runs. Displaying a number that climbs while people talk is a surprisingly effective way to keep a discussion focused.
The arithmetic behind it
The core calculation is deliberately transparent. The tool sums every attendee's hourly rate to get a combined hourly cost, divides by 60 for a per-minute rate, and multiplies by the number of minutes:
- Cost per minute = (sum of hourly rates) ÷ 60
- Planned cost = cost per minute × planned duration
- Live cost = cost per minute × minutes elapsed so far
In quick-setup mode every attendee is assumed to earn the same rate, so the combined hourly cost is simply headcount × rate. If you switch to the Custom Attendees list and give people individual rates, that list takes over and the sum reflects each person's real pay — which is realistic, because a meeting with three engineers and a director costs more than four interns.
A worked example
Five people, an average rate of $60/hour, scheduled for 60 minutes. Combined hourly cost is 5 × 60 = $300. Cost per minute is 300 ÷ 60 = $5.00. The planned cost for the full hour is $5.00 × 60 = $300.00. Press Start Meeting and after the clock reaches 18 minutes the live cost reads $5.00 × 18 = $90.00. If that same meeting runs 12 minutes over, the overrun alone costs another $60 — the kind of figure that justifies ending on time.
The "is this meeting worth it?" check
Enter an estimated dollar value for the meeting's outcome — a decision made, a deal advanced, a problem solved — and the tool divides that value by the cost so far to produce an ROI ratio. A ratio of 2× or more reads as "definitely worth it", at least 1× as "worth it", between 0.5× and 1× as "borderline", and below that as "probably not worth it". The numbers are a rough prompt for judgement, not an accounting standard, but they reframe the question usefully: a one-hour status meeting for eight senior people needs to produce real value to clear its own cost.
Use cases
- Pre-meeting reality check. Type the headcount and length before you send the invite; if the projected cost shocks you, trim the guest list or shorten the slot.
- Live timekeeping. Share your screen with the running counter visible so the group sees the cost accumulate — a gentle, blameless nudge to stay on agenda.
- Recurring-meeting audits. Multiply the per-occurrence cost by how often a standing meeting repeats to expose its true annual price.
- Mixed-seniority meetings. Use custom attendees to model the real cost when executives and junior staff are in the same room.
Tips and common mistakes
- Use fully loaded rates. Salary alone understates cost. A rough rule of thumb is to multiply base hourly pay by about 1.25–1.4 to cover benefits, taxes, and overhead, so the figure reflects what an employee truly costs the business.
- Count preparation and context-switching. The tool measures time in the room, but a meeting also pulls people out of focused work. The displayed number is a floor, not a ceiling.
- Custom attendees override quick setup. Once you add even one custom person, the headcount and average-rate boxes are ignored. Clear the custom list to go back to quick mode.
- The live timer needs the tab open. It runs in your browser; the elapsed clock counts from when you press start and pauses when you press pause.
All calculations happen locally in your browser — nothing about your team, rates, or meetings is uploaded or stored on a server.