Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Annual cost
$215,280
Team hours lost
3312
Hours lost per person
552
Workdays per person
69.0
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter interruptions per day.
- 2Enter recovery time each (min).
- 3Enter loaded hourly rate ($).
- 4Enter people affected.
- 5Enter working days per year.
- 6Read your annual cost on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Every interruption costs the interruption plus the recovery time. This totals the productive hours lost per person per year and prices them.
Worked example
Using the values the calculator loads with:
Inputs
- Interruptions per day: 12
- Recovery time each: 12 min
- Loaded hourly rate: 65 $
- People affected: 6
- Working days per year: 230
Results
- Annual cost: $215,280
- Team hours lost: 3,312
- Hours lost per person: 552
- Workdays per person: 69
What each field means
Inputs
- Interruptions per day
- The interruptions per day used in the calculation. Starts at 12 so you have a working example on load.
- Recovery time each (min)
- The recovery time each used in the calculation, measured in min. Starts at 12 min so you have a working example on load.
- Loaded hourly rate ($)
- The loaded hourly rate used in the calculation, measured in $. Starts at 65 $ so you have a working example on load.
- People affected
- The people affected used in the calculation. Starts at 6 so you have a working example on load.
- Working days per year
- The working days per year used in the calculation. Starts at 230 so you have a working example on load.
Results
- Annual cost
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Team hours lost
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Hours lost per person
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Workdays per person
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the context switching cost calculator work?
Every interruption costs the interruption plus the recovery time. This totals the productive hours lost per person per year and prices them. The underlying maths is: Hours = interruptions × recovery minutes × days ÷ 60 × people.
What do I need to enter?
5 values: interruptions per day, recovery time each, loaded hourly rate, people affected, and working days per year. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the annual cost result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Context Switching Cost Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/context-switch-cost
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/context-switch-cost" target="_blank" rel="noopener">Context Switching Cost Calculator — RevenueLab</a> (2026).</p>
Source: [Context Switching Cost Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/context-switch-cost) (2026).