Seasonal capacity calculator
Your capacity is not the problem in January and it is not the problem in July. The problem is that they are not the same month, and you need to plan for both.
January and November are not the same month. Plan for both.
decodedops.co.uk · DO-ART-994 · Rev 01Set your baseline, then drag the months.
Start with your weekly capacity from the capacity planner. Set your baseline weekly output. Then adjust each month's demand percentage to match your seasonal pattern — 100% is your baseline, higher is peak, lower is quiet. The calculator shows you exactly where the gaps land.
Weekly capacity
Your real output per week, from the capacity planner.
Baseline weekly jobs
What you produce in a normal, non-peak month.
Seasonal demand
Drag each month up or down. 100% = baseline.
Your baseline
Your steady-state output per week. Use the capacity planner to calculate this if you haven't.
Your output in a normal month. All months start at 100% (flat). Adjust each month to match your seasonal pattern.
Seasonal demand by month
100% = your baseline. Drag up for peak months, down for quiet ones.
Your seasonal picture
Peak weekly demand
200 jobs
Lowest weekly demand
200 jobs
Months over capacity
0 of 12
The months where you have capacity but not the demand to fill it.
Monthly view
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The two costs of getting this wrong
Over-capacity — you hire, you invest, you take on overhead, and then January is quiet. The machines sit, the staff are under-utilised, and you carry the cost until the next peak. This is the expensive mistake because it is hard to reverse.
Under-capacity — you cannot fulfil orders during peak, so you turn work away, rush jobs through quality, or pay overtime to close the gap. This is the visible mistake. The cost is lost revenue and damaged reputation, but it does not show up on a balance sheet the same way.
The right answer is usually a mix of both — over-invested in some months, under-resourced in others. Mapping the year visually is the first step to finding the pattern, and then deciding what to do about it.
Want to plan the year with real numbers?
A Clarity Audit maps your seasonal capacity picture across all six operational areas, so you can plan hiring, investment, and pricing around real data, not guesswork.