Home / Tools / Span of Control Calculator
FREE TOOL: NO SIGNUPWhat your org chart costs at the span you say you want
Most span-of-control arguments happen without arithmetic. Put your headcount and loaded cost in, set the span you think you want, and read three things: the structure that span implies, the annual run-rate difference, and whether a manager week is long enough to actually carry it.
Everything runs in this page. Nothing you type is uploaded, stored on a server, or seen by me.
| Layer | Today | Target | Change |
|---|---|---|---|
| Managers | - | - | - |
| Senior leaders | - | - | - |
| Total headcount | - | - | - |
| Current average span | - |
|---|---|
| Management as share of headcount | - |
| Annual loaded cost today | - |
| Annual loaded cost at target | - |
A manager at the target span carries - reports. At the minutes you entered that is - of people-leadership time a week, against - reserved.
-
Read the run-rate number as the size of a question
It is the annual loaded cost of the management positions that sit between your current structure and the span you entered. It is not a savings forecast. It leaves out severance, recruiting, the productivity dip during a change, and every revenue, control and attrition effect that decides whether a restructuring was a good idea. A number this easy to produce is the start of the work, not the end of it.
One org-wide average also hides the thing that usually matters: a span that is generous in a stable department is reckless in one running new work. Departments differ, and this page treats them as one.
If you need the department-level version, the paid simulator models up to 24 departments, redeployment, severance, recruiting, a disruption allowance, payback period and a decision memo, with CSV and JSON import and export. One-time purchase, runs offline the same way this page does.
Organization Cost & Span Simulator: $119
Would rather not run it yourself? The operations diagnostic applies this analysis to your actual numbers and writes the findings up for your leadership team.
The paid version carries a 30-day usefulness guarantee: load real data, follow the instructions, and if it does not produce a usable structure decision, request a refund within 30 days.
How the numbers are produced
- Target managers = individual contributors divided by target span, rounded up.
- Target senior leaders = target managers divided by target leader span, rounded up, and only once there are at least two managers to coordinate.
- Cost = headcount multiplied by the loaded cost you entered, per layer. Individual contributor count is held constant, so the run-rate difference is entirely management layers.
- Attention demand = the span the target structure actually produces, multiplied by the minutes per report you entered.
- Attention available = manager hours per week multiplied by the percent reserved for people leadership.
The attention test is a time test only. It says nothing about whether a manager has the capability, the context or the controls to carry that many people. Clearing it is necessary, not sufficient.
Common questions
- Does anything I type get sent anywhere?
- No. The model runs in your browser as JavaScript on this page. There is no account, no upload and no server call. You can open the page, disconnect from the network and it still works.
- What is a "loaded" cost?
- Salary plus employer taxes, benefits, and anything else you carry per head. Use the number your finance team uses. If you enter base salary only, every cost figure here is understated by the same proportion.
- Why does it round managers up?
- A span target is a ceiling, not an average. If 241 people report into a target span of 8, you need 31 managers, not 30.1. Rounding down would publish a structure that breaches the span you just set.
- Is a wider span always cheaper?
- On this arithmetic, yes, because it removes management positions. That is exactly why the calculator also shows the attention test. Cost falls in a straight line; a manager week does not. The two readouts are meant to be read together.
- Can I trust the run-rate number as savings?
- Treat it as the size of the question, not as money in hand. It excludes severance, recruiting, lost productivity during a change, and any revenue or control effect. Those decide whether a restructuring is worth doing, and this free page does not model them.
- What does the paid simulator add?
- Up to 24 departments instead of one org-wide unit, redeployment modelling, severance and recruiting cost, a disruption allowance, payback period, a per-department decision memo, and CSV or JSON import and export. It is a one-time purchase and it runs offline in the same way.