Shrinkage build-up calculator

Build shrinkage up from its component parts so you can see what’s driving it — and convert a net agent requirement into a gross scheduled headcount.

Components

Enter each component as a % of paid hours. Off-phone shrinkage compounds multiplicatively, not additively — this calculator handles that for you.

Annual leave / vacation (%)

Public / bank holidays (%)

Sickness / absence (%)

Training (%)

Coaching / 1-2-1 (%)

Team meetings / huddles (%)

Breaks (paid) (%)

Other off-phone (%)

Gross-up calculation

Net agents required (FTE)

e.g. the answer from the Erlang C calculator.

Results

Total shrinkage—

Net productive %—

Gross headcount needed—

Additional FTE vs. net—

Component breakdown

Component	Input %	Effective %
Total		—

Compound vs. additive shrinkage. If someone is on annual leave, they cannot also be in training that day. The components don’t simply add — the right way to combine them is 1 − (1 − a)(1 − b)(1 − c)…. The “effective %” column shows each component’s contribution after that compounding.