Labor cost percentage is one division: total labor cost for a period over net sales for the same period. Everything difficult about it is in the two inputs. Most people understate the cost by using wages rather than the burdened figure, and many compare against gross rather than net sales, which makes the result look better and makes it impossible to compare with anybody else's. Get both right once, use the same definition every week, and the trend becomes the most useful number in the business.
The cost side: wages are not the cost
Add employer payroll taxes, workers compensation and liability insurance, holiday accrual, and any paid non-productive time such as training or meetings. The uplift on the bare wage is not trivial and it is roughly constant, which is precisely why leaving it out distorts every comparison rather than canceling out.
The sales side: net, and the same period
Net sales excludes sales tax and usually comps and discounts. Use the period the labor was actually worked, not the payroll period, or a week with a payroll cutoff in the middle of it will produce a figure nobody can explain. Weekly is the minimum useful grain; by day part is where the answers are.
What the answer is for
Not a benchmark against a published industry average, which mixes formats that have nothing in common. It is for comparing your own weeks and your own day parts, so that the two shifts carrying the overstaffing become visible. That comparison only works if the definition never changes.
Questions people ask about labor percentage calculator
How do I find labor cost percentage quickly?
Take the period's total labor cost including employer burden, divide by the period's net sales, multiply by a hundred. If you only have wages, apply your own burden uplift as a fixed factor rather than ignoring it.
Should scheduled or actual hours be used?
Both, separately. Scheduled tells you what you planned and can be read before the week starts; actual tells you what happened. The gap between them is a measure of how realistic your schedules are, and it is usually the most actionable of the three numbers.
Does labour percentage include salaried managers?
It should, if you want a figure that reflects what people cost. Many operators track hourly labor separately because it is the part they can change week to week, which is legitimate as long as the definition is stated and kept.