How do you calculate shelf-life loss?

Multiply the monthly expiry rate by the exposure window to get total units lost, then multiply by cost per unit. At 400 units/month over 6 months that is 2,400 units, and at $4.50 each the loss is $10,800.

What does the exposure window mean here?

It is the number of months over which expiry is accumulating, such as the period a slow SKU sits in finished goods. Six months at 400 units/month yields 2,400 expired units.

Should I use cost or selling price for the loss?

Use cost per unit for inventory write-off and reserve accounting, as this tool does. Lost margin is a separate, larger figure if you want to size the revenue impact.

What is a good shelf-life loss rate for supplements?

Best-in-class operations keep expiry write-offs under 1-2% of finished-goods value. Date-sensitive probiotics and softgels often run higher and deserve closer planning.

How do I reduce shelf-life loss?

Tighten demand forecasts, shorten production runs on slow SKUs, enforce FEFO picking, and set up early-warning alerts on lots within a few months of expiry.

Does this include disposal cost?

No. The $10,800 here is inventory value only. Add destruction, reverse-logistics, and reserve-true-up costs for the full financial impact.

Nutraceuticals & Functional Foods calculator

Shelf-Life Loss Calculator

Shelf-life loss quantifies the dollar value of nutraceutical and functional-food inventory that expires or gets written off before it can be sold, over a defined exposure window. Supply-chain and finance teams use it to size obsolescence reserves, justify shorter production runs, and build the business case for better demand planning on date-sensitive SKUs. Supplements carry firm potency-based expiry dating, so slow-moving lots become a guaranteed write-off rather than a markdown opportunity. This calculator turns a monthly expiry rate, the months of exposure, and unit cost into the total units lost and their cost.

What this calculator does

Estimate the value of finished supplement stock lost to expiry over an exposure window, so planning and finance can size shelf-life write-off risk.
A planning or finance lead needs the cost of product that expires or is written off over a period to weigh against batch sizing and dating decisions.
It computes the number of units expired or written off over a window and the dollar value of that loss at your unit cost.

Formula used

Units expired or written off = monthly expiry or write-off rate × exposure window
Shelf-life loss value = units expired or written off × cost per unit

Inputs explained

Monthly expiry or write-off rate:
Exposure window:
Cost per unit:

How to use the result

Use it when sizing obsolescence reserves, evaluating run-size or demand-planning changes, or reviewing slow-moving SKUs.
It assumes a steady monthly expiry rate; a single large aged lot reaching its date can spike loss well above the smooth average.

Current U.S. benchmarks

Industrial natural gas averages $4.9 per Mcf (EIA, Apr 2026), down 7.7% from a year earlier, with industrial electricity at 8.66 cents per kWh. Process heating and refrigeration budgets track both.
The U.S. has 31,130 food manufacturing establishments employing about 1,707,316 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate shelf-life loss? Multiply the monthly expiry rate by the exposure window to get total units lost, then multiply by cost per unit. At 400 units/month over 6 months that is 2,400 units, and at $4.50 each the loss is $10,800.
What does the exposure window mean here? It is the number of months over which expiry is accumulating, such as the period a slow SKU sits in finished goods. Six months at 400 units/month yields 2,400 expired units.
Should I use cost or selling price for the loss? Use cost per unit for inventory write-off and reserve accounting, as this tool does. Lost margin is a separate, larger figure if you want to size the revenue impact.
What is a good shelf-life loss rate for supplements? Best-in-class operations keep expiry write-offs under 1-2% of finished-goods value. Date-sensitive probiotics and softgels often run higher and deserve closer planning.
How do I reduce shelf-life loss? Tighten demand forecasts, shorten production runs on slow SKUs, enforce FEFO picking, and set up early-warning alerts on lots within a few months of expiry.

Last reviewed 2026-05-12.