GROSS. — free commercial calculators for UK FMCG brand teams
The Stock AnswerWhat to order, and when, before you run out. A weekly supply plan that follows your promo calendar — order-up-to cover in whole cases, with stockout warnings.
What to order, and when, before you run out. A weekly supply plan that follows your promo calendar, in whole cases.
The workingsService level is a supply question wearing a sales costume. This page runs the same weekly demand as The Listing — promos included — against your opening stock, your order lead time and your cover target, week by week. Orders placed in week one arrive after the lead time; anything demand takes that stock cannot supply is an unmet week, printed in red.
The promo calendar is where availability plans go wrong. An uplift you modelled on The Listing is stock you need weeks earlier here, because the lead time does not care about your launch date. Edit the order column until the red disappears; that column is the plan.
Out-of-stock in week three of a new listing is how you turn one difficult range review into two.
The other calculatorsHome — Free commercial calculators for UK FMCG brand teams. Retailer margins, gross-to-net, trade spend payback, supp
The Shelf — Your range, defined once. Enter each product’s cost price, RSP, units per case and rate of sale — every calcul
The P&L — See what the retailer really makes on you. Reads top-down: shelf price, VAT, who takes what, and what you actu
The Waterfall — Every deduction between the shelf price and your bank. Gross to net net, with promo funding, back margin and o
The Floor — The lowest cost price, or the RRP, that still clears your target margin. Solved backwards from the number you 
The Listing — Model the range review before the buyer does. Week by week, with a full promo calendar behind the annual GSV-t
The Payback — How much incremental volume a promo needs to pay itself back. Break-even in cases, and the uplift that implies
The Amazon Cut — What FBA takes before you see a penny. Every fee per unit, plus a full-year GSV-to-net P&L by cases sold.
The TikTok Cut — What TikTok Shop takes on every sale. Every fee per unit, plus a full-year GSV-to-net P&L by cases sold.
The Line-Up — The same product across grocery, Amazon and TikTok, side by side. The biggest channel is rarely the one that p
The Range — The whole portfolio on one till roll. Blended margin, the SKU that carries the range, and the full-year plan.
The Wait — Margin is an opinion; cash is a fact. When the money actually moves — and the gap your bank account has to sur
The Ledger — One email a month on the commercial maths of UK FMCG. No selling. The archive lives here.
The Ledger No. 001 — Your margin is your insurance. The minimum margin that survives a halved rate of sale, worked in full.
The Guides — The long reads behind the calculators: retailer margin, gross-to-net, FBA fees and margin benchmarks, written 
How retailer margin actually works — Front margin, back margin, margin vs mark-up and the wholesaler layer — with the arithmetic shown.
Gross-to-net: where your revenue goes — GSV, NSV, promo funding and back margin — the waterfall between invoice and bank, and what a healthy one looks
Amazon FBA fees in the UK — Referral, fulfilment, storage and the plan, added up honestly — plus the break-even price nobody checks.
FMCG margin benchmarks — Indicative UK brand gross-margin ranges by category, measured on the right base and honest about being ranges.
Payment terms in UK grocery — Sixty days is not a detail — it is working capital, and it is yours. The debtor-day maths, the shelf-fill trap
What a promotion actually costs — Funding off invoice, the uplift with the widest error bars in the building, and the payback test nobody runs. 
The Rate Card — Every default in GROSS., what it is, when it was checked and where it comes from. The maths is only as good as
Free, no sign-up. The maths is checked; the defaults are dated and sourced on The Rate Card. VAT number: not applicable. This is a website.