GROSS. — free commercial calculators for UK FMCG brand teams
The RangeThe whole portfolio on one till roll. Blended margin, the product that carries the range, and the full-year GSV-to-net plan across every SKU.
The whole portfolio on one till roll. Blended margin, the SKU that carries the range, and the full-year plan.
The workingsA range is a portfolio, and portfolios have passengers. This page puts every product on one till roll — grocery, Amazon and TikTok margin side by side, plus the period margin from your listing settings — and names the SKU that carries the rest. Blended margin is the number a buyer reads; the spread inside it is the number you should.
The in/out toggles are the range review, rehearsed. Delist a passenger on paper and watch the blended margin move before anyone makes it awkward in a meeting.
One product losing money in a range of six is a strategy question. Three is a maths question, and the maths is on this page.
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 Stock Answer — What to order, and when, before you run out. A weekly supply plan that follows your promo calendar, in whole c
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 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.