Calculators for
people who ship.
The maths every Indian D2C operator ends up doing in a spreadsheet at eleven at night. No signup, no email wall, no lead form.
What returns really cost
Put in your order volume and COD share to see the annual cost of returns to origin.
Open calculator → ROAS calculatorWhat does ROAS really tell you?
ROAS on its own tells you nothing — what matters is the ROAS your margin demands.
Open calculator → Contribution marginCM1, CM2 and CM3 explained
CM1, CM2 and CM3 per order, with returns drag counted across every order.
Open calculator → CAC & LTVCAC, LTV and the ratio between them
Acquisition cost against lifetime value, and how long the payback actually takes.
Open calculator → GMV to net revenueGMV, net revenue and the leakage between
GMV is the number on the deck; net revenue is the number in the bank.
Open calculator → Break-evenBreak-even, in orders rather than rupees
Fixed costs divided by what one order contributes, expressed in orders.
Open calculator →The numbers decide
everything else.
Pricing, ad budgets, whether to keep cash on delivery switched on — all of it comes down to a handful of figures most brands only calculate once a quarter, in a spreadsheet nobody else can open.
These are the same calculations we run with merchants during onboarding. They are free, they work without an account, and none of them ask for your email. If a number surprises you, that is usually the interesting one.
Most of them meet at the same place: returns to origin. RTO drags down contribution margin, inflates real acquisition cost, hides inside reported ROAS, and pushes your break-even point further away. It is the one line on all of these sheets that is purely operational — not a pricing decision, not a customer preference, just orders that should never have shipped in that form.
Then go fix
the biggest one.
Zelly Checkout scores every order for return risk before you pack it. Live today.