Calculators for the numbers that decide your margin.
Marketplace economics turn on a few figures most sellers never compute: what a return actually costs, which weight you are billed on, and what survives per order once returns are carried. Free, no signup, no email.
Three numbers worth knowing
Each runs entirely in your browser. Nothing is sent anywhere, nothing is stored.
RTO cost calculator: what a return really costs you
Most sellers count only the reverse freight. Add forward freight, lost margin, packaging and dead stock to see the true cost of every return to origin.
Volumetric weight calculator for Indian couriers
Couriers bill the greater of actual and volumetric weight. Enter your box dimensions to see which one you are being charged on — and whether smaller packaging would cost less.
True profit per order: the calculator with every cost
Commission, shipping, packaging, RTO share and tax — the full stack. Find out whether your per-order margin survives contact with your actual return rate.
Knowing the number is the easy part
A calculator tells you what a return costs in theory. It cannot tell you whether the charge on last month’s settlement was correct, whether the same shipment was deducted twice, or whether you paid reverse freight on a parcel that never came back.
Robnu is an agentic OMS for Indian marketplace sellers. It runs your AJIO and Meesho operations, reconciles every settlement against what the charges should have been, and files the claims when they do not match — a rare approval click while fully-autonomous filing rolls out.
Free while we figure out pricing · Forever free under 25 orders/day