Free tools

E-commerce math, worked out correctly, in one page each.

Every tool here runs in the browser, gives you a real number instantly, and asks for nothing. Pick one below.

Diagnostics

Find your leak.

Upload your data

Find My Revenue Leak

Upload your Shopify orders and ad spend CSVs, see your real worst-margin product free, in your browser. Nothing is uploaded except your email, and only if you unlock the full table.

Calculators

Pricing and margin.

Markup

Markup calculator

Cost and markup % in, price, margin, and profit out, markup vs. margin explained.
Margin

Profit margin calculator

Revenue and cost in, margin and dollar profit out. The simple two-number version.
Retail pricing

Keystone pricing calculator

Check your product against the classic double-the-cost retail rule.
Wholesale

Wholesale price calculator

Cost in, wholesale and suggested retail price out, side by side.
Unit cost

Cost per unit calculator

Total cost and units in, true cost per unit out.
Bundles

Bundle pricing calculator

Bundle products, see the discount, the margin, and whether it still pays.
Subscriptions

Subscription pricing calculator

Cost, target margin, and expected renewal rate in, a price that survives churn out.
Discounts

Discount / margin impact calculator

See what a percent-off sale actually does to your margin before you run it.
Retail pricing

Retail price calculator

Cost and target margin in, the retail price to charge out.
Price floor

Price floor calculator

The lowest price that still covers cost, before any profit at all.

Calculators

Unit economics and operations.

Margin & break-even

Contribution margin calculator

AOV, COGS, payment fees and shipping in, contribution margin, break-even orders, and profit-target orders out.
Landed cost

COGS and gross profit calculator

Unit cost, freight, duty and packaging in, landed cost per unit, gross profit and gross margin out.
Acquisition

CAC calculator

Marketing spend and new customers in, cost per customer out.
Ad spend

ROAS calculator

Ad spend and revenue in, ROAS out, with your break-even ROAS.
Acquisition

CAC payback calculator

Contribution margin and CAC in, months to pay it back out.
Fees

Payment processing fee calculator

Order value and rate in, real fee and net payout out. Illustrative, not a quote.
Dropshipping

Dropshipping profit calculator

Supplier cost, shipping, ad spend in, real profit per order out.
Print on demand

Print-on-demand profit calculator

Base cost, platform fee, price in, actual profit out.
Returns

Cost of returns calculator

Reverse shipping, restock labor, lost resale value in, true cost of a return out.
Inventory

Reorder point calculator

Lead time and daily sales in, when to reorder out.
Inventory

Safety stock calculator

Demand variability and lead time in, buffer stock out.
Inventory

EOQ calculator

Order cost, holding cost, demand in, optimal order size out.
Inventory

Days inventory outstanding calculator

Average inventory and COGS in, days of stock on hand out.
Inventory

Inventory turnover calculator

COGS and average inventory in, turns per year out.
Subscriptions

Subscription box churn & MRR calculator

Subscribers, churn, price in, MRR and renewal math out.

Calculators

Small-business finance.

Invoicing

Invoice late fee calculator

Amount, days late, your rate in, what's owed out. Arithmetic only, not legal advice.

Next

See your real numbers, automatically, from your own store data.

Upstream is the connected version of these calculators: real per-order cost, real per-SKU landed cost, and real per-order shipping, straight from your store.

See it on your own data