Make everyday business decisions with clearer numbers. These free tools help you prepare listings, understand contribution, plan advertising, and work through inventory and shipping choices. Inputs stay in your browser.
THE NORTHWEST COAST DIGITAL TOOLKIT
Free Business & Seller Tools
Less busywork. More room to grow.
Pricing & profitability
Profit Margin & Markup Calculator
Find your contribution per sale and the price needed for your target margin.
Open free toolBusiness Break-Even Calculator
Turn monthly costs and profit goals into a clear sales target.
Open free toolDiscount & Promotion Profit Calculator
See the margin impact of a discount and the extra sales needed to make it work.
Open free toolEtsy Fee & Profit Calculator
Estimate U.S. Etsy order contribution after fees, shipping, and product costs.
Open free toolAmazon FBA vs. FBM Profit Calculator
Compare fulfillment choices using your own per-unit Amazon and shipping estimates.
Open free toolAdvertising
ROAS & Break-Even ROAS Calculator
Compare advertising return with the contribution your products can support.
Open free toolBreak-Even ACOS Calculator
Calculate your advertising threshold and target ACoS from per-unit costs.
Open free toolCustomer Acquisition Cost & LTV Calculator
Compare acquisition costs with expected customer contribution and payback.
Open free toolAmazon listings
Amazon Listing & Backend Byte Checker
Check title and Item Highlights lengths, backend bytes, and target phrase coverage.
Open free toolCharacter & Word Counter
Count characters, words, lines, and UTF-8 bytes as you write.
Open free toolListing Keyword Checker
Find the target words or phrases present and missing in your listing copy.
Open free toolAmazon Listing Assistant
Format your copy with case, selection, and whitespace controls.
Open free toolDuplicate Keyword Remover
Clean keyword lists, compare two lists, and keep the phrases you need.
Open free toolASIN Extractor
Extract unique B0-format ASINs and turn them into clean Amazon product links.
Open free toolInventory & shipping
Reorder Point & Stockout Calculator
Estimate stock cover and replenishment dates from your sales and lead times.
Open free toolDimensional Weight Calculator
Compare two boxes using your carrier divisor and rounding rules.
Open free toolLanded Cost Calculator
Allocate shipment costs across sellable units and plan a viable selling price.
Open free toolChoose the question you need to answer
Start with margin and pricing when you want to understand a sale. Use advertising calculators to turn those economics into spending thresholds. Inventory and shipping tools help translate operating assumptions into reorder dates and packaging comparisons.
Built to make assumptions visible
Each calculator includes a worked example and a plain-language explanation. Replace the sample numbers with your own costs and review the assumptions with the result. No account connection is required. Platform-specific rates are labeled and editable where applicable.
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