Useful tools for
people who sell online.
THE FIRST COLLECTION
Tools for people who sell online.
Plan inventory, price smarter, improve marketplace listings, and prepare better product creative without another login.
Amazon Referral Fee Calculator
Estimate Amazon U.S. referral fees by category, tier, and minimum fee.
Shopify Fee Calculator
Estimate Shopify payment-processing and optional third-party transaction fees from editable rates.
TikTok Shop Profit Calculator
Calculate per-order TikTok Shop profit after product, platform, creator, fulfillment, shipping, and ad costs.
Depop Shipping Cost Calculator
Reconcile a Depop label, buyer-paid shipping, packaging, and packed weight without claiming a live quote.
Minimum Order Quantity Calculator
Model the cash, landed cost, sell-through, excess inventory, and profit impact of a supplier MOQ.
Container Loading Calculator
Estimate carton fit, payload limits, and practical utilization for common freight containers.
GMROI Calculator
Calculate gross margin return on inventory investment from direct or derived retail inputs.
USPS Dimensional Weight Calculator
Apply current USPS domestic dimensional-weight thresholds, rounding, and the 139 divisor.
Warehouse Space Utilization Calculator
Calculate usable warehouse volume, occupied capacity, target headroom, and pallet-slot equivalents.
eBay Store Fee Calculator
Compare current U.S. eBay Store subscriptions and fixed-price listing overage costs.
Image Metadata Checker
Inspect image file facts and selected JPEG Exif fields locally without uploading the photo.
Fulfillment Cost Calculator
Calculate monthly and per-order fulfillment cost from a transparent 3PL cost ledger.
Stripe Fee Calculator
Estimate a standard U.S. domestic online-card fee, net receipt, and reverse-calculated gross charge.
Weeks of Supply Calculator
Calculate how many weeks and days current saleable inventory can cover at a declared weekly sales rate.
Poly Mailer Size Calculator
Estimate minimum flat poly-mailer dimensions and round upward to a purchasing increment.
Etsy Shop Name Generator
Generate deterministic Etsy-ready shop names within the current 20-character naming rules.
Retail Margin Calculator
Calculate gross profit, gross margin, and implied markup without mixing the percentage bases.
Image DPI Converter
Change PNG density metadata or resample pixels locally, with print-size consequences shown before download.
Amazon FBA Storage Fee Calculator
Estimate one month of U.S. FBA storage from packaged volume, units, size tier, and month.
Inventory Holding Cost Calculator
Total capital, storage, service, and risk costs and calculate the annual carrying rate.
Economic Order Quantity Calculator
Calculate classic EOQ, estimated order frequency, and annual ordering and holding costs.
Volumetric Weight Calculator
Compare dimensional and actual parcel weight with an explicit carrier divisor.
Contribution Margin Calculator
Calculate contribution dollars, ratio, and per-unit contribution from a variable-cost ledger.
Print-on-Demand Profit Calculator
Calculate POD profit, margin, platform fees, ad headroom, and batch contribution.
Walmart Seller Fee Calculator
Estimate Walmart Marketplace referral fees and pre-other-cost payout from total sales price by category tier.
Landed Cost Calculator
Calculate total import-to-door cost and landed cost per unit from a transparent shipment ledger.
Safety Stock Calculator
Calculate a whole-unit inventory uncertainty buffer with a statistical or average-maximum method.
Customer Acquisition Cost Calculator
Calculate CAC from a complete acquisition-spend ledger and first-time paying customers in one period.
COGS Calculator
Calculate cost of goods sold from beginning inventory, period costs, and ending inventory.
Image File Size Calculator
Calculate uncompressed pixel-data size from dimensions, channels, bit depth, and image count.
Break-Even Units Calculator
Calculate the whole-unit sales threshold needed to cover declared fixed and variable costs.
Product Description Generator
Generate three factual ecommerce descriptions from supplied product details without invented claims.
Shipping Box Size Calculator
Calculate minimum inside box dimensions from product size, packing grid, and clearance.
Image Size Checker
Inspect image dimensions, aspect ratio, megapixels, format, and exact bytes locally against optional targets.
Packaging Cost Calculator
Calculate packaging cost per order and batch from materials, labor, waste, and fixed setup cost.
Markup to Margin Calculator
Convert markup to gross margin or margin back to markup, with a concrete product-pricing example.
eBay Title Generator
Generate deterministic eBay title drafts from supplied product details within the current 80-character limit.
Break-Even ROAS Calculator
Calculate the revenue ROAS required to cover ad spend from product contribution margin.
eBay Fee Calculator
Estimate current basic U.S. eBay final value fees and payout by supported category.
Shopify Image Resizer
Resize product images to a consistent square canvas with crop or contain controls.
Mercari Fee Calculator
Estimate the current U.S. Mercari seller fee and payout from item price and shipping.
Depop Fee Calculator
Estimate regional Depop selling and payment-processing fees without hiding region differences.
TikTok Shop Fee Calculator
Estimate U.S. TikTok Shop referral fees with an explicit category and optional program rate.
Poshmark Fee Calculator
Calculate the current U.S. Poshmark fee and payout across the $15 threshold.
Whatnot Fee Calculator
Estimate Whatnot commission, processing, and payout with separate fee bases by category.
SKU Generator
Generate consistent product and variant SKUs with readable codes and numbered sequences.
Sell-Through Rate Calculator
Calculate sell-through rate and unsold units for one inventory cohort and period.
Wholesale Price Calculator
Calculate wholesale and suggested retail prices from unit cost, margin, and retailer markup.
Inventory Turnover Calculator
Calculate inventory turnover and days on hand from COGS and average inventory value.
Image Aspect Ratio Calculator
Upload an image to detect its ratio automatically, or enter dimensions manually for a proportional target size.
Reorder Point Calculator
Calculate when to reorder inventory from daily sales, supplier lead time, and safety stock.
Etsy Banner Resizer
Resize Etsy shop banners, protect the mobile safe zone, and download the finished image.
Etsy Tag Generator
Turn a product description into 13 focused Etsy search tags.
Etsy Title Generator
Create readable, search-focused Etsy product title ideas in seconds.
Etsy Fee Calculator
Estimate listing, transaction, payment processing, and optional advertising fees.
Etsy Seller Cost Calculator
Combine Etsy charges with product and packaging costs to estimate total cost and take-home revenue.
Etsy Fee and Profit Calculator
Calculate Etsy fees, total costs, net profit, and margin in one view.
Etsy Price Calculator
Work backward from costs and target margin to find a sustainable listing price.
Etsy Profit Calculator
Estimate the earnings and profit margin left after Etsy fees and product costs.
Etsy Shipping Cost Calculator
Estimate package shipping costs across domestic and international routes.
ROAS Calculator
Calculate realized return on ad spend from attributed revenue and advertising cost.
Warehouse Storage Cost Calculator
Calculate monthly warehouse storage cost and allocate it per unit and order.
Grailed Seller Fee Calculator
Estimate current Grailed commission, processing fees, and seller payout.
Amazon Dimensional Weight Calculator
Compare Amazon US dimensional and packaged scale weight for fee planning.
Depop Boosting Fee Calculator
Estimate current Depop Boosted Listings fees and compare boosted payout.
Square Processing Fee Calculator
Estimate current public U.S. Square processing fees and net receipt by plan and payment route.
Days Sales Inventory Calculator
Calculate days sales of inventory, turnover, and daily COGS on one declared cost basis.
UPC Validator
Validate UPC-A and EAN-13 digit structure and GS1 check digits without a product lookup.
Cardboard Box Weight Calculator
Estimate corrugated carton tare from flat blank area and combined-board grammage.
Whatnot Shipping Cost Calculator
Estimate current contiguous-U.S. Whatnot shipping through 5 lb and split buyer and seller cost.
BUILT BY LOOK ATLAS
Your product deserves more than a marketplace thumbnail.
Turn a simple product photo into polished, campaign-ready creative for your store, ads, and social channels. No studio. No reshoots.
Create your first shoot free, then keep going when you’re ready.