United States · Tools

Free US ecommerce calculators

Every calculator runs 100% in your browser — no signup, no API, no data sent anywhere. Fee inputs are editable so results stay accurate as marketplaces update their pricing.

EcommerceFree

TikTok Shop Profit Calculator

Estimate net profit per TikTok Shop order after fees, affiliate commission, shipping, discounts, and returns. USD.

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EcommerceFree

Etsy Profit Calculator

Estimate Etsy profit after listing fee, transaction fee, payment processing, Offsite Ads, shipping, and discounts. USD.

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EcommerceFree

Shopify Profit Margin Calculator

Calculate Shopify profit margin after payment processing, apps, shipping, ad cost, and discounts. USD.

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AdvertisingFree

Break-Even ROAS Calculator

Find the minimum ROAS your ecommerce store needs to break even after COGS, shipping, fees, and returns. USD.

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EcommerceFree

Amazon FBA Profit Calculator

Estimate Amazon FBA profit per unit after referral fee, FBA fulfillment fee, storage, PPC, and returns. USD.

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EcommerceFree

eBay Fee & Profit Calculator

Estimate eBay profit after final value fee, per-order fee, payment processing, promoted listings, and shipping. USD.

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EcommerceFree

Walmart Marketplace Profit Calculator

Estimate Walmart Marketplace profit after referral fee, WFS fulfillment, ads, and returns. USD.

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TaxFree

US Sales Tax Calculator

Calculate US sales tax from a sale amount and a rate. Add tax to price or extract tax from a total. USD.

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InventoryFree

Reorder Point Calculator

Find the inventory level at which to place a new supplier order to avoid stockouts. USD-free, works for any SKU.

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AdvertisingFree

Ecommerce Ad Budget Calculator

Calculate a monthly ad budget from a revenue target, paid share, and target ROAS. USD.

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ShopifyFree

Free Shipping Threshold Calculator

Find the free-shipping cart minimum that protects margin while lifting average order value on Shopify. USD, browser-only.

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OperationsFree

Ecommerce Return Rate Calculator

Calculate return rate, revenue lost to returns, and adjusted profit for Shopify, Amazon, and eBay stores. Free, browser-based.

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SourcingFree

Landed Cost Calculator

Calculate true landed cost per unit: product, freight, duty, insurance, packaging, payment fees, and warehouse allocation. USD.

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InventoryFree

Inventory Days of Cover Calculator

Calculate how many days your current stock will last, plus reorder pressure signals for lead time and safety stock. Browser-only.

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ShopifyFree

Shopify Bundle Pricing Calculator

Price product bundles without eroding margin after discounts and shipping. Calculate bundle margin, break-even discount, and per-unit contribution.

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AmazonFree

Amazon FBA Storage Fee Estimator

Estimate monthly and long-term FBA storage fees from cubic feet, months held, and your current per-cubic-foot rate. Free, browser-only.

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FinanceFree

Ecommerce Cash Flow Forecast Calculator

Project 90-day operating cash from revenue, payout timing, ad spend, inventory buys, and returns. Free, works in your browser.

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FinanceFree

Marketplace Payout Reconciliation Tool

Reconcile expected vs actual marketplace payouts. Enter gross sales, fees, refunds, ads, and holds. Free, browser-only.

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LegalFree

Ecommerce Refund Policy Generator

Generate a plain-English refund policy template for Shopify, Etsy, and DTC stores. Editable, no signup. Not legal advice.

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InventoryFree

Product Launch Inventory Calculator

Estimate launch stock from traffic, conversion rate, ad budget, and reorder lead time. Avoid stock-outs and dead inventory. Free.

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EmergencyFree

Chargeback Response Builder

Generate a professional chargeback response letter and evidence checklist for Stripe, Shopify Payments, and PayPal disputes. Free, browser-based.

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EmergencyFree

Marketplace Suspension Appeal Builder

Build a Plan of Action appeal for Amazon, Etsy, Walmart, eBay, TikTok Shop, or Shopify Payments account suspensions. Free, no signup.

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EmergencyFree

Lost Package Claim Template

Generate a customer message and a carrier claim checklist for a lost USPS, UPS, or FedEx package. Free, no signup, no live tracking.

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EmergencyFree

Ecommerce Cash Runway Calculator

Calculate months of cash runway for a US ecommerce store based on cash, revenue, expenses, inventory buys, and ad spend. Free.

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EmergencyFree

Late Invoice Email Generator

Generate polite, firm, or final-notice email templates for late invoices. Free, browser-based, no signup.

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EmergencyFree

Customer Refund Decision Calculator

Compare the true cost of a full refund, replacement, partial refund, and store credit for a single order. Free, browser-based.

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EmergencyFree

US Sales Tax Nexus Checklist

Enter your revenue and orders to see which US economic-nexus thresholds you may cross for common states. Educational — not tax advice.

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EmergencyFree

1099-K Prep Checklist for Online Sellers

Reconcile marketplace payouts, refunds, and fees against your 1099-K. Free browser tool for US ecommerce sellers.

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EmergencyFree

Product Recall Notice Generator

Generate a customer recall email, a website notice, and a support script for a voluntary product recall. Free, browser-based.

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EmergencyFree

Bad Review Response Builder

Generate a calm public reply and a private follow-up message for a negative review on Amazon, Etsy, Shopify, Google, or Trustpilot.

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WalmartFree

WFS Fee Calculator

Free WFS fee calculator: enter your price, weight tier and referral rate to see Walmart Fulfillment Services fees, storage, inbound freight and net profit per unit. No signup.

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WalmartFree

Walmart Profit Calculator

Estimate Walmart seller fees, referral fees, product cost, shipping, returns and net profit in USD.

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ShopifyFree

Free Shopify Profit Calculator

Calculate Shopify product profit after cost, shipping, transaction fees, ads, returns and discounts.

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ShippingFree

USPS vs UPS vs FedEx Shipping Cost Calculator

Compare USPS, UPS and FedEx shipping costs manually using package weight, zone, carrier rate and margin impact.

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AdvertisingFree

Ecommerce Bid Simulator

Estimate clicks, CPC, conversions, revenue and ROAS before changing ad bids.

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SEOFree

Free Search Intent Analysis Tool

Classify keyword intent as informational, commercial, transactional or navigational with examples and content advice.

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SecurityFree

Business Password Generator

Generate strong passwords for teams, stores, admin accounts and ecommerce tools locally in your browser.

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Educational calculators. Not financial, tax, or legal advice.