Online shopping tools
Free calculators and checkers that run in your browser, no sign-up. Each one uses the verified data from our guides and links its sources.
PayPal fee calculator
Calculate PayPal fees in the US: 2.99% for Goods & Services, 3.49% + $0.49 for Checkout and invoices, +1.50% international. Find what you receive or what to charge.
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Sales tax calculator
Add sales tax to a price or work backward from a total to the price before tax. Enter your combined state and local rate; shows the formula and tax amount.
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Discount calculator
Find the sale price after a percent off, stack two discounts (30% off + extra 20%), add sales tax, or work out what percent off a deal really is.
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eBay fee calculator
Estimate eBay seller fees: 13.6% final value fee for most categories plus $0.30–$0.40 per order, with trading cards, books, guitars and sneakers rates. See your profit.
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Etsy fee calculator
Calculate Etsy fees for US sellers: $0.20 listing fee, 6.5% transaction fee and 3% + $0.25 payment processing. Add your costs to see the profit on each sale.
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Percentage calculator
Find X% of a number, what percent one number is of another, the percent increase or decrease between two numbers, or add and subtract a percentage. With formulas.
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Profit margin calculator
Find the selling price for a target profit margin, including marketplace fees, or work out the margin and markup on a price you already have. Shows the formulas.
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Venmo fee calculator
Calculate Venmo fees: 2.99% on goods and services payments, 1.75% instant transfer ($0.25 min, $25 max), 1.9% + $0.10 for business profiles and 3% to send by credit card.
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Cash App instant transfer fee calculator
Estimate the Cash App instant transfer fee: 0.5% to 2.5% of the amount, with a $0.25–$1 minimum and a $75 cap, per Cash App’s terms. Standard transfers are compared.
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Mercari fee calculator
Calculate Mercari fees: 10% selling fee on item price plus buyer-paid shipping, the 3.6% Buyer Protection fee the buyer pays, and the $3 Instant Pay fee. See your profit.
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Depop fee calculator
Calculate Depop fees for US sellers: no selling fee, 3.3% + $0.45 payment processing on price, shipping and tax, and the optional 12% boosted listing fee.
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Poshmark fee calculator
Calculate your Poshmark earnings: $2.95 flat fee on sales under $15, 20% on $15 or more. Includes the $6.49 shipping label the buyer pays and payout options.
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Return deadline calculator
Find the last day to return a purchase at Amazon, Walmart, Target, Best Buy, Home Depot, Costco, Temu, SHEIN and more, plus typical refund times. Free and private.
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Package tracker
Paste a tracking number to see its format (UPS 1Z, international postal S10), the issuing country, and jump to the official USPS, UPS, FedEx, DHL or Amazon tracking page.
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Is this store legit? (checklist)
Answer 10 quick questions about an online store and see its red flags, based on FTC advice: reviews, total cost, return policy, payment methods and records.
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