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Free business tools that work in your browser

Invoices, receipts, quotes, margin, markup, sales tax and VAT. No sign-up, nothing to install, and your data stays on your device.

Popular:Invoice generatorProfit margin calculatorBreak-even calculatorSales tax calculatorVAT calculatorHourly to salary calculator

Invoices & documents

Make invoices, receipts and quotes in your browser and save them as PDF.

All invoices & documents tools

Pricing & profit

Work out margin, markup, discounts and break-even before you set a price.

All pricing & profit tools

Online selling

See what marketplace and payment fees really cost you, and what you keep from each sale.

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Payment fee calculator

See what a card or PayPal payment costs you in fees, or what to charge so you receive a set amount.

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Etsy fee calculator

Work out every Etsy fee on a sale and the profit you keep after item and shipping costs.

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Ecommerce profit calculator

See the real profit on each online order after product, shipping, fees, ads and returns.

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Dimensional weight calculator

Work out the DIM weight and billable weight of a parcel, and whether size or weight sets the price.

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eBay fee calculator

Work out eBay’s final value fee, per-order fee and ad fee on a sale, and the profit you keep.

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Poshmark fee calculator

See Poshmark’s fee on any sale price, what you earn and your profit after costs.

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Mercari fee calculator

See Mercari’s selling fee on a sale, what you take home and your profit after costs.

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Depop fee calculator

See Depop’s payment processing and boosting fees on a sale, your payout and your profit.

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TikTok Shop fee calculator

See the TikTok Shop referral fee and affiliate commission on a sale, and the profit you keep.

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Marketplace fee comparison

Compare fees, payout and profit for the same sale on eBay, Etsy, Poshmark, Mercari, Depop and TikTok Shop.

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Venmo fee calculator

Work out Venmo and Cash App seller fees and instant transfer fees, or what to charge to receive an exact amount.

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Credit card surcharge calculator

Work out the surcharge that covers your card processing fee, as a dollar amount and a share of the sale, and check it against the caps.

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Marketing & ads

Measure what your ads and marketing really return, and what a customer costs to win.

All marketing & ads tools

Sales tax & VAT

Add or remove sales tax and VAT, and see the net, tax and gross amounts.

All sales tax & vat tools

Stock & inventory

Know when to reorder, how much to order and how fast your stock turns.

All stock & inventory tools

Pay & rates

Turn hourly rates into salaries and work out what to charge as a freelancer.

All pay & rates tools

Finance & tax

Plan loan repayments, measure returns, read your financial ratios and estimate self-employed tax.

All finance & tax tools

Guides

Plain answers on fees, tax, pricing and pay, with worked examples and sources.

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12 numbers that show if your business is healthyGuide

12 financial ratios every small business owner should know

Twelve ratios, grouped into liquidity, debt, profitability and efficiency, tell you most of what a lender or buyer would want to know about a small business. Each takes two numbers from your balance sheet or income statement.

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Your ads may be losing money at a 2x ROASGuide

Break-even ROAS: how to find the ad return you need to stop losing money

Your break-even ROAS is the return on ad spend at which ads pay for themselves and nothing more. It comes from your margin after every cost except ads, so two stores with the same ROAS can have very different profits.

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Same $50 sale. Fees from $2.36 to $10.Guide

eBay vs Poshmark vs Mercari fees in 2026, plus Depop, Etsy and TikTok Shop

Each resale marketplace charges sellers in a different way, which makes headline percentages hard to compare. Here is the same US sale run through all six, with the arithmetic shown, and what changes on cheap items and promoted sales.

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Where 11% of your Etsy sale really goesGuide

Etsy fees explained: what Etsy charges on every sale in 2026

Etsy takes a listing fee, a 6.5% transaction fee and a payment processing fee on most sales, plus Offsite Ads and a regulatory operating fee in some cases. Here is what each one costs, what it is charged on, and how much a typical order loses to fees.

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Salary is only 70% of what a hire really costsGuide

How much does an employee cost? The real cost beyond salary

An employee costs more than their salary. In the US you also pay employer payroll taxes, unemployment taxes, insurance and any benefits you offer, which often adds 20% to 40% or more on top of pay depending on the benefits.

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Is your stock sitting on the shelf too long?Guide

How to calculate inventory turnover, and what to do with the answer

Inventory turnover tells you how many times you sell through your average stock in a period. Divide cost of goods sold by average inventory, then turn the result into days to see how long stock sits before it sells.

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Free, with no limits

Every tool is completely free. No trials, caps, watermarks or paid upgrades.

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Open a tool and use it straight away. No account, no email, no download.

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