Business tools
Open Business tools on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.
Page guide
Find the right tool and get straight to your task.
No account needed.Barcode generator
Turn a product code or text into a barcode.
Invoice generator
Create a basic PDF invoice with your line items and tax.
Hourly to salary
Estimate annual and monthly gross pay from an hourly rate.
QR code reader
Read a QR code from an image or your camera.
Barcode reader
Read a supported barcode from an image or your camera.
Meeting cost
Estimate a meeting’s total staff cost.
Quote generator
Turn your line items and tax into a PDF price quote.
Accounts receivable turnover calculator
Compare credit-sales turnover and collection days across your financial periods.
Advertising break-even calculator
Work out the most you can spend on ads for each order and still break even, from your order value, product cost, shipping and payment fees. See break-even and target CPA, ROAS, ACoS and cost per click.
Asset checkout tracker
Replay a log of equipment check-outs and returns to see who has each item, when it is due back and what is overdue, with a dated history.
Bundle price calculator
Price a product bundle by discount, fixed price or target margin, and see how the bundle price is shared across items with different margins. Spot items that lose money inside the bundle.
Cash conversion cycle calculator
Connect inventory, collection and payable days to calculate your cash conversion cycle.
Cash runway calculator
Compare monthly cash balances, reserve breaches and funding timing across business scenarios.
Cycle time bottleneck calculator
Compare serial production stages, account for parallel stations and find every tied capacity constraint.
Declining balance depreciation calculator
Build an accelerated depreciation schedule with an explicit switch to straight line.
Discount profitability calculator
Test several discounts against your price and unit cost. See the contribution left per unit and the sales volume increase each discount needs to keep the same gross profit.
Early payment discount calculator
Compare invoice discount savings with borrowing costs and fees before paying early.
Forecast accuracy calculator
Compare actual values with forecasts using MAE, RMSE, signed bias, MAPE and WAPE. Inspect every error and download the full report.
Free shipping threshold calculator
Test a free shipping threshold against your real order values. See the shipping subsidy, the contribution left after shipping and the smallest threshold that still pays for shipping.
Freemium unit economics calculator
See what your free users cost each paying user, and the contribution, lifetime value and acquisition payback left after that. Find the paying share you need to cover your free users.
Inventory turnover calculator
Calculate inventory turnover and holding days from opening and closing balances.
Invoice aging calculator
Group unpaid invoice balances by overdue days as of a date you choose.
Invoice number gap checker
Find duplicate invoice identifiers and internal sequence gaps without uploading your records.
Kanban card calculator
Estimate whole replenishment cards from average daily demand, lead time, a chosen buffer and container size.
All tools (13)
About business tools
Small business owners, freelancers and operations teams use these free business tools for everyday paperwork and quick checks. The Invoice generator and Quote generator produce clean documents you can download, and the Barcode generator, Barcode reader and QR code reader cover product labels and scanning. Hourly to salary and Meeting cost turn time into money, while calculators such as Inventory turnover, Cash runway, Landed cost and Working capital help with planning.
Choose by the decision in front of you. For billing, start with the invoice or quote generator. For pricing, try the Unit price, Wholesale price or Bundle price calculator. For cash planning, compare Cash runway with the Cash conversion cycle calculator before you commit to a purchase.
Popular business tools
Common questions
Is the invoice generator free to use without an account?
Yes. The Invoice generator is free and needs no account. You add your business details, line items, discounts and tax, then download the finished invoice. It runs in your browser, so your billing details are not sent to our server.
Can these calculators replace advice from an accountant?
No. The calculators apply standard formulas to the numbers you enter, which makes them useful for quick checks and planning. Tax rules, depreciation methods and reporting standards vary, so confirm important figures with a qualified professional before filing or signing anything.
Which barcode formats can I create?
The Barcode generator supports common formats such as Code 128, EAN and UPC, and calculates check digits. Choose the format your scanner or marketplace requires, preview the result and download it. Test a printed sample with the Barcode reader or your own scanner before printing labels in bulk.