Business Toolkit
Pricing, invoicing and payment-detail checks for small business owners and freelancers, curated in one toolkit.
Break-Even Calculator
Find how many units you need to sell to break even.
ROI Calculator
Calculate return on investment as a percentage.
ROAS Calculator
Calculate Return on Ad Spend from your ad spend and revenue.
CAC Calculator
Calculate how much it costs to acquire one new customer.
LTV Calculator
Estimate the total revenue a customer generates over their lifetime.
Freelance Rate Calculator
Calculate the hourly rate you need to charge as a freelancer.
Burn Rate & Runway Calculator
Calculate monthly cash burn and how long your runway will last.
Invoice Calculator
Add line items, discount and tax to calculate an invoice total.
IBAN Validator
Check an IBAN's structure, country length and ISO 7064 checksum.
VAT Number Validator
Check a VAT registration number's format against its country's expected pattern.
Invoice Number Generator
Builds invoice references from a cleaned prefix, current UTC year-month and a random six-digit suffix.
PDF Compressor
Reduce PDF file size for free, in your browser.
Who this collection is for
Small business owners and freelancers who need to price their work, validate a partner's payment details, and put together an invoice — a mix of marketing math, financial identifiers and document tools that a single "business" category doesn't fully cover.
What's in the toolkit
Pricing and profitability: Break-Even Calculator and ROI Calculator answer "is this worth doing," while ROAS Calculator, CAC Calculator and LTV Calculator answer "is this marketing spend working." Freelance Rate Calculator sets an hourly rate that actually covers overhead, and Burn Rate & Runway Calculator tracks how long current cash lasts. Getting paid correctly: Invoice Calculator totals a bill including tax, IBAN Validator checks a client or vendor's bank details before an international transfer, and VAT Number Validator confirms the format of a business's VAT ID before invoicing them. Paperwork: Invoice Number Generator keeps invoice numbering consistent, and PDF Compressor shrinks a signed contract or invoice PDF before emailing it.
A typical workflow
Before taking on a new project, run Break-Even Calculator to see how much needs to sell to cover costs, and Freelance Rate Calculator to confirm the hourly rate covers overhead. When invoicing a client, generate the next number with Invoice Number Generator, total the amount with Invoice Calculator, and validate their VAT number with VAT Number Validator before sending it. Before wiring an international payment to a vendor, double-check their IBAN with IBAN Validator.