All tools

13 tools and counting. Every one is free to try — register to save your work.

Monthly payment, total interest & full amortization schedule.

Gross profit, margin % and markup % from price and cost.

How many units to sell to cover your costs.

Return on investment %, net profit & annualized return.

Set the right selling price from cost + target margin.

Add or remove sales tax / VAT from any amount.

How many months of cash you have left — and when it runs out.

Sale price, savings and tax — worked out instantly.

A clean, professional email signature you can paste anywhere.

Build trackable campaign URLs for Google Analytics.

Return on ad spend, ACoS and break-even in one view.

Customer acquisition cost vs lifetime value — is it healthy?

Conversion %, revenue per visitor and what-if targets.