Free calculators for inventory and invoicing

Add GST, HST or VAT to a price, or work the tax out of a tax-inclusive total — with the CGST/SGST split for India and GST + QST for Quebec.

Work out when to reorder each item: enter your daily sales and supplier lead time, choose a safety stock method, and get the reorder level.

See what it really costs to keep your stock on the shelf — capital, storage, handling, insurance and shrinkage, and obsolescence — as a rate and an annual amount.

Find out how many times a year you sell through your stock, and how many days an average item sits before it sells.

Find the order size that balances ordering costs against holding costs, and see how many orders a year that means.

Free tax invoice templates with every field each country requires.

Plain-English definitions of inventory and tax invoicing terms.

In-depth guides to inventory management and GST/VAT invoicing.