QUOTAVANI · SOURCED ANSWERS
Calculations, currencies and tax
Understand line-item calculations, units, rounding and the difference between a subtotal and a tax decision.
From the Quotavani team · reviewed 2026-11-13. Follow the links for more detail, or ask us about your app version.
From our product guides
What does the free website calculator do?
Multiply quantities by rates and get a rounded subtotal before tax. Our free browser calculator needs no account or email, and your entries stay in browser memory. Use the Android app to create invoices; the calculator does not issue invoice numbers, generate official PDFs, convert currencies or calculate tax.
From our product guides
How should I enter quantities and units?
Use the unit you charge for. If you sell ten bags at a price per bag, enter ten bags. Use kilograms only when the rate is per kilogram. For labour, check whether the rate is per visit or per hour. The quantity and rate should always use the same basis.
From our product guides
How does browser-calculator rounding work?
Add up to twenty line items, with quantities to three decimal places. The calculator rounds each line half up to the selected currency's precision, then adds the rounded amounts. The currency selector controls the display; it does not convert money or confirm app currency support.
From our product guides
Does the calculator determine VAT or tax?
The website calculator gives you a subtotal before tax. Check VAT or other tax settings in your Android invoice draft before finalising it. Use the rules that apply to your business and transaction; a sample invoice cannot determine them for you.
From our product guides
Which currency labels does the website calculator support?
Choose NAD, ZAR, USD, EUR, GBP, JPY or KWD in the browser calculator. JPY shows no decimal places, KWD shows three, and the others show two. These labels control the calculator's display, without currency conversion. They do not define app purchase regions.