Estimates only
QuantoObra provides estimates based on standard formulas and the values you enter. Actual material needs vary with site conditions, products and workmanship. Always confirm quantities with your supplier and follow local building codes and manufacturer instructions. We are not liable for losses arising from use of the calculators.
Quotes
Quotes you create are your own documents. You are responsible for their content, prices, taxes and for complying with the invoicing and consumer rules where you work. QuantoObra is not a party to any agreement between you and your client.
QuantoObra Pro
- Lifetime: a one-time payment that unlocks Pro features for as long as QuantoObra is offered.
- Monthly: renews every month until cancelled. Cancel anytime from the link in your receipt or your account page; Pro remains active until the end of the paid period.
- Pro is tied to the account (email address) used at checkout and is for use by that person on their own devices.
- If a renewal payment fails, Pro stays active while the payment is retried; it ends if the subscription expires unpaid.
Refunds
If you're not happy with Pro, email support@quantoobra.com within 14 days of purchase for a full refund.
Changes
We may update these terms; material changes will be noted on this page.
Last updated: October 27, 2026.