Free Calculators & Tools

Simple, practical calculators designed to help New Zealand individuals, property owners and small businesses make sense of everyday numbers.

Explore Our Calculators

Add or remove 15% GST and see the GST component instantly.

Find your GST return and payment due date based on your taxable period.

Count working days between two dates, excluding weekends and New Zealand public holidays.

Estimate gross rental yield from a property’s value and annual rental income.

Calculate gross profit and profit margin from your cost and selling price.

Calculate markup percentage and selling price from your product cost.