Free, NZ-specific calculators with the rules, rates and thresholds that apply here — GST at 15%, RBNZ lending rules, IRD tax bands, MBIE Healthy Homes Standards. Every tool shows its assumptions and sources. New calculators are added regularly; the list below is the current directory.
Property & landlord
Landlord guides (2026 rules)
Insurance
Money & tax
Small business, work & pay
Coming next
Inflation and CPI, retirement drawdown, life insurance needs, fuel and mileage, BMI, TDEE and calorie, pregnancy due date, age, geometry and conversion calculators — one directory of NZ calculators built to the same standard.
Landlord? Two digital products built alongside these tools.NZ Landlord Pack (rental tracker + Healthy Homes checklist, NZ$39) and the NZ Landlord Compliance Kit (Healthy Homes, bond, IR3R-aligned expenses and inspection registers, NZ$99). Excel & Google Sheets, instant download.
See the Landlord Pack — NZ$39Prices exclude GST. Illustrative tools only — not legal, tax or financial advice.
All calculators are general information only — not financial, tax, legal or insurance advice. Confirm figures with IRD, Tenancy Services, your bank, insurer or adviser.
