Tools & Converters Calculators
20 free tools & converters calculators for New Zealanders.
Percentage, discount, currency (NZD), date difference, age, unit converter (metric ↔ imperial), tip, timezone, and other everyday utility calculators.
Percentage Calculator
Calculate percentages quickly — find X% of a number, work out what percentage one number is of another, or calculate percentage increase and decrease.
Unit Converter
Convert between metric and imperial units — length, weight, volume, temperature, and area. NZ uses metric, but imperial still pops up for building and cooking.
Currency Converter
Convert NZD to and from other currencies using live exchange rates. Handy for online shopping, travel budgeting, and comparing overseas prices.
Discount / Sale Price Calculator
Calculate the sale price after a percentage discount, or work backwards from the sale price to find the original. Handy for Boxing Day and Black Friday deals.
Age Calculator
Calculate your exact age in years, months, and days. Find out how many days until your next birthday or the age difference between two people.
Date Calculator
NZ date calculator: add or subtract days, weeks, months. Count working days excluding NZ public holidays (Waitangi, ANZAC, Matariki, etc.).
Tip Calculator
Split the bill and calculate tips. Tipping is not expected in NZ, but this is handy for splitting restaurant bills evenly among your mates.
Time Zone Converter
Convert times between NZST/NZDT and other time zones around the world. Essential for scheduling calls with overseas colleagues, clients, or whanau.
Inflation Calculator
Calculate the effect of inflation on purchasing power over time using NZ CPI data. See what past prices would be worth today and vice versa.
Savings Goal Calculator
NZ savings goal calculator: work out the weekly or monthly amount needed to reach a target. Factor in starting balance, interest rate, and timeframe.
Loan Comparison Calculator
Compare up to four loans side by side — interest rates, fees, repayments, and total cost of borrowing. Make an informed decision before signing up.
Power Bill Calculator
Estimate your monthly power bill in NZ from your usage (kWh), region, fixed charges, and unit rates. Compare to the NZ average.
Power Bill Time-of-Use Plan Comparator
Compare NZ retailer power plans — flat-rate, Time-of-Use, Hour of Power, and spot price. See which is cheapest for your usage pattern.
Travel Insurance Estimate Calculator
Estimate travel insurance cost for trips from NZ by destination, duration, age, and add-ons (skiing, cruise, pre-existing conditions).
Flatmate Rent & Bills Splitter
Split rent and bills fairly between flatmates. Weight by room size, ensuite, and usage share. Generate a flatmate agreement summary.
NZ Wedding Budget Calculator
Build a realistic NZ wedding budget by guest count, region (Auckland to Queenstown), and tier. Itemised breakdown across 12 categories.
Funeral Cost Calculator
Estimate NZ funeral costs by service tier, burial vs cremation, and region. Factors in WINZ Funeral Grant (up to $2,559 in 2026).
Pet Lifetime Cost Calculator
Estimate annual and lifetime cost of owning a dog, cat, or rabbit in NZ. Includes food, vet, registration, insurance (Southern Cross Pet, AA, PD).
NZ Carbon Footprint Calculator
Calculate your annual carbon footprint (tonnes CO2-e) and the NZ ETS offset cost. Tracks car, flights, electricity, gas, and diet against the NZ 17t/yr average.
Tyre Size Comparison Calculator
Compare tyre sizes and see how a different size affects your speedometer reading, ground clearance, and overall diameter. Check WoF compliance for tyre changes.