Grow savings
Estimate the effect of deposits, time, interest and tax on your money.
New Zealand money tools
Money & Finance Calculators NZ
Use free New Zealand calculators for KiwiSaver, savings, term deposits, retirement, loans and currency. Each tool is designed to explain the result, show the assumptions and help you make a clearer financial decision.
- Free to use
- No sign-up
- NZ-specific terminology
- Transparent formulas
Last reviewed: 5 July 2026
Find a money calculator
Search by calculator name, financial goal or topic.
Direct answer
What are money and finance calculators?
Money and finance calculators turn financial inputs such as income, deposits, interest rates, contribution rates, loan terms and exchange rates into useful estimates. On NZ Calculator, the tools are written for New Zealand users and cover saving, retirement planning, borrowing and currency conversion.
They are designed for planning and comparison. They do not replace personalised financial, investment, tax or lending advice.
- Clear inputs and results
- Methods explained on each page
- NZ sources used where relevant
- Related calculators linked together
Start here
Popular money calculators
Quick access to the core tools for saving, retirement planning and borrowing.
KiwiSaver
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KiwiSaver Calculator NZ
Project a future balance and compare employee contribution settings.
Savings
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Term Deposit Calculator NZ
Estimate gross interest, tax and the final value of a term deposit.
Borrowing
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Loan Calculator NZ
Estimate repayments, total interest and the total cost of borrowing.
Choose by goal
What do you want to calculate?
Start with the financial decision you are trying to make.
Plan retirement
Project long-term savings and compare a future balance with your goal.
Understand borrowing
See repayments, interest and the overall cost before taking on debt.
Convert currencies
Convert New Zealand dollars and selected foreign currencies for planning.
Calculator directory
All Money & Finance calculators
Filter the directory by topic or use the search box above.
Filter by topic
KiwiSaver Calculator NZ
Project your KiwiSaver balance and compare contribution settings.
Term Deposit Calculator NZ
Estimate gross interest, RWT or PIR and the final deposit value.
Savings Calculator NZ
Estimate savings growth from a starting balance and regular deposits.
Retirement Calculator NZ
Estimate future retirement savings and compare them with a target.
Loan Calculator NZ
Calculate repayments, total interest and the overall cost of a loan.
Currency Converter NZ
Convert New Zealand dollars and selected foreign currencies.
No matching calculators were found. Try a broader term such as "savings", "loan" or "retirement".
Money topics
Understand the decision behind the number
Each topic connects calculators that answer related questions.
Savings and term deposits
A savings calculation estimates how a starting amount, regular contributions, interest and time may combine. A term deposit calculation focuses on a fixed deposit, a stated term, an annual rate and the applicable tax treatment.
Use both tools when comparing flexibility against a fixed-term return.
KiwiSaver and retirement
KiwiSaver projections usually combine current savings, salary, contribution rates, employer contributions, government contributions, fees and an assumed return. Retirement estimates take a wider view by comparing future savings with a target or expected spending need.
These are long-term illustrations, so small changes in assumptions can materially change the result.
Loans and borrowing
A loan repayment is influenced by the amount borrowed, interest rate, repayment frequency and term. Comparing total interest as well as the regular payment gives a clearer view of the real borrowing cost.
Actual lender fees, rate changes and approval criteria may not be included in a general calculator.
Currency conversion
A currency converter applies an exchange rate to an amount. The result is a planning estimate because banks, card providers and transfer services may add margins, fees or different buy and sell rates.
Transparency
Why use NZ Calculator?
The aim is to make each estimate understandable, not just display a number.
New Zealand context
Tools use New Zealand terminology, currency and rules where the calculation depends on them.
Transparent formulas
Calculator pages explain the inputs, method, assumptions and important limitations.
Visible review dates
Pages that depend on changing rates or rules show when their information was reviewed.
No sign-up required
Core calculators can be used without creating an account or supplying personal details.
Official sources used where relevant
Individual calculator pages identify their specific sources. Common New Zealand sources include Inland Revenue, the Reserve Bank of New Zealand, the Financial Markets Authority and Sorted.
How to use the tools
Get a more useful estimate in three steps
Use realistic inputs
Enter the actual rate, term, contribution or repayment information available to you.
Review the assumptions
Check how the calculation handles tax, compounding, fees, timing and changing rates.
Compare scenarios
Change one input at a time to understand which assumptions have the greatest effect.
Common questions
Money & Finance calculator FAQs
Are the money calculators free to use?
Yes. The calculators listed on this page are free to use and do not require an account or sign-up.
Are these calculators made for New Zealand?
Yes. The tools use New Zealand dollars, terminology and local rules or source material where those details affect the calculation.
Which calculator should I use for savings?
Use the Savings Calculator for a starting balance plus regular contributions. Use the Term Deposit Calculator for money placed at a fixed rate for a stated term.
What is the difference between the KiwiSaver and Retirement calculators?
The KiwiSaver Calculator focuses on KiwiSaver contributions and projected account growth. The Retirement Calculator takes a broader view of future retirement savings and a target.
Do the results include every fee and tax?
Not always. Each calculator explains what it includes. Provider fees, lender charges, changing rates, personal tax circumstances and other product terms can cause actual results to differ.
Are the calculator results financial advice?
No. The results are general estimates for education, planning and comparison. They do not take account of your complete financial position or replace personalised professional advice.
Keep exploring
Related sections
These calculators provide general estimates only. Actual returns, tax, fees, exchange rates, loan costs, KiwiSaver outcomes and retirement results can differ. Review the assumptions on each calculator page and seek appropriate professional advice for decisions that depend on your personal circumstances.