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Free calculators for money, business, home projects, energy and everyday maths. Choose a tool, enter your figures, and see how the result is worked out.
Try a mortgage calculation
Your figures. Your monthly repayment.
Estimated monthly repayment USD
Principal and interest at a fixed rate. Excludes fees, taxes and insurance.
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Explore money, home, energy and everyday tools, with regional tax calculators clearly labelled.
- MoneyNZ mortgage calculator: repayments, refix and affordability
Compare NZ mortgage repayments, refix changes and a borrowing budget.
- MoneyNZ GST calculator
Add GST or find the tax included in a price.
NZ$100 + 15% GST = NZ$115
- MoneyNZ take-home pay calculator
Estimate your pay after New Zealand deductions.
- MoneyCompound interest calculator
Explore how savings grow with regular deposits.
- Home & materialsNZ building cost per square metre
Estimate building costs from floor area and budget.
- MoneyNZ PAYE tax calculator
Estimate NZ income tax and payroll deductions.
- BusinessProfit Margin Calculator
Work out profit as a share of revenue.
- EnergyNZ solar simple payback
Compare solar installation costs with annual savings.
- Home & materialsConcrete volume and bags
Estimate concrete volume for a rectangular pour.
- MoneyUK take-home pay — 2026/27
Estimate UK pay after tax and National Insurance.
- MoneyAustralia income tax & Medicare — 2026/27
Estimate Australian income tax and Medicare levy.
- MoneyUS paycheck estimate — 2026
Estimate US pay after federal deductions.
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Plan borrowing, savings and tax.
27 calculatorsEstimate materials for your next project.
5 calculatorsCompare energy costs and potential savings.
2 calculatorsCompare costs, margins and returns.
4 calculatorsWork out percentages and everyday sums.
1 calculatorFind a tool for your next calculation.
1 calculatorUnderstand the answer
Start with your figures
Choose a tool and enter the amounts, dates or measurements you want to work with.
Explore the result
Change an input to compare scenarios and see what makes a difference.
See how it works
Read the formula, worked example and limitations before using your estimate.
Find the right calculator
Money & business
- NZ PAYE tax calculator
- NZ take-home pay calculator
- NZ GST calculator
- NZ provisional tax calculator
- NZ holiday pay calculator
- NZ redundancy payout calculator
- NZ ACC earner levy calculator
- NZ student loan repayment calculator
- NZ KiwiSaver retirement projection
- NZ KiwiSaver contribution calculator
- NZ mortgage calculator: repayments, refix and affordability
- NZ rental yield calculator
- NZ bright-line period calculator
- First-home deposit timeline NZ
- AU FIFO roster gross pay
- NZ fringe benefit tax scenario
- Compound interest calculator
- Profit Margin Calculator
- Markup Calculator
- Break-Even Calculator
- Hourly to Salary Calculator
- US paycheck estimate — 2026
- UK take-home pay — 2026/27
- UK stamp duty — England & Northern Ireland
- Australia income tax & Medicare — 2026/27
- Pension Tax Allowance & the 53% taper zone (£13,037–£13,319) — 2027/28
- Tradie job quote calculator
- UK £100k tax trap calculator
- UK High Income Child Benefit Charge calculator
- AU $1,000 work expense deduction calculator
- US no tax on tips and overtime calculator
Everyday sums
Home & materials
Use the right local rules
Tax and property rules depend on where you live. Choose a region before entering your figures.
Quick answers
Can I compare different scenarios?
Change an input to compare scenarios and see what makes a difference.
Are calculator results professional advice?
No. Results are estimates, not professional advice. Check the assumptions before relying on an estimate.
Which region should I choose?
Tax and property rules depend on where you live. Choose a region before entering your figures.