Simple. Fast. No sign-up.

Clean online calculators for everyday numbers.

Use quick tools for basic arithmetic, percentages, Australian GST, compound interest, and loan repayments. Everything runs in your browser.

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Calculator suite

Tools included

Basic calculatorAdd, subtract, multiply, and divide. Percentage calculatorFind percentages, ratios, and changes. GST calculatorAdd or remove 10% Australian GST. Compound interestEstimate investment growth over time. Loan calculatorEstimate monthly repayments. More calculatorsSavings, mortgage, discount, margin, and date tools.

Basic calculator

Arithmetic

Add, subtract, multiply, or divide two numbers.

Result will appear here.

Percentage calculator

Percentages

Calculate percentages, proportional percentage, and percentage change.

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GST calculator

Australian GST

Add or remove 10% GST from a price.

Result will appear here.

Compound interest calculator

Investment growth estimate

Estimate future value using regular compounding. This assumes a fixed rate and does not include tax, fees, inflation, or market volatility.

Result will appear here.

Loan repayment calculator

Monthly repayment estimate

Estimate principal-and-interest repayments. This is a guide only and does not include fees.

Result will appear here.

About this site

This is a lightweight static website. There is no database, login, tracking script, or server-side processing. It is designed to deploy cleanly through GitHub to Hostinger.