Free Australian Calculators
for Everyone, Every Day

Mortgage, income tax, GST, stamp duty, superannuation, business ROI, AI tools and much more. Accurate. Free. Australian.

100+
Calculators
100%
Free
🇦🇺
Current Rates
💰 Finance Calculators
🏠
Mortgage Repayment
Monthly, fortnightly or weekly home loan repayments. P&I or interest-only.
⭐ POPULAR
📈
Compound Interest
Savings, investments and superannuation growth with regular contributions.
💳
Loan Repayment
Personal, car, and business loan repayments with total interest cost.
🎯
Savings Goal
How long to reach your savings goal, or how much to save each week.
📊
Investment Return
Calculate CAGR, total return and profit on shares and investments.
🌟
Superannuation Projector
Project your super balance at retirement using current SG rates.
🇦🇺 Australia
💳
Credit Card Payoff
How long and how much interest to pay off your credit card balance.
🧾 Tax Calculators
🧾
Income Tax Calculator
Australian income tax with current ATO rates, LITO, Medicare levy & HECS.
⭐ POPULAR
🧮
GST Calculator
Add or remove 10% GST instantly. Ex-GST, inc-GST and GST amount.
🇦🇺 Australia
📉
Capital Gains Tax
Calculate CGT on shares, property and assets. Includes 50% discount.
💼
Payroll Tax
Payroll tax by state — NSW, VIC, QLD, WA, SA, TAS, ACT, NT.
🇦🇺 Australia
🏡 Property & Real Estate
📋
Stamp Duty
Stamp duty for all Australian states. FHB concessions included.
⭐ POPULAR
🏘️
Rental Yield
Gross yield, net yield and cash flow for investment properties.
🔑
Property Buying Costs
Total upfront costs: stamp duty, conveyancing, LMI, inspections.
❤️ Health Calculators
⚖️
BMI Calculator
Body Mass Index with healthy weight range and WHO category.
⭐ POPULAR
🍎
Calorie Calculator
Daily calorie needs by age, weight, height, activity and goal.
🔨 Construction Calculators
🪨
Concrete Calculator
Concrete volume for slabs, circles and columns. AU pricing.
🇦🇺 Australia
🪵
Flooring Calculator
Flooring material and installation costs with wastage allowance.
💼 Business Calculators
💹
Markup & Margin
Calculate selling price, gross profit, and margin from cost price.
⚖️
Break-Even Calculator
Units and revenue needed to break even on fixed and variable costs.
🚀 AI & Business Growth Calculators
🚨
Missed Lead Cost
Annual revenue lost from slow response and missed follow-up.
🔥 HIGH IMPACT
📞
Missed Call Revenue
Dollars lost from unanswered and missed calls.
🔥 HIGH IMPACT
🤖
AI Investment ROI
Return on investment from AI automation tools.
⏱️
Admin Time Saving
Hours and dollars saved by automating admin tasks.
🌐
Website Lead Value
True dollar value of your website traffic and conversions.
📣
Marketing ROI
Return on every marketing dollar spent.
👥
Staff Productivity Cost
Revenue lost from below-peak team productivity.
🗂️
CRM ROI
Return on investment from implementing a proper CRM.
💎
Customer Lifetime Value
True long-term value of each customer you acquire.
📝
Quote Follow-Up Loss
Revenue lost when quotes go without follow-up.
🧮 Utility Calculators
%
Percentage Calculator
3 modes: X% of Y, X is what % of Y, and percentage change.
⭐ POPULAR
🏷️
Discount Calculator
Final price after percentage or dollar discount.
🎓 Student Calculators
🎯
Final Grade Calculator
Calculate the exam score needed to achieve your desired final grade.
🎓 Student
📊
GPA Calculator
GPA from multiple subjects using the Australian 7-point grading scale.
⭐ POPULAR
⚖️
Weighted Grade Calculator
Overall grade across assessments with different weights.
✅
Pass Mark Calculator
What exam score you need to pass the subject.
%
Percentage Calculator
Three modes: X% of Y, X is what % of Y, and percentage change.
📅
Assignment Deadline Planner
Plan study schedule and daily hours needed before a deadline.
🎓 Student
⏱️
Study Hours Calculator
Recommended study time per subject based on difficulty and timing.
∑
Average Calculator
Mean, min, max, median and range from a list of numbers or marks.
📉
Standard Deviation Calculator
Sample or population standard deviation with variance and mean.
💰
Student Budget Calculator
Track weekly income vs expenses and plan your student budget.