Personal Loan Calculators Australia — Every Tool You Need Before You Apply
Before you apply for a personal loan in Australia, the most expensive mistake you can make is skipping the maths. LoanGorilla's suite of nine free personal loan calculators covers every stage of the borrowing journey — from working out what you can comfortably borrow before you start, to figuring out how much faster you could pay off a loan you already have. No credit check required. No personal details needed.
Compare personal loans with LoanGorilla — 30+ lenders. See real rates. Real repayments. No hard credit pull.
Compare NowWhy run the numbers before you borrow?
Personal loans are sold on monthly repayments. That's no accident — a lower weekly number feels manageable in the moment and obscures what the loan actually costs over its full life. The gap between a well-structured personal loan and a poorly structured one can run to thousands of dollars in extra interest, all of it invisible if you only ever look at the fortnightly figure.
These calculators are built to make the full picture visible: total interest, total cost, the real impact of fees on your comparison rate, how extra repayments compound over time, and whether debt consolidation actually saves money on your specific mix of debts. Use them as a filter before you start comparing lenders, then compare lenders with LoanGorilla once the structure makes sense on paper.
All 9 calculators at a glance
| Calculator | Best used for | Link |
|---|---|---|
| Repayment Calculator | Estimate weekly, fortnightly or monthly repayments for any loan amount, rate and term. | Open → |
| Borrowing Power Calculator | Find out how much you can realistically borrow based on your income and expenses. | Open → |
| Debt Consolidation Calculator | See whether rolling multiple debts into one loan saves money — or quietly costs more. | Open → |
| Extra Repayments Calculator | Calculate how much time and interest you save by paying more than the minimum. | Open → |
| Comparison Rate Calculator | Reveal the true annual cost once application fees and ongoing fees are included. | Open → |
| Loan Comparison Calculator | Compare two or three loan offers side by side on total cost, not just headline rate. | Open → |
| Secured vs Unsecured Tool | Quantify the dollar saving from pledging an asset as security. | Open → |
| Affordability Calculator | Start from your budget, not a loan amount — find your comfortable borrowing ceiling. | Open → |
| Interest-Cost Timeline | Watch how cumulative interest builds month by month across different loan terms. | Open → |
Start here — planning your loan
These three calculators answer the questions you should ask before you compare a single rate.
1. Personal Loan Repayment Calculator
→ Open Personal Loan Repayment CalculatorThe starting point for almost every personal loan conversation. Enter a loan amount, interest rate, and term — get back your estimated weekly, fortnightly, and monthly repayments, plus total interest paid and total amount repaid.
Use it when:
- You know what you want to borrow and want to see what the repayments look like at different rates and terms.
- You're comparing multiple loan offers and want to see the total interest difference, not just the monthly figure.
- You want to stress-test your budget — what happens at 14% instead of 10%? What if the term is 7 years instead of 3?
Key features: Weekly / fortnightly / monthly toggle; principal-vs-interest breakdown; term comparison table.
Particularly useful for: Any loan purpose — car, renovation, wedding, travel, debt consolidation. The maths is the same regardless of why you're borrowing.
2. Personal Loan Borrowing Power Calculator
→ Open Personal Loan Borrowing Power CalculatorThe most honest calculator in the suite. It asks about your actual income and expenses — not just what you'd like to borrow — and estimates your real borrowing capacity based on what's left after your financial commitments.
Use it when:
- You want to know your number before you start comparing lenders.
- You're pre-qualifying your own situation to see roughly what lenders will see.
- You want to understand how existing debts, rent, or credit card limits affect your personal loan capacity.
Key features: Gross or net income input; expense and existing debt fields; affordability indicator; maximum loan amount across different terms.
Particularly useful for: First-time personal loan applicants, borrowers with existing debts, anyone who wants to borrow responsibly.
3. Personal Loan Affordability Calculator
→ Open Personal Loan Affordability CalculatorFlips the standard approach. Instead of starting with a loan amount, you start with your budget — your income, expenses, and the percentage of income you're comfortable allocating — and the calculator works backwards to your maximum comfortable borrowing.
Use it when:
- You know what you want to achieve but aren't sure how much you can safely borrow without strain.
- You want a budget health rating before you apply.
- You're borrowing for a specific purpose and want to see whether your budget covers the typical cost.
Key features: Loan purpose dropdown with cost benchmarks; budget allocation slider; budget health rating (Comfortable / Manageable / Stretched / Risky).
Particularly useful for: Purpose-driven borrowing (weddings, renovations, medical), cautious borrowers, anyone told they 'qualify for up to X' but wanting to know what fits their life.
Understanding costs — see past the headline rate
These three calculators help you see what a loan actually costs once fees, structure, and rate type are factored in.
4. Personal Loan Comparison Rate Calculator
→ Open Personal Loan Comparison Rate CalculatorA loan advertised at 7.99% p.a. with a $400 application fee and $12 monthly fee doesn't actually cost 7.99%. This calculator derives the comparison rate — the true annual percentage that folds in fees — using the same ASIC-standard internal rate of return method lenders use.
Use it when:
- You've been quoted an advertised rate and want to understand what the comparison rate adds to the picture.
- You're comparing two loans where one has a lower rate but higher fees.
- You want to estimate the comparison rate where it isn't clearly disclosed.
Key features: Application fee, monthly fee inputs; comparison rate derivation (IRR method); rate gap badge; total fees breakdown.
Particularly useful for: Any loan comparison, attractive headline rates with significant fee structures, smaller loans where fees have a proportionally larger impact.
5. Personal Loan Comparison Calculator (Side by Side)
→ Open Personal Loan Comparison Calculator (Side by Side)Two or three loan offers in front of you. This calculator puts them side by side so you can see which one actually costs less — not just which one has the lowest headline rate. Calculates monthly repayment, total interest, total fees, total cost, and comparison rate, then assigns a 'Best Overall' badge.
Use it when:
- You have multiple loan quotes and want a fair, apples-to-apples comparison on total cost.
- You suspect the cheapest-looking loan isn't actually cheapest once fees are included.
- You want to compare a fixed-rate and variable-rate offer on the same loan.
Key features: Compare 2 loans simultaneously; per-loan cost calculation; cheaper-option badge; dollar saving callout.
Particularly useful for: Borrowers with multiple quotes, anyone offered a low advertised rate but suspicious of fees.
6. Secured vs Unsecured Personal Loan Tool
→ Open Secured vs Unsecured Personal Loan ToolThe rate gap between secured and unsecured personal loans typically runs 2–8% p.a. On a $20,000 loan over 5 years, that's $2,000–$5,000 in additional interest on the unsecured option. This tool quantifies the dollar saving from pledging an asset.
Use it when:
- You own a car, motorbike, boat, caravan or term deposit and want to know if pledging it meaningfully reduces your loan cost.
- You're deciding whether to use a vehicle itself as security on a car loan.
- You've been quoted both and want to compare total cost across the full term.
Key features: Side-by-side cost comparison; interest saving banner; per-period saving; fees section.
Particularly useful for: Anyone with an eligible asset, car buyers, borrowers comparing both quote types.
Optimise the loan you have (or are about to take)
For loans you already have, or are about to commit to — these tools find the savings other calculators miss.
7. Personal Loan Extra Repayments Calculator
→ Open Personal Loan Extra Repayments CalculatorEvery extra dollar reduces the principal you owe — and less principal means less interest. This calculator shows exactly how much time and interest you save by paying more than the minimum on a personal loan you already have, or one you're about to take.
Use it when:
- You have spare cashflow and want to see the impact of an extra $50, $100, or $200 a month.
- You've received a windfall (tax refund, bonus) and want to model a one-off lump-sum repayment.
- You're deciding between extra repayments and refinancing.
Key features: Loan and rate inputs; extra repayment amount; total interest saved; months knocked off the loan.
8. Debt Consolidation Calculator
→ Open Debt Consolidation CalculatorJuggling credit cards, BNPL, store cards and personal loans is expensive and exhausting. This calculator shows what happens when you roll them into a single personal loan — and crucially, when consolidation doesn't work in your favour because extending the term costs more in total interest.
Use it when:
- You have two or more debts and want to see if consolidating saves money.
- You've been offered a consolidation loan and want to model the outcome before applying.
- You want to understand the term-extension trap.
Key features: Multi-debt entry; consolidation rate and term inputs; monthly vs total saving; warning when consolidation costs more.
9. Interest-Cost Timeline Visualiser
→ Open Interest-Cost Timeline VisualiserInterest on a personal loan is front-loaded — on a 5-year loan you can pay 60% of total interest in the first two years. This calculator makes that pattern visible. Compare up to three loan terms on a single chart, add a lump-sum repayment, watch the curve bend.
Use it when:
- You're comparing 3-year and 5-year terms and want to see the cost as a visual.
- You're considering an extra lump-sum repayment.
- You want to understand why early repayments matter more than later ones.
Key features: Up to 3 term comparisons on one chart; optional lump-sum analysis; cumulative interest line chart; saving-vs-longest table.
How to use the calculator suite together
Most personal loan decisions involve more than one question. Here's how the calculators work together.
Scenario: Taking out your first personal loan
- Affordability Calculator → start from your budget, not a loan amount
- Borrowing Power Calculator → cross-check against what lenders likely approve
- Repayment Calculator → stress-test repayments at the rate you'll likely get
- Compare lenders on LoanGorilla → find the best rate for your profile
Scenario: Consolidating credit card and other debts
- Debt Consolidation Calculator → check whether consolidation actually saves money
- Comparison Rate Calculator → check the true cost once fees are folded in
- Repayment Calculator → confirm the consolidated repayment fits your budget
- Compare consolidation loans on LoanGorilla → find the best rate
Scenario: Comparing multiple loan offers
- Loan Comparison Calculator → see which offer is genuinely cheapest on total cost
- Comparison Rate Calculator → verify rates where fees aren't clearly disclosed
- Secured vs Unsecured Tool → if both quoted, quantify the security saving
- Compare more lenders on LoanGorilla → check whether anyone else offers better
Scenario: Paying off a personal loan you already have
- Extra Repayments Calculator → see how much time and interest you save
- Interest-Cost Timeline → visualise interest month by month and lump-sum impact
- Check your loan contract → confirm extra repayments are allowed without fees
- Compare refinance options on LoanGorilla → if your rate is high, refinancing may save more
Personal Loan Calculators FAQ's
Compare personal loans — 30+ lenders, real rates
Find a loan that matches the numbers you've run. No hard credit pull.
Compare NowReviewed by LoanGorilla editorial team | Last updated: May 2026
All calculator results are estimates for general guidance only and do not constitute a quote, pre-approval, or personal financial advice. Actual loan costs depend on your individual credit profile, lender assessment, applicable fees, and product-specific terms. Comparison rates for marketed products are based on a $30,000 loan over 5 years and may not reflect all loan amounts, terms, or structures. LoanGorilla compares personal loans from 30+ lenders as of May 2026.