What is Workshop Wrench?

Workshop Wrench is an Australian-native auto repair shop management platform. It includes a drag-and-drop job board, digital vehicle inspections (DVI), estimates with line-item customer approval, GST-compliant invoicing, owner KPI dashboard, and a B2B Parts Exchange marketplace.

Is Workshop Wrench built for Australian workshops?

Yes. Workshop Wrench is designed specifically for Australian independent auto repair shops — it handles GST invoicing, AUD pricing, and Australian business workflows out of the box.

How much does Workshop Wrench cost?

Plans start from $149/month AUD (ex. GST) for the Starter tier. Growth is $249/month and Scale is $449/month. All plans include unlimited jobs, no per-technician seat fees, and a 14-day free trial.

Can I try Workshop Wrench without signing up?

Yes. The live demo is available immediately at workshopwrench.com.au/demo — no form, no credit card, and no sales call required. You get real credentials to a seeded garage with guided playbooks.

Does Workshop Wrench support digital vehicle inspections (DVI)?

Yes. Workshop Wrench includes a built-in DVI tool that lets technicians complete inspections on any device, attach photos, and share results with customers via the customer portal for instant approval.

What is the Parts Exchange in Workshop Wrench?

Parts Exchange is a B2B parts marketplace built into Workshop Wrench. It lets independent workshops source parts from wreckers, suppliers, and other shops across Australia — reducing procurement time and cost.

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AU Workshop Calculators

Name: Workshop Wrench
Brand: Workshop Wrench

Labour rate, GST, profitability, and tyre size — reactive calculators built for Australian workshops. Results update instantly as you move the sliders.

All calculators are illustrative only. Consult your accountant or tax advisor for financial decisions. All figures AUD.

AU Labour Rate Calculator

Enter your tech hourly rate, overhead percentage, and desired gross margin to get the recommended charge-out rate with a full cost breakdown.

Tech hourly rate$35/h

$20/h$100/h

Overhead %85%

20%200%

Desired gross margin25%

5%60%

What to include in overhead %

Rent, power, insurance, tool depreciation, consumables, and management wages — everything except direct tech wages and parts.

Breakdown

Tech cost$35.00/h

Overhead (85%)$29.75/h

Loaded cost$64.75/h

Gross profit at target margin$21.58/h

GP %25.0%

Recommended charge-out rate$86.33/h

Charge-out = Loaded cost ÷ (1 − margin%). All AUD, ex. GST. Consult your accountant for final rate-setting.

GST Calculator

Convert between ex-GST and inc-GST instantly. Build a running total across multiple line items.

Quick converter

Amount ex-GST ($)

Amount inc-GST ($)

Running total — multiple items (ex-GST amounts)

Subtotal (ex-GST)$0.00

GST (10%)$0.00

Total (inc-GST)$0.00

Workshop Profitability Check

Enter revenue, COGS, and overheads to see GP%, net margin, and break-even repair orders per month.

Weekly revenue$12,000

$1000$80000

COGS (parts & materials) %30%

5%70%

Weekly overhead (rent, wages, etc.)$3,000

$500$30000

Average repair order value$520

$100$3000

Results

Annual revenue$624,000

COGS (30%)-$3,600/wk

Gross profit$8,400/wk

GP %70.0%

Weekly overhead-$3,000/wk

Net profit$5,400/wk

Net margin45.0%

Break-even ROs / month36 ROs

Profitable. You need 36 ROs/month to cover overhead.

Tyre Size Converter

Convert metric tyre sizes (e.g. 225/45R17) to imperial dimensions. Get full tyre geometry — diameter, sidewall, circumference, and revs per km.

Metric size: 225/45R17

Section width (mm)225mm

135mm355mm

Aspect ratio45%

25%80%

Rim diameter (inch)17"

13"24"

Sidewall height (mm) = width × aspect ÷ 100. Overall diameter = rim × 25.4 + 2 × sidewall. Actual tyre dimensions vary by manufacturer and load index.

Tyre geometry

Metric size225/45R17

Section width8.86" (225mm)

Sidewall height3.99" (101.3mm)

Overall diameter24.97" (634.3mm)

Rim diameter17"

Circumference1.993m

Revolutions per km501.8

Put these numbers into action

Track your actual ARO, GP%, and labour rate in Workshop Wrench

The KPI dashboard calculates GP%, labour efficiency, and ARO automatically from your real repair order data — no spreadsheets, no manual entry.

Request a demo →See pricing

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