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Instant Estimate Tool

See Your Price
Before You Call

Accurate within 10%. No email required to see your number. Most lead-capture tools gate the value behind a form — we don't.

  • Accurate within ±10%
  • No email required
  • Takes 90 seconds
  • From $495/m²
  • Accurate within ±10%
  • See your price first
  • No sales calls
  • 10-Year Warranty
  • Result in 90 seconds

How It Works

Three steps. Under 2 minutes. No obligation at any stage.

Jump to calculator
  1. Enter Your Details

    Window count, typical size, and glass type. Takes under 90 seconds on any device.

  2. See Your Number

    Your estimate appears immediately. No email required. Accurate within ±10% of the final invoice.

  3. Book Your Assessment

    When ready, a King technician visits for a precise measure-up and locks in your contractual price.

Decision Guide

How to Pick Your Glass

Start here. One question determines everything — do you want less heat or less noise?

Goal A

Less Heat

  1. 1

    Start with Low-E glass. The metallic oxide coating reflects solar heat before it enters — cutting heat transfer by up to 69% compared to standard clear.

  2. 2

    North-facing windows get priority. North and west elevations receive the most sun exposure in Melbourne's climate. These are the rooms where Low-E delivers the greatest return.

  3. 3

    For extra help, choose Tinted Low-E. The tint layer further reduces Solar Heat Gain Coefficient (SHGC) — ideal for any room that overheats in summer or faces full afternoon sun.

Recommended glass

Tinted Low-E

U-value 1.8 · 78% heat reduction · from $595/m²

Use Tinted Low-E in My Estimate

Goal B

Less Noise

  1. 1

    Check the Rw ratings below. Rw (weighted sound reduction index) shows how much noise the glass blocks in decibels. Each 3 dB increase roughly halves perceived loudness.

  2. 2

    Choose your acoustic level. Standard Laminated adds a PVB interlayer for baseline dampening. Acoustic PVB Laminated uses a specialist acoustic interlayer — it reduces a bit more sound and is our recommendation for roads, trams, and flight paths.

  3. 3

    Select your option in the estimate form. The Rw difference is real but the cost gap is small — most customers choose Acoustic PVB for the extra performance margin.

GlassRwNoise reduced

Standard Double Glazing

35 dB

39%

Standard Laminated

38 dB

45%

Acoustic PVB Laminated

Recommended

42 dB

52%

Use Acoustic Glass in My Estimate

Not sure which applies to you? Call us — we'll advise per elevation, no site visit required.

The Tool

Your Instant
Double Glazing Estimate

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Estimate is indicative only. Free on-site measure confirms exact dimensions and final price before any work begins. See cost guide and glass types for more detail.

FAQ

Estimate FAQ

Common questions about the tool and how it works.

How accurate is the instant estimate?

Within ±10% of the final invoice price for standard retrofit jobs. The estimate uses your window count, typical glass area, and the same base rates we charge on site. The only variable that can shift the final price is if a site measure reveals an unusual frame condition — which we flag before ordering any glass.

Do I have to give my email to see the estimate?

No. Your estimate appears the moment you hit Calculate — no email, no phone number, no obligation. We believe in showing you the number first. You can optionally enter your email if you want a formal PDF quote sent to you.

What window sizes should I enter?

Select the size category closest to your typical window. Standard casement and sash windows in Melbourne are usually 0.9–1.0 m². If you have a mix of sizes, pick the most common one — the ±10% accuracy absorbs small variations. A precise measure-up during the free assessment confirms the final area.

Which glass type should I choose?

Standard Clear is the best starting point for most Melbourne homes. Upgrade to Tinted Low-E if you have west-facing rooms that overheat, Acoustic Laminated if you live near a main road or flight path, or Triple Glazed for maximum thermal performance. The calculator shows you the price difference in real time.

Is the estimate inclusive of installation?

Yes. Every estimate includes the glass unit, professional installation, frame preparation, safe disposal of your old glass, and cleanup. There are no separate labour charges. The only potential extras are scaffolding for inaccessible upper-storey windows (rare) and frame remediation if a frame is structurally compromised (very rare).

How do I go from estimate to installed windows?

After the estimate, book a free on-site assessment. A King technician measures each window precisely, confirms the spec, and provides a binding written quote (usually within 24 hours). Once you sign off, we order the glass and install within 2–3 weeks. The whole process from estimate to installation typically takes 3–4 weeks.

Does the estimate include the VEU government rebate?

The base estimate shows full price so you understand worst case. VEU rebates for eligible properties typically offset $300–$900 on a standard home job. We calculate and lodge your rebate paperwork — you receive a reduced invoice, not a claim to chase yourself.

Can I estimate a single room rather than the whole house?

Absolutely. Enter only the windows you want done now. There's no minimum order size. Many customers start with one west-facing or street-facing room and add the rest later once they experience the difference. Per-m² pricing is the same regardless of quantity.

Ready for theFormal Quote?

Once you have an estimate you're happy with, book a free on-site assessment. A King technician measures precisely and issues a contractual quote — price locked, no surprises.

No site visit required

Price locked at quote

10-year warranty

Melbourne-wide