Glass priced the way a glazier bills it
Glass is billed on area, but not naively: each pane is charged at a minimum billable area however small it is, edge finishing runs by the linear foot of perimeter, holes and cutouts are priced each, and tempering is a surcharge on the billed area. This page follows that structure exactly. Enter your pane dimensions and count, the rate for your glass type and thickness, and the fabrication your panes need, and it builds the order line by line, shows the actual and billed areas side by side, applies any shop minimum openly, and reports the total and the cost per pane, with a downloadable estimate.
The panes
Fabrication
Fitting and delivery
Minimum, contingency, tax and range
Disclaimer: This calculator gives estimates for general information only. It is not financial, medical or other professional advice. Safety glazing is required by code in hazardous locations such as doors, low windows and wet areas; your glazier confirms the specification the law requires for each position.
What this calculator does
It prices a glass order in the glazier’s own billing structure, which differs from simple area pricing in three ways that routinely surprise buyers. Each pane bills at no less than a minimum area, so small panes cost more per actual foot than large ones. Edge finishing is charged on perimeter, so shape matters: a long narrow pane carries more edge than a square one of equal area. And fabrication (holes, cutouts, tempering) is priced as operations on the pane, sequenced before tempering because tempered glass cannot be worked afterwards. Installation is separated per pane and delivery stands flat, and the results show actual area against billed area so the minimum’s effect on your order is visible rather than buried in a unit price. The standard close follows: shop minimum openly, contingency once, tax once, cost per pane and a downloadable estimate.
How to use it
- Price each size separately. A minimum area per pane and a per-foot edge rate make mixed orders non-additive: three sizes in one averaged run produce a fiction. Run each distinct pane size through the page and add the totals, exactly as the glazier’s invoice will list them.
- The rate carries the specification, so specify first. Float against laminated against low-emissivity, 4 against 10 millimetres, are different prices per square foot before any fabrication. Get the rate for the exact glass the position requires (safety locations are not optional, as the disclaimer notes) and the rest of the arithmetic follows honestly.
- Edge finish is a safety and appearance decision with a price. Raw cut edges are sharp and chip-prone; polished edges are for exposed glass. The per-foot field prices the choice openly, and on frameless work (showers, balustrades, tabletops) the edge line is a significant share of the order, not a garnish.
- Order fabrication before tempering, in life as on this form. Every hole, notch and polished edge must exist before the pane is heat treated, after which it can never be cut again. A measurement error in tempered glass is a full repurchase, which is why templates and site measures have their own line here on critical panes.
- Small panes are minimum-area panes. A cabinet door pane of half a square foot billed at a 2 square foot minimum costs four times its naive area price, legitimately. Knowing the minimum before designing a grid of small panes is worth real money, and splitting or combining panes on paper is the cheapest fabrication there is.
How it is calculated
- Actual area per pane = width x height / 144 square feet. Billed area per pane = the larger of actual area and the minimum billed area entered. Billed glass area = billed area per pane x quantity. Glass = billed area x rate per square foot.
- Edge finishing = total perimeter (quantity x 2 x (width + height) / 12 feet) x edge rate. Holes and cutouts = count x price each. Tempering = billed glass area x tempering surcharge. Installation = quantity x per-pane rate. Delivery and other charges enter flat.
- Subtotal = the sum of the lines, each rounded to cents. Shop minimum: if a minimum charge is entered and exceeds the subtotal, the minimum becomes the base and the results state that the minimum charge applied. Contingency applies once to the base; tax once to base plus contingency. Total = base + contingency + tax. Per pane = total / quantity. Range = total less and plus your percentage.
Worked examples
Three fabricated panes. Illustrative figures: 3 panes at 24 by 36 inches is 6.00 square feet each, 18.00 billed (above the 2 square foot minimum). Glass at $14 a square foot is $252.00. Edge finishing: 10 feet of perimeter per pane, 30 feet at $3.50, is $105.00. Four holes at $12 add $48.00. Tempering at $4 per billed square foot adds $72.00. Installation at $55 a pane is $165.00; delivery $45. Total: $687.00, or $229.00 per pane.
Where fabrication takes the order. The glass itself is $252.00 of that $687.00, barely a third: edges, holes, tempering and fitting are $390.00. A quote compared on its per-square-foot glass rate alone can look cheaper while being dearer as an order, because glass is the minority of a fabricated order’s price. The lines here are listed in the order a glazier builds them for exactly that reason.
One small pane, both minimums. A single 10 by 10 inch pane measures 0.69 square feet and bills at the 2 square foot minimum: glass $28.00 at the same $14 rate. Against a $75 shop minimum charge, the estimate builds on the minimum and totals $75.00, stating that the minimum charge applied. Small glass is priced by minimums at both levels, per pane and per order, and this example is the two of them meeting.
Reading your results
Compare the actual and billed areas first: their gap is the minimum area at work, and on orders of small panes it is the largest single pricing fact. Then read the fabrication share; where it dominates, value engineering means changing the fabrication (fewer holes, simpler edges) rather than shopping the glass rate. Finally, use the per-pane figure only within one size: $229.00 a pane describes these fabricated panes, and quoting it onward to a different size or specification borrows a number that has already spent its meaning.
Limitations
- Shaped and oversized panes break flat structures. Curves, rakes and panes beyond stock sheet sizes price by individual quotation, with yield from the sheet driving the real cost. This page handles rectangular panes at a uniform rate; a shaped pane’s quote belongs to the glazier’s nesting, not to area arithmetic.
- Sheet yield is inside the rate. Your glazier’s per-foot price already carries the waste of cutting your sizes from stock sheets. Unusual sizes that nest badly may attract a surcharge no field here predicts; the contingency is the honest carrier for it.
- Site conditions decide installation. Access, height, existing frame condition and whether the old glass is itself hazardous all move the per-pane fitting figure. The rate entered is the one your installer quoted for your site; a generic rate makes the line a placeholder.
- Breakage between order and fitting is a contract matter. Who carries a pane broken in transit or on site is decided by your agreement with the supplier, and a replacement pane re-runs this entire costing. The estimate prices the order as specified, once.
Frequently asked questions
Why is there a minimum billed area per pane?
Because a glazier’s costs attach to the pane, not to its size: cutting, handling, edge safety, packing and breakage risk are nearly the same for a one foot pane as a three foot one, and the material saved is the smallest part of the job. Billing small panes at a floor area keeps the price attached to the work. Its effect is concentrated where you would expect: the worked example’s small pane bills 2.00 square feet for 0.69 actual, while the large panes bill exactly their area.
What does tempering add, and when is it required?
Tempering is a heat treatment that multiplies the glass’s strength and makes it break into small blunt granules rather than shards; priced here as a per-billed-foot surcharge ($72.00 on the example’s order). It is required by safety codes in hazardous positions (doors and sidelights, low glazing, bathrooms and wet areas, balustrades) and chosen elsewhere for strength. Two practical consequences follow: the specification for each position is a legal question your glazier answers, and all fabrication must precede it, because tempered glass cannot be cut, drilled or ground afterward at all.
How is edge finishing charged?
By the linear foot of edge treated, because the work runs along the perimeter: grinding and polishing a pane’s four sides consumes time in proportion to their length. On the worked example, each 24 by 36 inch pane carries 10 feet of edge, 30 feet across the order at $3.50 is $105.00. Shape therefore has a price: two panes of equal area, one square and one long and narrow, differ in edge cost by their perimeters, which is why this page takes both dimensions rather than an area alone.
Can I save by collecting and fitting the glass myself?
The installation and delivery lines price exactly what you would save: $165.00 and $45.00 on the worked example. Against that stand transport risk (glass travels badly in unsuitable vehicles), the absence of a fitting warranty, and the positions where safety glazing and correct bedding are regulated work. For a simple shelf or cabinet pane the saving is real; for a shower screen or a low window the lines are cheap insurance. The page’s separation of the two charges exists so the decision is made on figures, either way.
Related calculators
Method: glazier billing structure at user-entered rates, minimum billable area per pane applied before pricing, edge work on total perimeter, tempering on billed area, shop minimum applied to the base, contingency once and tax once, exactly as defined on this page. Last reviewed: 13 October 2026.