IS 1200 Method of Measurement: All 28 Parts, Deduction Rules & Free Measurement Sheet

Every RA bill dispute on an Indian site eventually lands on the same question: what does IS 1200 say? A window opening the contractor billed at full plaster area and the consultant deducted at 50%. A lintel bearing the billing engineer deducted from brickwork that should never have been deducted. Binding wire someone tried to bill by weight. IS 1200 — the Bureau of Indian Standards' Method of Measurement of Building and Civil Engineering Works — is the rulebook that settles all of it, and almost nobody on site has actually read it.

This guide is the reference we wished existed: the complete, current list of all 28 parts (13 of them were quietly re-issued between 2024 and 2026 — most tables on the internet still show 1970s editions and at least one wrong title), the deduction thresholds for every major trade in one matrix, the full plaster deduction decision tree, the painting coefficient table, and a free IS 1200-style measurement sheet in Excel that books quantities in L × B × D order with deduction rows built in.

What IS 1200 actually is#

IS 1200 is not one document. It is a family of standards published part-wise by BIS through its CED 44 committee (Methods of Measurement of Works of Civil Engineering), with one part per trade: earthwork is Part 1, concrete Part 2, brickwork Part 3, formwork Part 5, plastering Part 12, and so on through Part 28. Each part answers three questions for its trade:

• What unit is the work measured in — cubic metres, square metres, running metres, kilograms, or numbers.
• How dimensions are booked — always length first, then breadth or width, then height, depth, or thickness, to a stated rounding precision.
• What is deducted and what is ignored — the opening, void, and embedded-item thresholds that decide real money.

Its legal force comes from your contract. Government tenders almost universally carry a precedence clause along the lines of: measurement shall follow the CPWD Specifications; for items where they are silent, IS 1200 (latest edition) shall apply. Private contracts often invoke IS 1200 directly. Either way, when the contract's own specification does not state a mode of measurement, IS 1200 is the fallback that auditors, arbitrators, and courts reach for. For how measurement fits into the overall estimate, see our guide to building estimation and costing.

Edition warning (this matters in 2026). BIS re-issued a large slice of the series recently: Parts 6, 11, 13 and 27 in 2024; Parts 2, 5, 22 and 25 in 2025; Parts 1, 3, 4, 9 and 12 in 2026. The freely available scans everyone quotes (including the clause numbers in this article) are the earlier editions — 1974 to 1994 vintage — which governed Indian measurement practice for five decades. If your contract says "IS 1200, latest revision", it now points at the new editions, which are sold by BIS and not free to download. Before you fight a deduction in an RA bill, check which edition your contract actually invokes.

All 28 parts of IS 1200 — the current list#

This table reflects the BIS CED 44 published-standards dashboard as of August 2026. Note three things most online lists get wrong: Part 17 (road work) stands withdrawn, Part 26 is acid resistant lining (not acoustics), and 13 parts now carry 2024–2026 edition years.

Twenty-eight parts were published; twenty-seven remain in force. If a coaching-site table tells you Part 26 is "acoustics" or shows Part 12 as "1976" with no caveat, you are reading a stale copy-paste.

Units, booking order, and rounding#

The general clauses repeat across parts, and they are the spine of a defensible measurement sheet:

• Booking order is always L × B × D — length, then breadth or width, then height, depth, or thickness. A sheet that books breadth first is not "wrong quantity", but it is instantly harder to check, and checkability is the whole point.
• Dimensions are recorded to the nearest 0.01 m in most trades. Key exceptions: concrete slab thickness to 0.005 m (Part 2), reinforcement lengths to 0.005 m and steel mass to the nearest 1 kg (Part 8), woodwork cubic contents to 0.001 cum (Part 21).
• Areas round to 0.01 sqm and volumes to 0.01 cum; final values are rounded per IS 2, the BIS rounding standard referenced in every part's foreword.
• Units by trade: earthwork and concrete in cum; brickwork in cum, except walls one brick thick or less, which are measured in sqm stating thickness; formwork in sqm of contact area; plaster, pointing, and painting in sqm, with narrow bands measured in running metres (girth up to 30 cm for plaster, 10 cm for painting); reinforcement and structural steel in kg; DPC in sqm.
• Work below ground datum, in water, mud, foul positions, or tidal conditions is always measured separately — mixing it into ordinary items is a classic source of underpayment.

The deduction matrix — every threshold in one table#

This is the table we could not find anywhere else, so we built it. "No deduction" means the opening or embedded item is ignored and the wall, slab, or surface is measured solid through it.

Memorise three numbers and you will win most site arguments: 0.1 sqm for brickwork and concrete, 0.4 sqm for formwork, 0.5 sqm for all finishes.

Earthwork (Part 1): leads, lifts, and working space#

Earthwork disputes are less about deductions and more about what counts as a separate payable item:

• Excavation is measured net, as excavated — no allowance for bulking, and none for the extra digging a sloppy excavator did beyond neat lines.
• Lifts run in stages of 1.5 m, stating the commencing level. Depth up to 1.5 m is included in the base item; each further 1.5 m stage is an extra-lift item.
• Lead (haul distance) is measured along the shortest practicable route: units of 50 m up to 250 m, one item for 250–500 m, then units of 500 m up to 5 km, and kilometre units beyond.
• Working space is payable where the drawing or the work genuinely requires men to operate outside the structure face (formwork, waterproofing, protective masonry): the authorised default is 600 mm from the face of the substructure at the lowest level.
• Trenches deeper than 1 m earn an authorised widening of 50 mm per metre of depth per side — a clause few billing engineers know exists.
• Dead-men or tell-tales (the earth pillars left standing to prove original ground level) are not measured separately, either for leaving or for later removal — they are part of the excavation item.
• Soil is classified into six categories, from soft soil through hard rock where blasting is prohibited, and each classification is measured separately. Get the classification recorded jointly at excavation time; it cannot be reconstructed after backfilling. That joint record lives in the joint measurement sheet.

Concrete (Part 2): where the volume rules live#

• Beams are measured face-to-face of columns; beam depth runs from the bottom of the slab to the bottom of the beam. Columns run from the top of the base or footing to the underside of the slab.
• A chajja up to 100 mm average thickness is measured as a chajja; thicker, and it becomes a slab — a distinction that changes the applicable rate.
• No deduction is made for the volume occupied by reinforcement, nor for embedded pipes and conduits up to 100 sq cm in cross-section, nor for openings up to 0.1 sqm. That last threshold is an area test — a surprising number of exam-prep sites quote it as 0.1 cum, which is wrong by the text of the clause.
• Slab thickness is booked to the nearest 5 mm, everything else to 10 mm.

Formwork (Part 5): contact area, nothing else#

Formwork is measured in square metres of actual contact area with the concrete. Not the plywood you bought, not the props you deployed — the area touching concrete. Openings up to 0.4 sqm are ignored; so are the junctions where secondary beams meet main beams and beams meet columns. Slabs above 200 mm thickness, beams deeper than 1 m, and soffits sloping beyond 30 degrees are all measured as separate items. Whether shuttering is a separate BOQ item or buried inside a composite concrete rate is a contract decision, not a measurement one — our shuttering and formwork guide covers the rate side in depth.

Plastering (Part 12): the decision tree behind every opening dispute#

The 0.5 sqm and 3 sqm bands generate more RA-bill arguments than any other clause in the series. Here is the complete logic for an opening in a plastered wall:

Opening up to 0.5 sqm — no deduction, and no addition for jambs, soffits, or sills. The standard treats the reveal work you did as fair compensation for the opening area you billed but did not plaster.

Opening above 0.5 sqm and up to 3 sqm — still no addition for jambs and soffits, and the deduction depends on the reveal geometry:

1. Both faces of the wall plastered with the same plaster: deduct the opening from one face only.
2. Faces carry different plasters (or one is pointed): deduct from the side where the reveal (the door or window frame set-back) is smaller; if the reveals are equal, deduct 50% of the opening on each face.
3. Only one face plastered: full deduction if the frame sits closer to the plastered face; no deduction if it sits at the centre or closer to the far face.
4. Frame as wide as the wall (or projecting): full deduction from each plastered face.

Opening above 3 sqm — deduct the full opening from each plastered face, and measure the jambs, soffits, and sills as plastering in their own right.

Worked example: a 1.2 m × 1.5 m window (1.8 sqm) in a 230 mm wall, both faces in 12 mm cement plaster. The opening falls in the 0.5–3 sqm band, same plaster both sides, so deduct 1.8 sqm from one face only — the other face is measured solid, and nobody measures the jambs. If the consultant deducts both faces, that is 1.8 sqm of plaster recovered per window; across a 200-window residential block, the clause is worth real money.

Painting (Parts 13 and 15): the coefficient table#

Painted joinery and metalwork is not measured by tape gymnastics around every panel. You measure the shutter flat (frame included) and multiply by a standard coefficient:

Corrugated sheeting is measured flat and then increased — 14% for GI corrugated, 20% for AC corrugated. Textured wall finishes carry their own loadings under Part 13: sand-faced plaster +50%, rough cast +100%, pebble dash +275%. The most common site overbilling: a grill painted both sides billed at 2.0×. The standard says 1.00 all over — the open spaces already compensate for painting both faces of each bar.

Steel and reinforcement (Part 8): computed mass, not weighed mass#

• Structural steel and reinforcement are paid by calculated mass, not weighbridge slips: measure lengths, convert through standard section masses from the relevant Indian Standards (for rebar, in practice, the nominal mass tables under IS 1786), and round the final mass to the nearest kilogram.
• Reinforcement is measured along the bar in running metres to 5 mm precision, including hooks, cranks, and bends. Authorised laps and chairs are measured and paid. Unauthorised laps — the ones your bar bender introduced to use up offcuts — are not.
• Binding wire is never measured; it is deemed included in the reinforcement rate. So is weld metal. Riveted structures gain a flat 2.5% mass allowance for rivet heads.
• The bar-wise computation lives in the bar bending schedule; our BBS guide and free format covers cutting-length arithmetic, and the steel reconciliation statement closes the loop between steel issued and steel billed.

IS 1200 vs CPWD: which one governs your bill?#

For government work, the answer is written in the tender. The standard precedence clause makes the CPWD Specifications govern first, with IS 1200 (latest edition) applying to anything they are silent on. In practice the CPWD measurement clauses reproduce the IS 1200 regime almost verbatim — the 0.5/3 sqm plaster bands, the 0.1 sqm masonry threshold — with occasional deviations, so on a CPWD or state-PWD job you must check the spec clause before quoting the IS clause. The rates themselves come from the Delhi Schedule of Rates; see our CPWD DSR guide for how DSR items, nomenclature, and cost indices work.

Private contracts frequently skip a spec of their own and simply write "measurement as per IS 1200". That makes the standard directly binding — including its edition question. A contract signed in 2023 invoking "IS 1200 (Part 12), latest revision" originally pointed at the 1976 text; today it points at the 2026 Fourth Revision.

Two companion standards complete the picture. SP 27, the BIS Handbook of Method of Measurement of Building Works, is the official illustrated companion — sketches of what the clauses mean. IS 3861:2002 governs the measurement of plinth, carpet, and rentable area of buildings — a different job from IS 1200's work quantities, and not the same thing as RERA carpet area, which has its own statutory definition under Section 2(k) of the RERA Act.

From standard to sheet: how measurement actually gets recorded#

Knowing the clauses is half the job; recording quantities so they survive an audit is the other half. The chain on a well-run site is:

1. Measurement sheet — the working computation: item description, location reference, Nos, L, B, D, and quantity, with deductions entered as explicit negative rows citing the clause. Download our free IS 1200-style measurement sheet format — it books dimensions in the standard order, carries a deduction column, and ships with a quick-reference sheet of the thresholds in this article.
2. Joint measurement — contractor and client engineer sign the same numbers, ideally at the work face. Format and discipline in our JMS guide.
3. Measurement book — the numbered, initialled legal register that RA bills cite. The measurement book guide covers MB rules, corrections, and test checks.
4. Abstract and bill — quantities meet rates. How rates are built from measured quantities is the subject of rate analysis, and the full path from drawings to a priced bill is in how to prepare a BOQ from drawings.

Measurement mistakes compound silently through that chain: a wrong deduction in the sheet becomes a certified MB entry, then a paid bill, then a dispute at final bill two years later. This is exactly the layer we are building software for — SiteSetu's takeoff work applies IS 1200 deduction logic as deterministic rules over quantities extracted from your drawings, so every measurement row traces back to a clause and a drawing reference. See a sample AI quantity takeoff if you want the 48-hour version of what this article does by hand.

FAQs#

Which IS code is used for estimation and costing? IS 1200 (all parts) governs how work is measured — the quantities. SP 27 illustrates it. IS 3861 covers plinth and carpet area. Rate build-up conventions come from CPWD norms and IS 7272 labour constants. "Estimation" is the combination: IS 1200 quantities priced through analysed rates.

Is any deduction made for reinforcement volume in concrete? No. Part 2 explicitly ignores the volume occupied by reinforcement, embedded pipes up to 100 sq cm cross-section, and openings up to 0.1 sqm in area.

For plastering, no deduction is made for openings up to which size? 0.5 sqm per opening — with the matching rule that jambs, soffits, and sills of such openings are not measured either. Between 0.5 and 3 sqm the reveal-based sub-rules decide one-face, half-on-each-face, or full deduction; above 3 sqm you deduct fully and measure the reveals.

For brickwork, no deduction is made for openings up to which size? 0.1 sqm — along with bearings of slabs and chajjas up to 10 cm thickness, embedded pipes up to 300 mm diameter, and ends of dissimilar members up to 0.1 sqm in section.

Are lap lengths in reinforcement payable? Authorised laps — those shown on drawings or permitted by the engineer — are measured and paid under Part 8. Laps introduced for the contractor's convenience are not. Binding wire is never payable as a separate measurement.

Is IS 1200 Part 17 still valid for road work? No. Part 17 (road work including airfield pavements) stands withdrawn on the BIS records. Road and highway measurement in India follows MoRTH specifications or the concerned agency's schedule instead.

What is the difference between a measurement book and a measurement sheet? The measurement sheet is the working computation (usually Excel); the measurement book is the numbered legal register maintained under CPWD/PWD rules whose certified entries back every RA bill. Sheets feed the book; the book feeds the bill.

My contract just says "as per IS 1200". Which edition applies? If the contract says "latest revision" or is silent, the edition current on the date of measurement dispute generally applies — and 13 parts were re-issued between 2024 and 2026, so the answer may have changed mid-project. If the contract names a year, that edition governs. Check before you concede or claim a deduction.