🔄 Engineering Unit Converter

Unit Converter — Pakistan & International Standards

Convert between all engineering units instantly. Includes Pakistan-specific local units — Marla, Kanal, Acre, Sarsai — plus full international SI and imperial standards used in Gulf projects.

🇵🇰 Pakistan Local Units 🌍 SI International 🇬🇧 Imperial / British 🇸🇦 Gulf Standards 8 Categories · 60+ Units

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Length Converter

Metre · Foot · Inch · Yard · Hath · Gaz · Karam · Mile

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🇵🇰 Pakistan Local Land & Measurement Units — Complete Reference

Pakistan uses a unique set of traditional land measurement units inherited from Mughal and British colonial times. These units vary slightly between Punjab, Sindh, KPK, and Balochistan. The values below are the standard Punjab/Federal Government definitions.

Land Area Units (Pakistan Standard)

1 Sarsai

= 30.25 sq ft
= 2.81 m²

Smallest standard unit

1 Marla

= 9 Sarsai
= 272.25 sq ft
= 25.29 m²

Most common plot unit

1 Kanal

= 20 Marla
= 5,445 sq ft
= 505.86 m²

Standard house plot

1 Acre

= 8 Kanal
= 43,560 sq ft
= 4,046.86 m²

Agricultural land

1 Murabba

= 25 Acre
= 1,08,900 sq ft
= 10.117 hectare

Large farm unit (Punjab)

1 Bigha (Punjab)

= 1,008 sq yd
= 843.3 m²
= ⅛ Murabba approx

Varies by region

1 Karam

= 5.5 ft (length)
= 1.676 m

Length unit for plots

1 Sq Karam

= 30.25 sq ft
= 2.81 m²
= 1 Sarsai

= 1 Sarsai exactly

📌 Important: In Pakistan's major cities, plot sizes are typically described as "5 Marla", "10 Marla", "1 Kanal" etc. A standard 5-Marla house = 1,361.25 sq ft. A standard 10-Marla house = 2,722.5 sq ft. A 1-Kanal house = 5,445 sq ft.

Pakistan Local Length & Weight Units

Pakistan Unit	Equals	SI Equivalent	Common Use
1 Hath / Hatha	18 inches	0.4572 m	Cloth, small measurements
1 Gaz	36 inches (1 yard)	0.9144 m	Fabric, carpets, old maps
1 Karam	5.5 feet	1.676 m	Plot dimensions
1 Farsakh	≈ 3 miles	≈ 4.83 km	Long distances (historical)
1 Maund (Mann)	40 Seer	37.32 kg	Agricultural produce, steel bars old reference
1 Seer (Sir)	16 Chhatak	0.9330 kg	Food, small quantities
1 Chhatak	5 Tola	58.32 g	Spices, gold, small weights
1 Tola	12 Masha	11.664 g	Gold, silver jewellery

🌍 International Engineering Units — Quick Reference Tables

📏 Length Conversions

From	To	Multiply By	Engineering Use
1 foot	0.3048 m	× 0.3048	Site dimensions, floor heights
1 inch	25.4 mm	× 25.4	Rebar diameter, slab thickness
1 metre	3.2808 ft	× 3.2808	Column height, span lengths
1 yard	0.9144 m	× 0.9144	Fabric, carpet, old British drawings
1 mile	1,609.34 m	× 1,609.34	Road distances, infrastructure
1 km	0.6214 miles	× 0.6214	Highway chainage
1 Karam 🇵🇰	5.5 ft = 1.676 m	× 5.5 (ft)	Plot boundaries in Pakistan

⬜ Area Conversions

From	To	Multiply By	Engineering Use
1 sq ft	0.09290 m²	× 0.09290	Floor area, wall area
1 m²	10.764 sq ft	× 10.764	Concrete formwork, tiling
1 Marla 🇵🇰	25.29 m²	× 25.29	Residential plot sizing
1 Kanal 🇵🇰	505.86 m²	× 505.86	Larger plot sizing
1 Acre	4,046.86 m²	× 4,046.86	Agricultural land
1 Hectare	10,000 m²	× 10,000	Large project areas
1 sq mile	2.590 km²	× 2.590	Township, infrastructure

📦 Volume Conversions

From	To	Multiply By	Construction Use
1 cft	0.02832 m³	× 0.02832	Sand, aggregate ordering
1 m³	35.315 cft	× 35.315	Concrete volume calculation
1 cft	28.317 litres	× 28.317	Water tank capacity
1 m³	1,000 litres	× 1,000	Water supply systems
1 cu yard	0.7646 m³	× 0.7646	Excavation (old drawings)
1 US gallon	3.7854 litres	× 3.7854	Paint, chemicals
1 UK gallon	4.5461 litres	× 4.5461	Older British specifications

⚖️ Weight & Mass Conversions

From	To	Multiply By	Engineering Use
1 tonne	1,000 kg	× 1,000	Steel tonnage, bulk materials
1 kg	2.2046 lb	× 2.2046	Export / import docs
1 kg	0.001 tonne	× 0.001	Material takeoff BOQ
1 US ton	907.18 kg	× 907.18	American project specs
1 UK ton	1,016.05 kg	× 1,016.05	British project specs
1 Maund 🇵🇰	37.32 kg	× 37.32	Agricultural produce
1 bag cement	50 kg	fixed	Pakistan standard bag

🔩 Pressure Conversions — Concrete & Structural

Concrete Grade	MPa	PSI	kgf/cm²	N/mm²
M10	10 MPa	1,450	102	10 N/mm²
M15	15 MPa	2,175	153	15 N/mm²
M20 (standard)	20 MPa	2,900	204	20 N/mm²
M25	25 MPa	3,625	255	25 N/mm²
M30	30 MPa	4,350	306	30 MPa
M40	40 MPa	5,800	408	40 N/mm²

🇸🇦 Gulf Region Engineering Units — Saudi Arabia, UAE, Qatar

Pakistani engineers working in Saudi Arabia, UAE, and Qatar frequently encounter these specifications. Gulf projects use a mix of SI units and American standards (from ARAMCO and SABIC specifications).

Parameter	Gulf Standard	Pakistan Equivalent	Notes
Concrete strength	PSI or MPa	M20 = 20 MPa = 2,900 PSI	ARAMCO uses PSI, SABIC uses MPa
Steel yield strength	Grade 60 (US) or Fe500	Fe500 = Grade 60 = 500 MPa	Same steel, different naming
Land area	m² or sq metre	Convert: 1 Kanal = 505.86 m²	No Marla/Kanal used in Gulf
Load units	kN, kN/m, kN/m²	1 tonne-force = 9.81 kN ≈ 10 kN	Always use kN in Gulf BOQ
Pipe sizes	Nominal Pipe Size (NPS) in inches	1" NPS ≠ 1" OD (nominal only)	Common source of confusion
Temperature	°C (Celsius)	Same as Pakistan	ARAMCO uses °F in some specs
Speed (wind)	m/s or km/h	Same SI units	Design wind: 30–50 m/s Gulf

💡 When working on ARAMCO or SABIC projects: always check whether the specification uses US Customary units (PSI, lbf, ft) or SI units (MPa, kN, m). Mixed-unit errors are common and dangerous. When in doubt, add a unit label to every number in your calculations.

❓ Frequently Asked Questions

1 Marla = 9 Sarsai = 272.25 square feet = 25.29 square metres. This is the official Government of Pakistan standard definition. However, some private housing societies in Lahore, Islamabad, and Karachi use a slightly different definition where 1 Marla = 225 sq ft (15 ft × 15 ft). Always confirm which definition is being used when buying or selling property.

10 Marla = 10 × 272.25 = 2,722.5 square feet = 252.9 square metres. A standard 10-Marla plot in DHA Lahore or Bahria Town is typically 35 ft wide × 70 ft deep = 2,450 sq ft (inner dimension) with additional road-side space. The constructed area on a 10-Marla plot is typically 2,000–2,400 sq ft for a double-storey house.

MPa (Megapascal) and N/mm² (Newton per square millimetre) are exactly equal. 1 MPa = 1 N/mm². Both are used interchangeably in structural engineering. Pakistani and Gulf engineers commonly use MPa for concrete grades (M20 = 20 MPa) while some older British standards use N/mm². 1 MPa = 145.04 PSI = 10.197 kgf/cm² = 0.1 bar.

1 cubic foot (cft) = 0.028317 cubic metres (m³). To convert: multiply cft by 0.028317. Conversely, 1 m³ = 35.3147 cft. Example: 100 cft of sand = 100 × 0.028317 = 2.83 m³. This conversion is essential for concrete calculations where volumes are first calculated in cft (length in feet × width × depth) and then converted to m³ for material quantities.

1 Maund (Mann) = 40 Seer = 37.32 kg in the official Pakistan definition. However, older usage sometimes refers to 1 Maund = 40 kg (rounded). In construction, the Maund is rarely used today — steel is ordered in tonnes or kg, cement in 50 kg bags. However, in rural areas and agriculture, Maund is still commonly used for grain, fertiliser, and produce quantities. Always clarify which Maund definition is being used as the 37.32 kg vs 40 kg difference matters for large quantities.

1 MPa = 145.038 PSI. To convert PSI to MPa: divide by 145.038. Examples: 2,500 PSI ÷ 145 ≈ 17.2 MPa (between M15 and M20) · 3,000 PSI ÷ 145 ≈ 20.7 MPa (M20) · 4,000 PSI ÷ 145 ≈ 27.6 MPa (between M25 and M30). ARAMCO and US specifications commonly specify concrete in PSI while Pakistani and Gulf standards use MPa. 3,000 PSI concrete is approximately equivalent to M20.

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