Sut to MM Converter (सूत से मिलीमीटर)
Convert sut ↔ mm ↔ inch for pipes, rods, fittings
पाइप, रॉड, फिटिंग के लिए सूत, mm और इंच में बदलें
In Indian hardware and plumbing trade, sut (सूत) is a traditional unit used to describe pipe, rod, and bar diameters. 1 sut equals 1/8 inch, which is exactly 3.175 mm. So 2 sut = 1/4 inch (6.35 mm), 4 sut = 1/2 inch (12.7 mm), 8 sut = 1 inch (25.4 mm), and 16 sut = 2 inches (50.8 mm). Karigars, fabricators, plumbers, and pipe-fitters across Delhi NCR, UP, Bihar, and most of North India order pipes, fittings, and pneumatic tubes in sut rather than in metric or imperial units. The conversion formula is simple: mm = sut × 3.175, and inches = sut ÷ 8. This converter also reverses the direction — enter any mm value and it returns the nearest sut and inch equivalents, useful when you are reading a drawing in mm but buying parts in sut at the local hardware store.
Calculator
ƒFormula
mm = sut × 3.175 | inch = sut ÷ 8 | sut = mm ÷ 3.175Sut is defined as 1/8 of an imperial inch. Since 1 inch = 25.4 mm, it follows that 1 sut = 25.4 ÷ 8 = 3.175 mm. All three forms (sut, inch, mm) describe the same physical diameter — just different naming conventions used in different parts of the supply chain.
Units: sut (सूत) · millimetre (mm) · inch (in)
सूत क्या होता है? (What is sut?)
सूत भारतीय हार्डवेयर बाज़ार की एक पुरानी और आज भी प्रचलित इकाई है। 1 सूत = 1/8 इंच = 3.175 मिलीमीटर। जब आप दुकानदार से कहते हैं 'चार सूत का पाइप चाहिए', तो उसका मतलब होता है ½ इंच (12.7 mm) का पाइप। Plumber, welder, fabricator और pneumatic karigar — सब इसी भाषा में बात करते हैं। यह calculator आपको sut, mm, और inch — तीनों में instant conversion देता है। Drawing metric में हो, लेकिन खरीदारी sut में करनी हो — तो यह tool आपकी मदद करेगा।
Worked Examples
A plumber needs a 4-sut pipe
Problem: The site drawing specifies a ½-inch pipe, but the local hardware shop deals in sut. How many sut is that?
Solution: ½ inch = 4 sut (since 8 sut = 1 inch). In mm, that's 4 × 3.175 = 12.7 mm. Ask for '4 sut ka pipe' — you will get a ½-inch / 12.7 mm pipe.
Reading a Japanese CAD drawing at a Noida workshop
Problem: An imported machine drawing calls for a 19 mm tube fitting. The worker only speaks in sut.
Solution: 19 mm ÷ 3.175 = 5.98 sut ≈ 6 sut. That matches ¾-inch (6 sut = 19.05 mm). Order '6 sut ka fitting'.
Pneumatic cylinder port size
Problem: SPAC ESNC cylinder has a G1/4 port. What is that in sut?
Solution: G1/4 is ¼-inch BSP thread = 2 sut. When you order push-in fittings at a local shop, ask for '2 sut ka fitting'.
Sut to MM to Inch — Full Chart (1 to 16 Sut)
सूत चार्ट — 1 से 16 सूत तक
| Sut (सूत) | Inch | Millimetre | Common Use |
|---|---|---|---|
| 1 sut | 1/8" | 3.175 mm | Thin PU tubes, small fittings |
| 2 sut | 1/4" | 6.35 mm | G1/4 pneumatic port, air line fittings |
| 3 sut | 3/8" | 9.525 mm | Small hydraulic, compressor outlets |
| 4 sut | 1/2" | 12.7 mm | Standard plumbing, G1/2 fittings |
| 5 sut | 5/8" | 15.875 mm | Mid-range water pipes |
| 6 sut | 3/4" | 19.05 mm | G3/4 GI pipe, common household |
| 7 sut | 7/8" | 22.225 mm | Rare size, special orders |
| 8 sut | 1" | 25.4 mm | 1-inch GI / MS pipe — very common |
| 10 sut | 1-1/4" | 31.75 mm | Main water line, industrial feed |
| 12 sut | 1-1/2" | 38.1 mm | Large industrial pipe |
| 14 sut | 1-3/4" | 44.45 mm | Heavy duty, rare |
| 16 sut | 2" | 50.8 mm | 2-inch trunk line, compressor main |
Indian hardware and pneumatic dealers commonly stock 1, 2, 4, 6, 8, 10, and 16 sut pipe sizes. Odd sizes (7, 9, 11 sut) are special-order.
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Push-in fittings, L/T/Y connectors, PU tubes — sizes from 2 sut (G1/4) upward.
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View productsFrequently Asked Questions — Sut to MM Converter (सूत से मिलीमीटर)
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