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IS 1956 : 2001Indian Standard Code for Letter Symbols for Quantities and Units

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ISO 80000-1

CurrentFrequently UsedCode of PracticeGeneral · Testing Methods and Quality Control

Link points to Internet Archive / others. Not hosted by InfraLens. Details

IS 1956:2001 is the Indian Standard (BIS) for indian standard code for letter symbols for quantities and units. IS 1956 standardizes quantity symbols and SI units for use in Indian Standards and engineering documents. Ensures consistent use of m (metre), kg (kilogram), N (newton), Pa (pascal), etc. across all IS codes and engineering practice in India.

Standard symbols and abbreviations for physical quantities and units used in Indian Standards and engineering documents.

Overview

Status: Current
Usage level: Frequently Used
Domain: General — Testing Methods and Quality Control
Type: Code of Practice

International equivalents

ISO 80000-1:2022 · ISO

Also on InfraLens for IS 1956

5Key values 3Tables 1FAQs

Practical Notes

! India officially uses SI units per IS 1956. Some IS codes still have legacy units (kgf/cm²) in older editions.

! 1 MPa = 1 N/mm² = 10.2 kgf/cm² — conversion needed when reading older IS codes.

! kgf (kilogram-force) is NOT the same as kg (kilogram mass). Many Indian engineers still confuse them.

Frequently referenced clauses

Part 1 — SI base units and derived units

Part 2 — Symbols for mechanical quantities

Part 3 — Symbols for thermal quantities

Part 4 — Symbols for electrical quantities

SI unitssymbolsabbreviationsunitsmetrekilogramnewton

International Equivalents

Similar International Standards

ISO 80000-1:2022ISO

HighCurrent

Quantities and units — Part 1: General

IS 1956 is aligned with ISO 80000 for SI quantities and units.

Key Differences

Key Similarities

≈Both standardize the International System of Units (SI) for scientific and engineering use.

Parameter Comparison

Parameter	IS Value	International	Source

⚠ Verify details from original standards before use

Key Values5

Quick Reference Values

Lengthm (metre)

Masskg (kilogram)

ForceN (newton)

PressurePa (pascal) or MPa

StressMPa (megapascal)

Tables & Referenced Sections

Key Tables

Table 1 — SI base units

Table 2 — SI derived units

Table 3 — Prefixes (kilo, mega, giga, etc.)

Frequently Asked Questions1

What units does India use for stress/pressure?+

Official: MPa (megapascal) = N/mm². Older codes may show kgf/cm². Conversion: 1 MPa = 10.2 kgf/cm². All new IS codes use SI units per IS 1956.

QA/QC Inspection Templates

📋

QA/QC templates coming soon for this code.

Browse all 300 templates →

BOQ Builder·Auto-BOQ from dimensions, DSR ratesNEW→BidEasy·Government tenders, searchableLIVE→

IS 1956 : 2001Indian Standard Code for Letter Symbols for Quantities and Units

PDF Google Compare BIS Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

ISO 80000-1

CurrentFrequently UsedCode of PracticeGeneral · Testing Methods and Quality Control

PDF Google Compare BIS Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

Standard symbols and abbreviations for physical quantities and units used in Indian Standards and engineering documents.

Overview

Status: Current
Usage level: Frequently Used
Domain: General — Testing Methods and Quality Control
Type: Code of Practice

International equivalents

ISO 80000-1:2022 · ISO

Also on InfraLens for IS 1956

5Key values 3Tables 1FAQs

Practical Notes

! India officially uses SI units per IS 1956. Some IS codes still have legacy units (kgf/cm²) in older editions.

! 1 MPa = 1 N/mm² = 10.2 kgf/cm² — conversion needed when reading older IS codes.

! kgf (kilogram-force) is NOT the same as kg (kilogram mass). Many Indian engineers still confuse them.

Frequently referenced clauses

Part 1 — SI base units and derived units

Part 2 — Symbols for mechanical quantities

Part 3 — Symbols for thermal quantities

Part 4 — Symbols for electrical quantities

SI unitssymbolsabbreviationsunitsmetrekilogramnewton

International Equivalents

Similar International Standards

ISO 80000-1:2022ISO

HighCurrent

Quantities and units — Part 1: General

IS 1956 is aligned with ISO 80000 for SI quantities and units.

Key Differences

Key Similarities

≈Both standardize the International System of Units (SI) for scientific and engineering use.

Parameter Comparison

Parameter	IS Value	International	Source

⚠ Verify details from original standards before use

Key Values5

Quick Reference Values

Lengthm (metre)

Masskg (kilogram)

ForceN (newton)

PressurePa (pascal) or MPa

StressMPa (megapascal)

Tables & Referenced Sections

Key Tables

Table 1 — SI base units

Table 2 — SI derived units

Table 3 — Prefixes (kilo, mega, giga, etc.)

Frequently Asked Questions1

What units does India use for stress/pressure?+

Official: MPa (megapascal) = N/mm². Older codes may show kgf/cm². Conversion: 1 MPa = 10.2 kgf/cm². All new IS codes use SI units per IS 1956.

QA/QC Inspection Templates

📋

QA/QC templates coming soon for this code.

Browse all 300 templates →

IS 1956 : 2001Indian Standard Code for Letter Symbols for Quantities and Units

Overview

International Equivalents

Key Values5

Tables & Referenced Sections

Frequently Asked Questions1

QA/QC Inspection Templates

More related

IS 1956 : 2001Indian Standard Code for Letter Symbols for Quantities and Units

Overview

International Equivalents

Key Values5

Tables & Referenced Sections

Frequently Asked Questions1

QA/QC Inspection Templates

More related