UnitsConverter

Ounce-force to Gram-force Converter

Convert ounces-force to grams-force with our free online force converter.

Quick Answer

1 Ounce-force = 28.349523 grams-force

Formula: Ounce-force Ɨ conversion factor = Gram-force

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Ounce-force to Gram-force Calculator

How to Use the Ounce-force to Gram-force Calculator:

  1. Enter the value you want to convert in the 'From' field (Ounce-force).
  2. The converted value in Gram-force will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Force category.
  4. Click the swap button (ā‡Œ) to reverse the conversion direction.
Share:

How to Convert Ounce-force to Gram-force: Step-by-Step Guide

Converting Ounce-force to Gram-force involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

gf = ozf Ɨ 28.3495

Example Calculation:

1 ozf = 28.349523 gf

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

Need to convert to other force units?

View all Force conversions ā†’
šŸ“Š Force Table

Print-friendly conversion reference

šŸ“‹ Unit Symbols

Copy ozf & gf symbols

What is a Ounce-force and a Gram-force?

Ounce-force (ozf) is the force exerted by one avoirdupois ounce of mass under standard gravity (32.174 ft/sĀ²).

Formula: 1 ozf = 1 oz Ɨ 32.174 ft/sĀ²

Conversions:

  • 1 ozf = 0.278014 N (newtons)
  • 1 ozf = 0.0625 lbf (1/16 pound-force)
  • 1 ozf = 28.35 gf (gram-force)
  • 1 ozf = 0.02835 kgf (kilogram-force)
  • 1 ozf = 278,014 dynes
  • 16 ozf = 1 lbf

Gram-force (gf) is the force exerted by one gram of mass under standard gravity (9.80665 m/sĀ²).

Formula: 1 gf = 1 gram Ɨ 9.80665 m/sĀ²

Conversions:

  • 1 gf = 0.00980665 N (newtons)
  • 1 gf = 9.80665 mN (millinewtons)
  • 1 gf = 980.665 dynes
  • 1 gf = 0.001 kgf (kilogram-force)
  • 1 gf = 0.00220462 lbf (pounds-force)
  • 1 gf = 0.035274 ozf (ounce-force)

Note: The Ounce-force is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Gram-force belongs to the metric (SI) system.

History of the Ounce-force and Gram-force

Ounce-force derives from the avoirdupois ounce, part of the imperial system developed in medieval England for commerce. The ounce (1/16 of a pound) was standardized for general goods, distinguishing it from the troy ounce used for precious metals. As a force unit, ounce-force became common in applications requiring finer precision than pounds, such as pharmacy scales, postal scales, and small mechanical springs. While metric units have largely replaced ozf in scientific and international contexts, it persists in US consumer products, food packaging, fishing equipment, and some mechanical specifications.

Gram-force emerged from the metric gravitational system of units, which was widely used in continental Europe before the adoption of SI units. The unit is also known as "gram-weight" or "pond" (from the Latin word for weight). While it remains in common use for consumer scales, spring specifications, and small mechanical devices, scientific and engineering applications increasingly prefer SI units like millinewtons. The gram-force is particularly persistent in industries like watchmaking, jewelry, and precision instruments where tradition and existing equipment favor its continued use.

Common Uses and Applications: ounces-force vs grams-force

Explore the typical applications for both Ounce-force (imperial/US) and Gram-force (metric) to understand their common contexts.

Common Uses for ounces-force

Consumer Products: Package weight labels, kitchen scales, postal scales.

Fishing Equipment: Fishing line test strength, lure weights, rod action ratings.

Food Industry: Portion control, ingredient measurements, packaging specifications.

Small Springs: Tension spring ratings, retractable mechanisms, small mechanical devices.

Precision Scales: Laboratory balances, jewelry scales, pharmacy measurements.

When to Use grams-force

Laboratory Equipment: Spring scales, force gauges, material testing of small samples.

Watchmaking: Mainspring tension specifications (typically 50-500 gf).

Jewelry: Measuring clasp strength and chain durability.

Mechanical Engineering: Small spring constants, contact force specifications.

Consumer Products: Kitchen scales, postal scales, fishing line strength.

Additional Unit Information

About Ounce-force (ozf)

How do I convert ounce-force to newtons?

Formula: N = ozf Ɨ 0.278014

Examples:

  • 1 ozf = 0.278 N
  • 4 ozf = 1.11 N
  • 16 ozf = 4.45 N
  • 32 ozf = 8.90 N

Quick approximation: Multiply by 0.28 for rough conversion.

Ounce-force to Newtons converter ā†’

How many ounce-force equal one pound-force?

1 pound-force = 16 ounce-force

Quick conversions:

  • 0.25 lbf = 4 ozf
  • 0.5 lbf = 8 ozf
  • 1 lbf = 16 ozf
  • 2 lbf = 32 ozf

Reverse: 1 ozf = 0.0625 lbf (1/16 of a pound-force)

Pounds-force to Ounce-force converter ā†’

What is the difference between ounce and ounce-force?

Ounce (oz): Unit of MASS - measures amount of matter.

Ounce-force (ozf): Unit of FORCE - measures weight or push/pull.

Relationship: On Earth at standard gravity, 1 ounce of mass exerts 1 ounce-force.

Important distinction: In space (zero gravity), a 1-ounce mass still has 1 ounce of mass but exerts 0 ounce-force. On the Moon, it would exert ~0.17 ozf due to lower gravity.

Note: In everyday US usage, "ounce" typically refers to weight (force), but in physics and engineering, the distinction matters.

What is a troy ounce-force?

Troy ounce-force is based on the troy ounce (31.1 grams), used for precious metals:

  • 1 troy ozf = 0.305 N
  • 1 troy ozf = 1.097 avoirdupois ozf
  • 1 troy ozf = 31.1 gf

Avoirdupois ounce-force (standard ozf) is based on the avoirdupois ounce (28.35 grams), used for general goods.

Most force applications use avoirdupois ounce-force unless specifically dealing with precious metals or pharmacy.

Convert ounce-force to other force units ā†’

Conversion Table: Ounce-force to Gram-force

Ounce-force (ozf)Gram-force (gf)
0.514.175
128.35
1.542.524
256.699
5141.748
10283.495
25708.738
501,417.476
1002,834.952
2507,087.381
50014,174.762
1,00028,349.523

People Also Ask

How do I convert Ounce-force to Gram-force?

To convert Ounce-force to Gram-force, enter the value in Ounce-force in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our force converter page to convert between other units in this category.

Learn more ā†’

What is the conversion factor from Ounce-force to Gram-force?

The conversion factor depends on the specific relationship between Ounce-force and Gram-force. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Gram-force back to Ounce-force?

Yes! You can easily convert Gram-force back to Ounce-force by using the swap button (ā‡Œ) in the calculator above, or by visiting our Gram-force to Ounce-force converter page. You can also explore other force conversions on our category page.

Learn more ā†’

What are common uses for Ounce-force and Gram-force?

Ounce-force and Gram-force are both standard units used in force measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our force converter for more conversion options.

For more force conversion questions, visit our FAQ page or explore our conversion guides.

Helpful Conversion Guides

Learn more about unit conversion with our comprehensive guides:

šŸ“š How to Convert Units

Step-by-step guide to unit conversion with practical examples.

šŸ”¢ Conversion Formulas

Essential formulas for force and other conversions.

āš–ļø Metric vs Imperial

Understand the differences between measurement systems.

āš ļø Common Mistakes

Learn about frequent errors and how to avoid them.

View All Guides ā†’

All Force Conversions

Newton to MillinewtonNewton to KilonewtonNewton to MeganewtonNewton to DyneNewton to Pound-forceNewton to Kilogram-forceNewton to Gram-forceNewton to Metric Ton-forceNewton to US Ton-forceNewton to UK Ton-forceNewton to PoundalNewton to Ounce-forceNewton to KipMillinewton to NewtonMillinewton to KilonewtonMillinewton to MeganewtonMillinewton to DyneMillinewton to Pound-forceMillinewton to Kilogram-forceMillinewton to Gram-forceMillinewton to Metric Ton-forceMillinewton to US Ton-forceMillinewton to UK Ton-forceMillinewton to PoundalMillinewton to Ounce-forceMillinewton to KipKilonewton to NewtonKilonewton to MillinewtonKilonewton to MeganewtonKilonewton to DyneKilonewton to Pound-forceKilonewton to Kilogram-forceKilonewton to Gram-forceKilonewton to Metric Ton-forceKilonewton to US Ton-forceKilonewton to UK Ton-forceKilonewton to PoundalKilonewton to Ounce-forceKilonewton to KipMeganewton to NewtonMeganewton to MillinewtonMeganewton to KilonewtonMeganewton to DyneMeganewton to Pound-forceMeganewton to Kilogram-forceMeganewton to Gram-forceMeganewton to Metric Ton-forceMeganewton to US Ton-forceMeganewton to UK Ton-forceMeganewton to PoundalMeganewton to Ounce-forceMeganewton to KipDyne to NewtonDyne to MillinewtonDyne to KilonewtonDyne to MeganewtonDyne to Pound-forceDyne to Kilogram-forceDyne to Gram-forceDyne to Metric Ton-forceDyne to US Ton-forceDyne to UK Ton-forceDyne to PoundalDyne to Ounce-forceDyne to KipPound-force to NewtonPound-force to MillinewtonPound-force to KilonewtonPound-force to MeganewtonPound-force to DynePound-force to Kilogram-forcePound-force to Gram-forcePound-force to Metric Ton-forcePound-force to US Ton-forcePound-force to UK Ton-forcePound-force to PoundalPound-force to Ounce-forcePound-force to KipKilogram-force to NewtonKilogram-force to MillinewtonKilogram-force to KilonewtonKilogram-force to MeganewtonKilogram-force to DyneKilogram-force to Pound-forceKilogram-force to Gram-forceKilogram-force to Metric Ton-forceKilogram-force to US Ton-forceKilogram-force to UK Ton-forceKilogram-force to PoundalKilogram-force to Ounce-forceKilogram-force to KipGram-force to NewtonGram-force to MillinewtonGram-force to KilonewtonGram-force to MeganewtonGram-force to DyneGram-force to Pound-forceGram-force to Kilogram-forceGram-force to Metric Ton-forceGram-force to US Ton-forceGram-force to UK Ton-forceGram-force to PoundalGram-force to Ounce-forceGram-force to KipMetric Ton-force to NewtonMetric Ton-force to MillinewtonMetric Ton-force to KilonewtonMetric Ton-force to MeganewtonMetric Ton-force to DyneMetric Ton-force to Pound-forceMetric Ton-force to Kilogram-forceMetric Ton-force to Gram-forceMetric Ton-force to US Ton-forceMetric Ton-force to UK Ton-forceMetric Ton-force to PoundalMetric Ton-force to Ounce-forceMetric Ton-force to KipUS Ton-force to NewtonUS Ton-force to MillinewtonUS Ton-force to Kilonewton

Other Force Units and Conversions

Explore other force units and their conversion options:

View all force units ā†’

Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Reference on Constants, Units and Uncertainty

National Institute of Standards and Technology ā€” Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures ā€” International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization ā€” Quantities and units international standards series

Last verified: February 19, 2026