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US Ton-force to Kilogram-force Converter

Convert US tons-force to kilograms-force with our free online force converter.

Quick Answer

1 US Ton-force = 907.18474 kilograms-force

Formula: US Ton-force × conversion factor = Kilogram-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

US Ton-force to Kilogram-force Calculator

How to Use the US Ton-force to Kilogram-force Calculator:

  1. Enter the value you want to convert in the 'From' field (US Ton-force).
  2. The converted value in Kilogram-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 (⇌) to reverse the conversion direction.
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How to Convert US Ton-force to Kilogram-force: Step-by-Step Guide

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

Formula:

kgf = tonf × 907.185

Example Calculation:

1 tonf = 907.18474 kgf

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.

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📋 Unit Symbols

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What is a US Ton-force and a Kilogram-force?

US ton-force (short ton-force) is the force exerted by one short ton (2,000 pounds) under standard gravity.

Formula: 1 tonf = 2,000 lbf = 2 kip

Conversions:

  • 1 tonf = 8,896.44 N (newtons)
  • 1 tonf = 8.89644 kN (kilonewtons)
  • 1 tonf = 2,000 lbf (pounds-force)
  • 1 tonf = 2 kip (kilopounds)
  • 1 tonf = 907.185 kgf (kilogram-force)
  • 1 tonf = 0.907185 metric ton-force
  • 1 tonf = 0.892857 UK ton-force (long ton-force)

Kilogram-force (kgf) is the force exerted by one kilogram of mass under standard gravity (9.80665 m/s²).

Formula: 1 kgf = 1 kg × 9.80665 m/s²

Conversions:

  • 1 kgf = 9.80665 N (newtons)
  • 1 kgf = 0.00980665 kN (kilonewtons)
  • 1 kgf = 2.204623 lbf (pounds-force)
  • 1 kgf = 1,000 gf (gram-force)
  • 1 kgf = 980,665 dynes
  • 1 kgf = 35.274 ozf (ounce-force)

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

History of the US Ton-force and Kilogram-force

The US ton-force is based on the short ton of 2,000 pounds, the standard ton in the United States. The short ton (as opposed to the UK's long ton of 2,240 pounds) became standardized in American commerce and industry in the 19th century. As a force unit, ton-force provides a convenient scale for heavy loads in US engineering, particularly in construction equipment, crane capacities, and structural design. It is closely related to the kip (1,000 lbf), with 1 ton-force = 2 kips. While international engineering uses kilonewtons, US ton-force remains common in American construction, heavy industry, and equipment specifications.

Kilogram-force emerged from the meter-kilogram-second gravitational system (MKS), which was used extensively in engineering before the adoption of SI units in the 1960s. In German-speaking countries and parts of Europe, it was called "kilopond" (kp), from the Latin word for weight. Despite the official adoption of the newton as the SI unit of force in 1960, kilogram-force remains prevalent in many engineering disciplines, particularly in automotive torque specifications, hydraulic systems, material testing, and construction equipment. Many Asian and European countries continue to use kgf in technical documentation and consumer products.

Common Uses and Applications: US tons-force vs kilograms-force

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

Common Uses for US tons-force

Construction Equipment: Crane capacity, lifting equipment, heavy machinery ratings.

Structural Engineering: Large building loads, bridge components, foundation design.

Industrial Equipment: Press capacity, forging equipment, material handling.

Marine Engineering: Ship displacement, anchor forces, dock equipment.

Automotive: Heavy vehicle specifications, towing capacity, load ratings.

When to Use kilograms-force

Automotive Engineering: Torque specifications (kgf·m), suspension loads, brake force.

Hydraulic Systems: Pressure ratings (kgf/cm² = 1 technical atmosphere).

Material Testing: Tensile strength, compression testing, hardness measurements.

Construction: Structural loads, lifting equipment capacity, crane ratings.

Consumer Products: Weight capacity labels, exercise equipment resistance.

Conversion Table: US Ton-force to Kilogram-force

US Ton-force (tonf)Kilogram-force (kgf)
0.5453.592
1907.185
1.51,360.777
21,814.37
54,535.924
109,071.847
2522,679.619
5045,359.237
10090,718.474
250226,796.185
500453,592.37
1,000907,184.74

People Also Ask

How do I convert US Ton-force to Kilogram-force?

To convert US Ton-force to Kilogram-force, enter the value in US Ton-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 →

What is the conversion factor from US Ton-force to Kilogram-force?

The conversion factor depends on the specific relationship between US Ton-force and Kilogram-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 Kilogram-force back to US Ton-force?

Yes! You can easily convert Kilogram-force back to US Ton-force by using the swap button (⇌) in the calculator above, or by visiting our Kilogram-force to US Ton-force converter page. You can also explore other force conversions on our category page.

Learn more →

What are common uses for US Ton-force and Kilogram-force?

US Ton-force and Kilogram-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

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📚 How to Convert Units

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🔢 Conversion Formulas

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⚖️ Metric vs Imperial

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⚠️ Common Mistakes

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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

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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 — Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization — Quantities and units international standards series

Last verified: February 19, 2026